Process control - Hindawi Publishing Corporation
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1. Further information from Matheson Gas Products Inc 30 Seaview Drive Secaucus New Jersey 07094 USA Circle No 12 on Reader Enquiry Card Process oxygen analyser The new 1100A analyser has two parts a transducer unit and a control unit these can be mounted up to 300m apart the functions of the transducer unit being controlled and monitored through the control unit s keyboard Electronic stirrer Dimensions are 215 mm x 215 mm x 55mm deep weight is 1 5 kg A wide speed range permits stirring of both large and small volumes and high and low viscosities Both units were designed to be used in Zone II Division 2 hazardous areas and a version of the transducer unit is suitable for Zone Division 1 Gas samples can be hazardous oxygen enriched certification has been applied for Supplied as standard is an isolated 4 20mA output with the microprocessor giving a choice of seven spans and a zero suppression facility to 99 providing several hundred output ranges The con trol unit includes a digital LCD display reading from 0 100 oxygen to 0 01 resolution and also supplies the power requirement for the transducer unit The memory is protected by battery back up Paramaguatin Ay Tranavarer Ranas IRRI DIRRON Options available include alarm relays for the built in oxygen level alarms self diagnostics sample flow alarm and pressure compensation An RS232C or current loop digital interface can be speci2. TBG ferritin alphafetoprotein and human placental lactogen is ready for sale CRP human growth hormone IgE specific IgE antibodies T3 TSH will follow shortly Tests such as HCG cir culating immune complexes streptococ cus B pneumococcus hemophilus in fluenza and anti herpes antibodies can be demonstrated and will become progress ively available ACADE are seeking applications from companies of international standing to sell exclusively world wide Their address is Passage de la Vecquee 17 bte 4100 1200 Brussels Belgium Circle No 41 on Reader Enquiry Card The CAT After 45 years titrator engineering ex perience Fisher Scientific have intro duced CAT the Computer Aided Titrimeter The aim was to make a system combining a powerful analytical capa bility with ease of use Method set up routines for the system s eight operating modes are menu driven the user simply responds to messages on a 20 character display CAT performs titrations to fixed endpoint targets titrations with deriva tive detection of equivalence points com putational methods such as equilibrium and incremental titrations as well as direct potentiometry in pH millivolts or activity with ion selective electrodes Titration rate control is automatic as are electrode standardization and electrode efficiency computation Test results entry verification prompting and status messages appear on vacuum fluorescent displays The
3. pack consisting of five autoclavable trays holding 200 tips each with integral tray and pack covers Through the use of these trays the tip can be attached directly to the pipettor without manual handling this ensures that the tip is chemically clean before drawing the sample Details from Elkay Laboratory Products UK Ltd Unit 2 Crockford Lane Basingstoke RG24 ON A Hampshire UK Tel 0256 850497 Circle No 35 on Reader Enquiry Card The new precision pipette tip from Elkay they are available in individu ally wrapped sterile packs and in bulk bags of 1000 as well as in the Company s Conve Rack pack Elkay Basingstoke UK Apple analyser LabLogic have a multichannel analyser which has been developed for appli cations such as particle size distribution analysis Many models of for example blood platelet counters count in a fixed window of size but research workers may well be interested in looking at the whole distribution of size range Similar needs exist in nuclear spectroscopy and for users of cytofluorographs The unit is based on an Apple micro computer there are no modifications to the micro bar the addition of an ac quisition board and the use of specialized programs The programs are written in compiled PASCAL and respond quickly The multichannel analyser may be pur chased to add to an existing Apple or the system may be bought complete For further details contact LabLogic 72
4. Conington Road Lewisham London SE13 7LN Circle No 3 on Reader Enquiry Card Non destructive analyser for metallic coatings A broad spectrum system for analysing metallic coatings has been developed by Philips for the general coatings industry COAT 95 is based on X ray excited emissions and can cope with coatings of thicknesses ranging from a few angstroms up to multielement or multilayer finishes extending well into the micron range Measurements can be made on silicon wafers lead frames or any other device from the largest diameter wafer down to one millimetre square samples Multielement coatings may be of any combination of elements and a complete analysis can be made within a few mi nutes The process is completely non destructive and the results highly accurate COAT 95 is simple to operate with single button operation for on line daily use It is a software system for use with the Philips PV 9500 automated energy dispersive spectrometers which employ DEC LSI 11 computers The instruments produce full information on both coating composition and thickness in the form of fast colour spectral displays Details from Pye Unicam Ltd York Street Cambridge CB1 2PX UK Tel 0223 358866 Circle No 4 on Reader Enquiry Card Zorbax and HPLC A rapid analysis small particle 3 um column for high performance liquid chro matography was introduced by Du Pont in mid October 1983 The Zorbax Golden series colum
5. Hindawi Submit your manuscripts at http www hindawi com Journal of Spectroscopy Journal of l Theoretical Chemistry International Journal of Inorganic Chemistry Pa a Fa J E Journal of Hindawi Publishing Corporation http www hindawi com Volume 2014 International Journal of medrol als aalciay Chromatography Research International Journal of Quantum S Hindawi Publishing Corporation http www hindawi com Journal of T a Analytical Methods g in a Bioinorganic Chemistry and Applications
6. 7002 offers auto matic and a good pH accuracy to plus or minus 0 02 pH as well as a resolution of 0 01 pH using most combination elec trodes It can measure temperature from 30 C to 450 C to an accuracy of plus or minus 0 7 of reading Resolution 1s 1 0 C The KM 7002 can operate with any of Kane May s standard range of 40 temperature probes To allow for non pH electrodes or other millivolt inputs the KM 7002 can also display MV from 1999 to 1999 More information from Kane May Ltd Burrowfield Welwyn Garden City Hertfordshire AL7 4TU UK Tel 07073 31051 Circle No 20 on Reader Enquiry Card 51 New products Sedicomp a computer to Sedi Graph interface designed to allow any Sedi Graph 5000 ET to be adapted to Apple II micros The interface expands the SediGraph data output capability so that it can provide tabular and graphic data in printed or video display format Sample identification and analysis calculations are apparently greatly improved using the computer system Programs and analysis data are stored on standard 5 4 in floppy disks for fast data recall and comparison of analyses The SediGraph automates the classical sedimentation technique and is noted for its wide analysis range It can analyse particle sizes in the range from 0 1 um to 100 um in a single analysis that accounts for the entire sample including diameters outside its measurement range The SediComp package includes App
7. Eldon Street Wellington Street Industrial Estate Sheffield S1 4GT UK Tel 0742 755085 Circle No 36 on Reader Enquiry Card 53 New products 2 Relative intensity ISc Cr MgSiS K O 10 20 30 Atomic number Z 40 50 Graph showing the excitation capability of Philips s scandium anode X ray tube compared with that of a chromium tube The anode greatly enhances excitation of light elements up to calcium atomic number 20 while at the same time maintaining excellent results from heavy element analyses So the new PW2180 model emerges as an attractive alternative to the chromium tube for general purpose use Apart from the anode material it is identical in construction with all other Philips side window tubes and is freely interchangeable in any of the company s sequential spectrometers Information from Pye Unicam Ltd York Street Cambridge CB1 2PX UK Circle No 37 on Reader Enquiry Card U NET for BBC micro The U NET Micronetwork system is now being shipped for the BBC micro U NET is U Microcomputers product for low cost markets and was previously available for the Apple II only U NET is a shared resources network allowing up to 32 satellite micros to share up to six disk drives and up to two printers A full printer spooling system is provided on both printers and the whole philosophy is to provide resources to the user as if he were the only user Literature is available from U
8. and current signals are accepted and the alarm output can be either via switch ing transistors or potential free relay contacts Prices start at around 150 00 Hartmann amp Braun Ltd are based at Moulton Park Northampton NN3 ITF UK Tel 0604 46311 Circle No 43 on Reader Enquiry Card Applications for Apple and BBC micro The first series of products from a Norwich based specialist microcomputer company have been designed for oper ation with BBC and Apple micros By using a microcomputer controlled ins trumentation system harnessing the computer s intelligence and standard system components the performance of traditional stand alone units is vastly improved At the same time instrumen tation quality is not compromised nor do users have to incur the high cost of a duplicated computer system The first five 58 Oasis products are intended to meet the needs of scientific educational and indus trial research users The Oasis MADC12 a high performance data acquisition module The Oasis SPP 1000 a microcom puter controlled EPROM program mer with new device personality editor and hardware protection for programmer and EPROM for the Apple and BBC micro The Oasis CADC12 a high performance fully programmable precision data acquisition system for the Apple The Oasis FTS card a firm time store for the Apple Computer Application designer This single card gives five year battery support for 1
9. caustics and so on and the transducers which strap onto the outside of the pipe will withstand temperatures in the range 300 F up to 320 F There are eight models in the range including dedicated explosion proof and portable types Most provide a 4 20mA isolated output for chart recorders or other in strumentation and optional alternative outputs are also available The standard read outs are in terms of velocity in ft or m s and knowing the internal diameter of the pipe the flow in volume per unit time can be calculated Dedicated units can be graduated in engineering units of flow if required totalizers and signal strength meters can also be fitted Of the two portable units the UFM P and UFM PD the former is housed in a robust casing suitable for use in harsh environments and for long periods the UFM PD is housed in a suitcase type enclosure and is designed for diagnostic use on a short term basis This instru ment is equipped with a flow rate indi cator totalizer signal strength meter and a built in calculator for speed and ease of use Whereas most of the units employ one transducer for use with cleaner liquids Models DHT and DHT P are offered these use a dual head transducer for effective and accurate measurement Full details from Gendeal Ltd 8 Kingsbridge Road Walton on Thames Surrey KT12 2TL UK Circle No 8 on Reader Enquiry Card Computer balance The Fisher Ainsworth MX 400 electronic ba
10. fied which allows the 1100A to be con trolled by a computer Sample handling systems to deal with wet or dry gas can be supplied and special measuring cells to resist most organic solvents or corrosive vapours are available Details from Servomex Ltd Crowborough East Sussex TN6 3DU UK Tel 08926 2181 Circle No 13 on Reader Enquiry Card SERVOMERS sey Contant Boring PKG The 1100A Industrial Process Oxygen Analyser Options include auto calibration or auto check which can be set through the keyboard for initiation at pre determined intervals or activated as required Servomex Ltd Crowborough U K 49 New products Perkin Elmer 8300 A compact easy to use and moderately priced gas chromatograph has been an nounced by Perkin Elmer The 8300 is intended for routine or process laboratories The chromatograph has automated bleed compensation optional real time display of a chromatogram and optional integral data handling facilities The system is controlled by an advanced microprocessor with user interaction through a 12in visual display unit and simple keyboard with eight soft keys The screen graphics and data hand ling options allow the 8300 to be de veloped into a complete chromatography and data processing system Chromato grams can be displayed in real time on the screen and replotted at the end of the run using variable screen widths and attenu ations Hard copy print outs can be ob ta
11. ment due to temperature variations in the reaction vessel a separately mounted temperature compensator is available Details from Kent Industrial Measure ments Ltd Analytical Instruments Hanworth Lane Chertsey Surrey KT16 9LF UK Tel 09328 62671 Circle No 15 on Reader Enquiry Card CAMAG Reprostar There is now a transilluminator to go with the CAMAG Reprostar a machine that photographs chromatograms elec tropherograms etc in visible light and under long wave and short wave UV light The transilluminator means that Reprostar users can assess and photo graph in 300nm UV light transparent objects such as RNA DNA fragments stained with ethydium bromide after gel electrophoresis The transilluminator can be retrofitted to all Reprostars For literature contact CAMAG Sonnenmattstrasse 11 CH 4132 Muttenz Switzerland Tel 061 613434 Circle No 16 on Reader Enquiry Card Chromatography Discussion Group In 1982 the Chromatography Discussion Group celibrated its Silver Jubilee having spent the previous 25 years promoting the interests of the international chromato graphic community The group now has the resources to embark on a campaign to encourage young chromatographers to become members chromatographers under 25 will be able to join for a reduced subscription of 600 per annum 1984 It is hoped that this heavily subsidized fee normal membership is 18 50 will at tract a number of young chromat
12. system s Help feature uses an accessory printer plotter to provide a read out of additional pinpointed in structions whenever required during the set up routine 57 New products Customized methods can be entered into instrument memory for use when needed the system also stores stacked sample weights entered directly from a balance or keyed in Stored data can be easily edited The instrument performs automatic computations for equivalence detection and calculation of activity or concentration in desired units With the printer plotter the system produces prin ted results with or without titration curves and thorough documentation of method parameters Optional modules can be used to adapt CAT for automated analysis of multiple samples including programmed pre treatment For complete information write to Fisher Scientific for a free copy of Bulletin 389F Fisher are based at 711 Forbes Avenue Pittsburgh Pennsylvania 15219 USA Circle No 42 on Reader Enquiry Card Solid state indicator A fully solid state indicator the A 2000 has been added to the Hartmann amp Braun range of indicating instruments The unit has a 100 segment fluorescent display in addition to a three digit indication of actual value The A 2000 can be repro grammed to give a point type or bargraph display it includes four adjustable pro grammable alarms which can be remotely set Input options are extensive both vol tage
13. the need for O rings and spacers thus reducing the assembly problems commonly associated with gas sensing electrodes Circle No 49 on Reader Enquiry Card Hydrocarbons and GC Towards the end of 1983 the PolyScience Corporation of Niles USA published Seaton T Preston Jrs and Ronald E Pankratz s Guide to the Analysis of Hydrocarbons by Gas Chromatography The 361 page book is an analyst s intro duction and reference to hydrocarbon analysis by gas chromatography a sum mary is presented of qualitative and 59 New products a SO SEN TO E E ER a I DT aN I E I es I LETT I a a a RE quantitative analysis techniques for hydrocarbons and of factors influencing the selection of liquid phases and column support materials The important physi cal properties and chemical structures for many commonly encountered hydrocar bons are included for reference The cen tral section of the book presents 210 pages of tabular retention data compiled from the literature the liquid phases for all studies included are indexed and all data sources are fully referenced The bib liography section lists 1061 references published during 1981 relevant to hydro carbon analysis The book is priced at 45 00 soft cover orders ISBN 0 913106 21 6 to PolyScience Corporation 7800 Merrimac Avenue PO Box 48312 Niles Illinois 60648 USA Circle No 50 on Reader Enquiry Card Sonic concentration analyser Model 6380 includes man
14. 6k bytes of fast access paged RAM and a flexible real time clock Pages EPROM capacity to 16k bytes is provided for the designer s firmware The Oasis Diary Card a completely self contained appointment schedu ling system for the Apple Full soft ware clock facilities and data base memory are incorporated on a single card The Oasis Diary Card utilizes memory and clock support capabi lities for the Oasis CFTS16 card Further information from Oasis Electronics Ltd University Village Norwich Norfolk NR4 7TJ UK Tel 0603 503275 Circle No 44 on Reader Enquiry Card Sensitive simple to use spectrofluorometer A high energy xenon lamp is used as the light source for Kontron s SFM 25 spect rofluorometer it also uses an efficient optical system with blazed gratings for maximum energy throughput and a high performance photomultiplier Reproducibility is ensured by reference beam compensation for variations in source output digital signal processing and continuous dark current compensation Nine sets of complete method para meters can be stored in the memory once a set has been selected the start button is pressed and the results can be read Four wavelength operating modes are available fixed wavelength excitation scan emission scan and synchroscan and these allow the SFM 25 to be used for a wide range of fluorescent analytical tech niques With fixed wavelength operation quantitative measurements of conce
15. Journal of Automatic Chemistry Volume 6 Number 1 January March 1984 pages 47 60 New Products Automated peak height analysis Compatible with almost any analyser which produces a regular series of peaks DMA s PHA 82 could save a significant amount of time in laboratories where a large throughput of samples needs to be analysed for peak height slope and other parameters Results can be stored on disk and if required printed onto laboratory note forms Based on the Commodore CBM PET computers the PHA 82 can handle up to 16 channels of analogue data a machine code operating system manages an A D interface and combines all the necessary logic for measuring and displaying the peak data in real time A double com puter package is available one com puter continuously analyses the analogue signals and the other is free to calculate the results edit the data and enter details of the next batch Full information from Digital Measurement amp Analysis 906 Woodborough Road Nottingham NG3 S5QR UK Tel 0602 622686 Circle No 1 on Reader Enquiry Card Laboratory working conditions A unique combination special stains and cover slipping bench using Corian work tops and under bench extraction has re cently been installed in the histology laboratory of the North Manchester General Hospital The benchtop com pletely fabricated from the tough non porous man made stone developed by Du Pont represents a major d
16. Micro computers Ltd Winstanley Industrial Estate Long Lane Warrington Cheshire WA2 SPR UK Tel 0925 54117 Circle No 38 on Reader Enquiry Card DNA synthesizer Using licensed phosphoramidite chem istry with high reactivity Beckman s System 1 DNA synthesizer has short cycle times and gives a high quality end product The benchtop System 1 offers a choice of complete programmability or step by step manual operation When fully automatic the integral memory of the synthesizer and easy to use mini cassettes execute the program and can synthesize 15 bases or more automatically each base addition oc curring within 30 min 56 As a combination of automatic and manual operation the System 1 can pro gram portions of the synthesis to run automatically with any number of steps to be controlled manually A run can be interrupted with the succeeding step or steps altered before resuming the program A wide range of instruments for use in recombinant DNA methodologies is available from Beckman including an HPLC system for the analysis and purifi cation of synthesized oligonucleotides System 1 includes the DNA synthesizer with a Beckman HPLC purification system plus full support in terms of a large selection of reagents and solvents for use in DNA synthesis Further information from Beckman RITC Ltd Progress Road Sands Industrial Estate High Wycombe Buckinghamshire UK Tel 0494 41181 Circle No 39
17. an optional extra Enquiries to Stanton Redcroft Ltd Copper Mill Lane London SW17 OBN Tel 01 946 7731 Circle No 22 on Reader Enquiry Card Chromatography software GCDS is a chromatography analysis system which offers a range of capabil ities to give analysts automated measure ment of a chromatogram Providing unlimited storage of methods and chro matogram raw data and the flexibility of post acquisition processing GCDS is de scribed as out performing any computing integrator Designed to run on Apple H microcomputers the system was written New products to be easy to use requiring only a single key press for many entries After the initial creation of a method and the subsequent acquisition of the chromatogram raw data in real time the method can be tailored to suit the ac quired chromatogram without the need to rerun a sample The tailored version of the method can be stored and used for later acquisitions More information from U Sci Ltd they are a subsidiary of U Microcomputers and produce a range of products for the Apple at Winstanley Industrial Estate Long Lane Warrington Cheshire WA2 8PR UK Tel 0925 54117 Circle No 23 on Reader Enquiry Card HPLC data system At Laboratory 83 October London Beckman launched their model 450 their latest data system controller which is intended for use in HPLC as a methods development and automation centre for a wide range of research and in
18. can be modified at a later date with different detectors and injectors The versatility of the gas chromato graph is further extended by the range of accessories available These include the HS 6 automatic headapace sampler and the Model ATD 50 automatic thermal desorption system The new AS 300 auto sampler which can be installed directly onto the SIGMA 300 increases sample throughput and forms part of a cost effective automated GC system for routine applications For further information contact Perkin Elmer Ltd Post Office Lane Beaconsfield Buckinghamshire HP9 1QA UK Tel 04946 6161 FTIR application booklet An application booklet on the Perkin Elmer 1500 Series of Fourier Transform infra red spectrophotometers the Models 1500 and 1550 is now available The Model 713 from Laboratory Data Control U K Ltd The sample injector can be controlled remotely by laboratory controllers or computers and will perform with virtually any LC system After a briefdescription of the 1500 Series the booklet covers experiments that de monstrate the versatility of the instru ments in a wide range of applications areas from routine analysis to the most demanding analytical requirements of the modern laboratory Copies are free from Perkin Elmer above Circle No 19 on Reader Enquiry Card Field or lab pH meter thermometer A high specification digital pH meter and thermometer has been announced by Kane May The KM
19. clude an ad vanced engineered matching network automatic vacuum throttling control and mass flow controllers for four process gas channels Further information from UK TEGAL 7 Adam Square Bruce field Livingston U K USA TEGAL Corporation 11 Digital Drive Novato California 94947 USA Circle No 30 on Reader Enquiry Card ICP analysis Users of Philips emission analysis systems employing the Boumans inductively coupled plasma source can now make savings in the cost of analysis Philips are Offering a simple fast method of in serting merely a new torch tip instead of replacing the complete torch Very often accidents in the ignition of plasma in creasing the power during running or changing gas flows while operating will result in the melting of the top of the torch Furthermore the deposition of deleterious substances or the erosion of the top of the torch can alter the electrical characteristics of the plasma Inserting a new tip involves a down time of 10 min and costs a fraction of the price of a new torch Contact Pye Unicam Ltd at York Street Cambridge CB1 2PX UK Tel 0223 358866 for more information Circle No 31 on Reader Enquiry Card High speed centrifuges An illustrated brochure is available de scribing Beckman s J2 21 series high speed centrifuges they are all UK made The latest model J2 21 M is featured in the catalogue this is microprocessor controlled and has the advantage of
20. d Circle No 5 on Reader Enquiry Card HPLC autosampler The model 504 Beckman s new auto sampler can hold up to 102 samples and was designed so that the column is moun ted very close to the point of sample injection This optimizes the performance with high speed columns by minimizing peak broadening The 504 can inject 1 ul from a total sample volume of 104d sample volume is adjustable from 1 to 100 ul and the autosampler can store up to nine separate programs A time saving feature is that the 504 allows access to samples at all times so the first few samples can be loaded the system started and these samples analysed while loading is continued A unique washing feature allows trace anal ysis work to be carried out with minimum cross contamination The model 504 can be used in conjunction with Beckman liquid chromatographs and with those of other manfuacturers Details from Beckman RIIC Ltd Progress Road Sands Industrial Estate High Wycombe Buckinghamshire UK Tel 0494 41181 Circle No 6 on Reader Enquiry Card 48 Linear actuator Linak is a low cost linear actuator for 12 V and 24 V d c operation which was designed for linear movement require ments of both indoor and outdoor installations The stainless steel piston and the alkyd varnish treatment of the surfaces of all other parts ensure that the actuator remains free from dirt and water The outer surfaces are weather proof For open outdoor i
21. des com plete control of the stirrer bar when changing speed and after switching on when set at high speed The standard bench model provides the necessary circuitry to power two remote units outlet sockets are required for the remote units which are fitted to order A range of remote units is offered from a small low power unit for use in confined spaces up to a version which gives the same power output as the master unit More information from Townson amp Mercer Ltd Chadwick Road Astmoor Runcorn Cheshire WA7 IPR UK Tel 09285 76245 Circle No 11 on Reader Enquiry Card Dynamic gas blending The multichannel Dyna Blender is the third generation of Matheson s gas blending equipment It delivers on line premixed gases at different ratios regard less of temperature pressure or flow vari ations The unit features up to four chan nel blending capability a digital display and separate controls for each channel It also offers costs savings and space savings over modular systems without compro mising control accuracy and precision Each of the four channels can be controlled remain independent with a constant flow or remain idle with no flow Control of the channel can be by an external ratio of another flowstream by internal manual adjustment or by an external 0 5 VDC signal The digital LED display and the four channel set read switch allow the operator to monitor each channel one at a time as desired
22. dustrial applications for example phar maceuticals food chemicals oil and plas tics The system provides up to four channels of HPLC control independent multichannel data acquisition data re duction storage and management It is expected to be of special interest to labo ratories using more than one liquid chro matograph and is fully compatible with existing Beckman Altex modules and systems Special software packages include an option for storage and manipulation of spectral data from the Beckman Model 165 Detector providing more positive peak identification a user BASIC pack age and GPC calculations The operating system is disk based so new software updates can be undertaken easily at little additional expense The 450 has been designed for simple use by laboratory staff and provides more information on each analysis than 1s obtainable by manual methods Up to four chromatograms can be viewed on the CRT simultaneously and raw data and results can be stored on disk with produc tion of a hard copy print out when required As an HPLC control centre the system eliminates the need for individual pump controllers and integral autom ation allows unattended operation of other HPLC modules autosamplers and switching valves for example It has 160k bytes of RAM memory expandable to 288k bytes and features dual floppy disks providing 640k bytes of usable storage for methods and data Accessories include data channel
23. e part in 5000 and high precision balances accurate up to one part in 20 000 The line contains model No balance increments EB 500 500 g Oig EB 5000 5000 g lg PB 220 20 g 200 g 1mg 10mg dual range scale PB 2200 200 g 2000 g 10mg 100 mg dual range scale PB 200 200 g 1 mg PB 2000 2000 g 10mg PBC 2000 2000 g 10mg counting scale They are all mains powered and a glass wind break is available for use with 20 g and 200 g capacity machines Guaranteed for 12 months the balances range in price from 1000 to 5000 plus VAT Contact Salter Industrial Measurement Ltd at George Street West Bromwich West Midlands B70 6AD UK for more information Tel 021 454 9211 Circle No 46 on Reader Enquiry Card The GA44 thermal printer a significant improvement over manual recording of weighing results because it saves time and avoids transcription errors It can be connected to all Mettler electronic balances with serial data output Measuring values are printed out with the correct sign in front and the proper unit designation Appropriate parameters in each line assure automatic identification of all values The capacity of the GA44 is 20 characters line the transfer rate is adjustable in four steps from 110 to 2400 baud Details from Mettler Instrumente AG CH 8606 Greifensee Switzerland Circle No 47 on Reader Enquiry Card Cryostat A general purpose cryostat featuring a retracting micr
24. e capability as RIA does not use radioisotopes and as the reagents are totally harmless disposal problems do not exist separate laboratories are unnecessary and reagent loss from fast decaying isotopes are eliminated Further since the method is totally automated and runs at 60 samples h the clinician can obtain immunoassay results together with those for clinical chemistry and haematology so that correct patient treatment can begin earlier Technician time is significantly reduced and depending on the country can save the laboratory between 25 and 35 on immunoassay Given some 60 samples day a laboratory can pay off the cost of an IMPACT system in less than two years ACADE S A Brussels Automatic non isotopic im munoassay system ACADE S A was opened during 1983 by the Belgian Minister for Bud get Scientific Policy and Planning It will be the only company in Belgium to manufacture in struments for in vitro diagnostic testing Their first product is the IMPACT which uses PACIA technology and reagents to fully automate non isotopic im munoassays PACIA stands for Particle Counting Immunoassay IMPACT s re agents because they are non isotopic are safe and stable for at least a year All assays are completed within 1 h Dr H W Holy the company s Chief Executive Officer writes that the IMPACT is an important advance in design and tech nology and that it is fully tested and developed An ample stock of kits for T4
25. esign advance The continuous laboratory top in corporates two shallow Corian sinks for slide washing and staining two re moveable trays for staining pots with individually controlled extraction beneath and two flush perforated section cover clipping panels also re moveable with extraction beneath Corian is a solid product which cannot delaminate and is simply glued together to provide a seamless surface with com pletely impermeable joins Potential con tamination traps have been virtually eliminated and all areas can be kept clinically clean Staining agents are readily removed with ordinary cleaning materials It is available in sheet form in 6mm thickness for vertical applications or 13 mm and 19 mm thickness for horiz ontal use It also comes in a variety of moulded sinks and basins which can be bonded to become integral to an overall worktop More information UK from C D Richmond House 16 Blenheim Terrace Leeds LS2 9HN UK Tel 0532 439651 other territories Du Pont de Nemours International S A PO Box CH 1211 Geneva 24 Switzerland Circle No 2 on Reader Enquiry Card Process control At the Interkama exhibition in FR Germany which was held in mid November 1983 Fisher Controls dem onstrated a complete process control cap ability for the process and energy industries PRoVOX batch instrumentation was shown for the first time It features the co ordination of the batch cycle integrated d
26. etch ing the Plasma Inline 803 has been announced by the Tegal Corporation a subsidiary of Motorola Inc The 803 features two programmed channels for independent control ofall process variab les to provide the highest levels of etch repeatability The advantage of a single wafer oxide system lies in its ability to handle thickness variations from wafer to wafer that occur in batch processes for example oxide growth or silicon nitride deposition The Inline 803 etches anisotropically or produces sloped profiles for very large scale integration VLSI Throughput rates can exceed 60 wafers h depending on film type and thickness The process is compatible with most photoresists and selectivity to photoresists is typically 4 5 1 The 803 s reactor and its planar electrode produce a very concentrated plasma close to the surface of the wafer This ensures optimum etch rates and product uniformity The reactor electrode is removable for easy cleaning The unit has solid state 1000 W RF power supply a third channel for auto matic push button cleaning and a high speed microprocessor controlled wafer track Membrane switches actuate the primary controls and all read outs are digital There is also an automatic optical endpoint detection system with program med overetch for each wafer that detects less than 2 exposed oxide The system can accommodate all three standard wafer sizes 3in 100mm and 125mm Other key components in
27. f the oven to give all round access to the column connections The oven is compact but holds 2x 4m eighth inch o d metal or glass lined stainless steel columns 2x 2m quarter inch o d col 50 umns or a 1x4m system Isothermal single or dual ramp temperature programmed operation are possible with the addition of a sub ambient accessory the instrument can be operated down to 0 C to improve separations of mixtures containing volatile components A range of easily interchangeable de tector and injector modules is available There are six detector options for the 8310 single FID ECD NPD HWD dual FID and NPD FID the 8320 series has single FID ECD NPD and FID NPD options are available A choice of pneumatic control panels for the 8310 provides cost effective control for carrier gas and detector gas supplies while for the 8320 the specially designed pneumatics with electronic pressure read out on the screen allow precise setting of carrier gas supply even at very low flow rates The range of injectors for the 8310 series includes single or dual packed for tin or tin columns and a split splitless capillary injector the 8320 series of dedicated capillary chromatographs are available with split splitless and on column injectors For further information contact Perkin Elmer Ltd Post Office Lane Beaconsfield Buckinghamshire HP9 1QA UK Tel 04946 6161 Circle No 14 on Reader Enquiry Card Electrode system A
28. he SIGMA 3B it is a compact multi detector single or dual column instrument capable of handling a variety of samples There are seven detector options ECD FID HWD NPD FPD PID and the Hall electrolytic conductivity detec tor up to three detectors may be installed and operated simultaneously There is a choice of packed column split splitless capillary column and on column capil lary injectors Both packed and capillary injectors may operate simultaneously Automatic control of a gas sampling valve of the split splitless capillary injec tor is standard Packed injectors are supplied with both in and in fittings The SIGMA 300 offers two versions of flow control for packed column carrier gas a new low cost flow control or digital flow control There is also a choice of manual or automatic capillary pneumatics Optional RS232C compatible com puter communications allow parameters such as oven detector and injector tem perature to be set and monitored from an intelligent terminal or a large computer system This enables a network of SIGMA 300 units to be set up providing a cost effective means of implementing laboratory automation The 300 can be custom built to meet specific needs Alternatively precon figured units based on the most popular configurations are available a dual FID and FID HWD an ECD and an HWD for packed column operation plus an FID for capillary operation Any of these dedicated units
29. ined by connecting the machine to any pen recorder or to a printer plotter At the end of an analysis the data handling system can display results in the form of a peak table and allow post run manipulation of the data Via the graphics printer the user can recall the chromatogram to print in peak names and retention times on selected peaks Inexperienced users can be guided through the data handling system by prompts a short cut mode of operation is also possible Automated bleed compensation ABC has many advantages over the more generally used dual column balanc ing techniques for temperature programmed FID operation It mini mizes setting up time and reduces costs Once the column has been conditioned bleed correction is obtained by a simple calibration procedure After set up it is even possible to modify the temperature programme without _ re calibration Furthermore ABC can be used to tem perature program packed columns with specific detectors such as the electron capture or to program capillary columns at near maximum detector sensitivity with negligible base line shift The chromatograph is available in two series the 8310 for packed column operation and the 8320 for dedicated capillary systems The 8300 s oven is optimized for capil lary column use but is equally suited for packed columns Unusual accessibility is achieved by a unique design of analyser which slides forward pulling the columns out o
30. iscrete and regulatory control complete recipe handling easy operator interface and complete process management Up to 20 recipes can be stored in the PRoOVOxX batch console and a further 125 on disk recipes are downloaded to con trollers allowing rapid change of feeds grades and even types of product PROoOVOX batch is intended for appli cation in the chemical and phar maceutical industries and in food and beverage processing Another new product was the DV series Vortex flow transmitter a rugged instrument that measures volumetric flow of liquids gases and superheated steam Fisher Controls claim that it provides the accuracy ofa turbine or positive displace ment flowmeter yet offers the many fluid applications simplicity of calibration and economical advantages ofan orifice plate flowmeter Also shown for the first time in Europe was the Type 2390 liquid level transmitter which is mounted on the established 249 series LEVEL TROL dis placement sensor The transmitter fea tures ease of calibration in that the zero span and dry span calibration adjust ments can all be done externally even in hazardous areas The use of Hall effect sensing gives clean noise free signals and enables the measurement of small specific gravity changes permitting its use in density and other applications requiring low levels of input signal change Reader enquiries to M W Mason Sales Director Fisher Controls Ltd B1 Century Works
31. lance has four built in weighing modes 0 01 to 400g 0 001 to 14 avoirdupois ounces 0 1 to 6173 grains and 0 0001 to 0 88 avdp pounds resolution to 0 01g and a 3s response An optional interface box and cable permit connection to any RS232C compatible computer or printer for automatic print out The balance can be commanded to tare weigh or change functions by remote computer control also to count parts determine weight gain or loss percentages and give a read out in any user defined units Fisher describe the balance in their Bulletin No 674 copies from Fisher Scientific Company 711 Forbes Avenue Pittsburgh Pennsylvania 15219 USA in Canada contact Fisher at 112 ch Colonnade Road Neapean Ontario K2E 7L6 Circle No 9 on Reader Enquiry Card Dual range balance Bulletin No 639 describes another new Fisher Ainsworth product model LC 5500 It offers dual range capability with weighing to one part in 50000 in either range it can be a workhorse 5000 g balance with 0 1 g resolution or a sensitive 500g balance with read out to 0 01g Copies of the Bulletin from Fisher above Circle No 10 on Reader Enquiry Card New products Stirrer The T amp M electronic stirrer has a speed range of 200 to 1000 rpm it is motorless and cannot stall at any speed Speed control is provided by voltage regulated circuitry and a speed indicator it is recommended for repetitive tests Automatic acceleration provi
32. le PC boards master program disks connecting cables and a user manual Details from Micromeritics Instrument Corporation 5650 Goshen Springs Road Norcross Georgia 30093 USA Tel 404 448 8282 Circle No 21 on Reader Enquiry Card DAPS A data acquisition and processing system has been developed by Stanton Redcroft Ltd for handling thermally derived data DAPS 2 can monitor store and display data from four sensors with a resolution 20 times greater than conventional chart recorders it can also plot expanded por tions or the entire results as graphic colour curves on A4 sized paper The data collected can be manipu lated on a video screen to obtain a detailed understanding of thermal events In addition analysis programs included in DAPS 2 offer automated calculation of a wide range of thermal parameters from results obtained with thermobalances TG differential thermal analysers DTA differential scanning calorimeters DSC thermomechanical analysers TMA and instruments that combine the functions of a TG and DTA or a TG and DSC The system is based on a Commodore PET 4032 which collects test variables via a four channel IEEE 488 Data Acquisition Unit with a resolution of 1 20000 This high resolution reduces the need for preliminary experiments for 52 example to determine approximate weight losses or the dynamic range of DTA peaks Raw data are simultaneously stored on a high speed digital tape re co
33. lectrodes In an attempt to expand the number of methods for ion selective electrodes into New products new areas Orion are running a com petition for their customers So every customer supplying a new method that they have developed themselves will as long as the method is accepted get a free electrode the model 97 08 is excluded Acceptance will be based on two things 1 The method must be new 2 The method must be applicable to other users Methods to Mrs S M Chick MSE Instruments Manor Royal Crawley Sussex RH10 20Q UK New methods Orion s Technical Services Group have announced six new methods available from MSE in the form of technical service notes Nitrate waters pH of water samples these notes dis cuss the typical problems encountered and what to do to solve them Soil pH three methods are given along with recommendations for electrodes Calcium in feed stuffs an important measurement for determining a key nutrient Acidity and alkalinity determinations an ideal application for the Ross electrode Titrations for silver in photographic solutions in potable and ground Ammonia Orion have released a new ammonia electrode which carries a two year war ranty The 95 12 is a precision manufactured device offering greater reli ability and smaller in size than the old design Smaller samples can be measured even in test tubes The simplified as sembly eliminates
34. n is able to separate samples two to three times faster than conven tional analytical columns and improves resolution There are three types of column ODS C18 C8 and SIL silica 47 New preducts The high performance of Golden Series columns apparently results from the in herent properties of Du Pont s Zorbax particle which is specially designed for high performance liquid chromatog raphy While the efficiency of a column rapidly increases as the diameter of the packing particle decreases the problem with 3 um particle has been poor particle size control leading to a broad size distri bution These liabilities result in excessive backpressures and decreased column life times With Zorbax technology Du Pont have created a spherical mechanically strong particle with narrow size distribution the company maintain that these properties under a unique tightly controlled manufacturing process The columns are shorter 8cm but wider 62mm i d than a standard column of the same sample capacity this internal volume allows use of standard injectors and detectors and no sensitivity is lost due to either decreased sample size or detector cell path length So Golden Series columns do not require highly specialized LC components The new column also operates effect ively at both elevated and ambient temperatures Further information from Du Pont de Nemours International S A PO Box CH 1211 Geneva 24 Switzerlan
35. nstallation the actuator is provided with a rubber mantle for ad ditional protection It is maintenance free and protected against mechanical over load It can be controlled by either a double pole rocker switch or an elec tronic end stop switch Both of these types of control unit eliminate the need for end stop this results in definite sav ings in addition to the fact that only two electric leads are required for the actuator A built in potentiometer permits automatic positioning The poten tiometer is synchronized to the move ments of the piston which ensures that the piston s movement is under control throughout the entire stroke The poten tiometer and the servo control system mean that positioning accuracy of up to 0 1mm is attainable The range of Linak linear actuators provide a thrust of up to 3000 N and speeds of up to 39 mm s Standard strokes range from 50 to 400 mm The manufacturer is Unimatic Engineers Ltd Granville Road Works 122 Granville Road London NW2 Tel 01 455 0012 Circle No 7 on Reader Enquiry Card Ultrasound in chemistry Polysonics s USA Doppler ultrasonic flowmeter systems are to be sold in the UK by Gendeal Ltd The systems are capable of measuring flow rates in full pipes from 1 upwards they are non invasive and can be fitted quickly to all materials bar rubber and concrete They are suitable for measuring the flow of slurries waste effluents cooling water spent acids
36. nt ration can be swiftly performed with automatic subtraction of solvent blank values In excitation and emission scan modes the SFM 25 can be used to determine optimum wavelengths for quantitative analysis and characterize un known substances Synchroscan greatly assists the identification of organic com pounds and the spectrum produced can serve as a fingerprint for complex mix tures such as raw oil Two basic versions of the spectrofluorometer are available one with a four cell holder and one with a flow cell for HPLC The HPLC flow cell holder has high sensitivity low response volume and ideal flushing characteristics mounted on its own base it is easily removed for cleaning Thermostatted cell holders are also offered for biological applications of fluorescence where they can improve both sensitivity and reproducibility Standard to all of the spectrofluorom eters is an RS232C interface This is bi directional and allows for the print out of parameters and results as well as full outside control Baud rate parity and format are all set up via the SFM 25 s keyboard Further details from Kontron Analytical PO Box 88 St Albans ALI 5JG Hertfordshire UK Tel 0727 66222 Circle No 45 on Reader Enquiry Card Balances Salter Industrial Measurement Ltd a subsidiary of Stavely Industries PLC offer a number of electronic precision balances the range has two basic categories balances accurate up to on
37. ograph ers to enjoy the benefits of the Group and hopefully advance their careers More information about this scheme and about the Group s Meetings Abstracts and Symposia from the Chromatography Discussion Group Trent Polytechnic Burton Street Nottingham NGI 4BU UK Circle No 17 on Reader Enquiry Card New products Microprocessor based automatic sample injector for liquid chromatography Designed for unattended repetitive auto sampling as well as fast single sample injections the LDC Milton Roy Model 713 was launched at the end of August The 713 can inject 60 samples with up to three injections per vial giving a total of 180 possible injections It greatly reduces the amount of sample required for injec tion just 1001 is required for a 10 ul injection The 713 is simple to operate with a data entry system featuring an LED visual display coupled to a keyboard Programmable functions in clude cycle time last bottle to be sampled flush time injections per vial and timed external commands The sample injector is offered with a choice of injection valves the Rheodyne 7010A 7126 and 7410A sample loops of OSul to 200ud are available Details from Laboratory Data Control UK Ltd Milton Roy House High Street Staffordshire ST15 SAR UK Tel 0785 813542 Circle No 18 on Reader Enquiry Card Perkin Elmer GC SIGMA 300 has been added by Perkin Elmer to their range of gas chromato graphs Based on t
38. on Reader Enquiry Card Electronic balance Launched at the Weightec Exhibition Sartorius s Ultra Micro Balance the 4504 MP8 offers a weighing range of 120 mg to a readability of 0 1 mg Dial in weights take the total capacity up to 402g Features include remote motorized pan extractor and zero extra wide weighing range full electronic tare automatic cal ibration standard RS232 data output self checking diagnostic sequencing and operator set operating parameters These are possible because the balance includes the MP8 microprocessor de veloped by Sartorius and which contains all the primary and secondary functions A major advance which the MP8 pro vides is an almost unmatchable stability of read out Full details from Sartorius Instruments Ltd 18 Avenue Road Belmont Surrey SM2 6JD UK Tel 01 642 8691 Circle No 40 on Reader Enquiry Card Sartorius s Ultra Micro The balance is recommended for industrial analysis in research and development as well as for monitoring working conditions for airborne pollutants New products The first totally automated non isotopic immunoassay system with a sensitivity and range equal to that of radioimmunoassay Some 85 of all immunoassays today are performed using radioisotopes Safety regulations now being drafted in Europe and USA which could price radioimmunoassay out of the market in spite of its enormous diagnostic value The IM PAC T system with the sam
39. oniston Road Linslade Leighton Buzzard Bedfordshire LU7 7QY Tel 0525 381569 Circle No 33 on Reader Enquiry Card ChemLab Model CCM 1 chloride meter This all British machine provides a fast accurate digital read out of the chloride New products oai ie te cee NS ET RTE PN SIO AE SO I SO a a a E a OC I SL a SE RE ELD TE a concentration in biological samples such as serum plasma sweat CSF and urine It is a small compact instrument with simple controls Up to 20 samples can be measured in one aliquot of acid buffer solution an integral warning light indicates when the chloride concentration of the solution has reached the 2000 mmol l level and needs replacing The CCM I is supplied with electrodes detectors pipettes stirring bars and an initial supply of standards reagents electrode polish and beakers U K price is 895 Details from ChemLab Instruments Ltd Hornminster House 129 Upminster Road Hornchurch Essex RM11 3X J UK Circle No 34 on Reader Enquiry Card Pipette tip The range of precision pipette tips available from Elkay Laboratory Products UK Ltd has been extended to include cadmium free tips Specifically designed for use with Pipetman Liquid transfer pipettors the tips fit models P 20 P 100 P 200 and F up to 200 wl To correspond to the pipettor manu facturers specification the tips which have a capacity of 1 200 ul are coloured yellow They are packaged in the Elkay Conve Rack
40. otome and a wide self defrost chamber is available from Slee s Laboratory Equipment Division it s called the HR cryostat The R2 rotary microtome is extremely rigid completely rust proof and designed to be self compensating to keep it in dependent of any temperature variations It has stainless steel frictionless bearings and enables sections to be precisely cut from 1 to 25 um The self aligning easy to adjust guide plate ensures flat uniform and crease free sections An important feature of the HR cryos tat is balanced manual drive with a safety lock on the top of the stroke for the microtome The chamber with its large clear view window and access port enables relaxed user operation whilst the circuitry and component layout of the cooling system ensure reliability A hermetically sealed compressor gives a range of 0 to 35 C dependent upon the refrigerant gas employed and ambient temperature With a voltage requirement of 240 110 V and 50 60 Hz operation the HR cryostat is recommended for routine histology research or teaching and for cutting all types of histological cytolo gical and technological materials Accessories include a bench freezer and tools for rapidly freezing specimens microtome knives and a range of speci men holders Details from the Slee Group s Laboratory Equipment Division Lanier Works Hither Green Lane London SE13 6QD UK Circle No 48 on Reader Enquiry Card Free e
41. rder which acts as a non volatile exten sion to the computer memory and dis played continuously on the VDU At the end of each test run data is transferred to the disk system where it is permanently stored for future reference Whilst the selected plot is displayed DAPS 2 offers two further choices of expanding regions of interest by use of a movable cursor on the VDU and printing the expanded region or the entire plot on a Houston Instruments HIPLOT EDMP 4M443 A4 six colour graphics plotter Hardware is compatible with Stanton Redcrofts STA 780 TG 760 TMA 790 and DTA 670 series of instruments The DAPS 2 allows the collected data to be manipulated in a variety of ways for example in the determination of peak temperature extrapolated onset and offset times and temperatures weight loss percentage peak area integration peak shoulder identification and TG buoyancy correction routines In addition the software package can be used for more specialized applications such as oxidative inductive stability per centage crystallinity degree of cure glass transition temperatures and identifi cation of maximum temperatures in highly exothermic reactions A pack of 10 floppy disks supplied with the system offers sufficient memory storage for records of approximately 400 tests to be kept on file For installations where a stable mains supply is not available a voltage stabilizer interference suppressor can be provided as
42. s instru ment control channels a bi directional RS232C port and a pneumatics interface Details from Beckman RIIC Ltd Progress Road Sands Industrial Estate High Wycombe Buckinghamshire UK Tel 0494 41181 Circle No 24 on Reader Enquiry Card Gas chromatograph When Analytical Instruments Ltd was set up in 1967 the basis of the business was to exploit detectors developed for gas chro matography and to use them in special purpose instrumentation These products have incorporated the thermal conduc tivity detector for leak detection and atmosphere monitoring the electron cap ture detector for leak detection atmos phere monitoring and specialized vapour detection systems and thermionic ion emission for refrigeration gas detection The company is probably the largest manufacturer in the world of electron capture detectors over 10000 have been made AI entered the gas chromatography market three years ago with the AI 90 Gas Chromatograph and has now introduced the AI Model 92 The AI 92 is announced as having outstanding thermal performance in terms of temperature control minimal column oven gradients rapid cooling and reproducibility of temperature prog ram profiles Much attention has ap parently been given to design user con trol for example is via a keyboard allow ing immediate commands to be executed in the same way as a knobs and dials instrument but with the benefit of pre programmed analysis rou
43. t monitor output is provided Remote ap plied voltage ripple and transient re sponse monitoring a c coupled 330 pf and 10meg viewing circuit is also provided The instrument is 12inH x 8inW x9inD and requires 115 230 V 50 60 Hz switch selectable power The HVL 25 electronic high voltage load is available off the shelf Full information from Bertan at 3 Aerial Way Syosset New York 11791 USA Tel 516 433 3110 Circle No 28 on Reader Enquiry Card Microbiological growth analyser A number of trade shows are being used to demonstrate System 11z a microbiological growth analyser The analyser provides an automated standardized method for detecting the presence of micro organisms by monitor ing the change in conductivity caused by their growth in a suitable medium Data is collected stored and processed and dis played on a VDU printer or chart re corder Software is available to enable blood urine and other biological fluids to be analysed easily and quickly Detection of growth is generally faster than by conventional means The system uses conventional media and autoclavable sample cells in 2 10 and 100 ml capacities The power supply cannot be interrupted Details from Malthus Instruments Ltd William Clowes Street Burslem Stoke on Trent ST6 3AT UK Tel 0782 817628 Circle No 29 on Reader Enquiry Card 54 Oxide etcher A single wafer cassette to cassette plasma processing system for oxide
44. the Beckman ultra smooth induction drive providing high torque for faster acceler ation and a more rapid throughput than has previously been available on the J2 2k The brochure also includes details of the J2 21 itself and there is a special section on the wide range of standard and special rotors offered by Beckman Copies from Beckman RIIC Ltd Progress Road Sands Industrial Estate High Wycombe Buckinghamshire UK Circle No 32 on Reader Enquiry Card Mobile centrifuges Intended for the chemical phar maceutical and nuclear industries as well as all types of scientific laboratories a new range of trolley mounted vertical axis centrifuges from Rousselet can be supplied with a plain bowl perforated basket filtration bag and basket or sets of test tube buckets They are mobile and have multi use potential as driers de canters or separators Special bowls are available for high pressure vacuum or sterile processes The hydraulic pack and controls mounted on the trolley with the centrifuge allow speeds to be varied from 0 to 4000rpm The bowl or basket and the outer shell of the centrifuge can be made of stainless steel or hastelloy and plated both inside and outside in lead ebonite rilsan teflon halar or kynar All specifications are available in two bowl diameters 40 and 50cm 4 and 5 S5kW electric hydraulic drive Weights are typi cally 650 and 850 kg Enquiries in UK to Rousselet et Cie S A 20 C
45. tines For further details contact Analytical Instruments Ltd London Road Pampisford Cambridge CB2 4EF UK Tel 0223 834420 Circle No 25 on Reader Enquiry Card GAMBICA The association for the instrumentation control and automation industry in the UK GAMBICA is reviewing its criteria for membership in order that non British manufacturers will be able to join The association s president Bob Eade Chief Executive of Thorn EMI Technology believes that the change is important because the business is becoming increas ingly international and all companies having an important place in the UK economy can be involved with the collec tive voice of the industry Information about this and about the association s other plans from Desmond Cavanagh GAMBICA amp Leicester Street London WC2H 7BN Tel 01 437 0678 Circle No 26 on Reader Enquiry Card Flow Measurements Using fluorescent dyes with a modern fluorometer provides an effective tracer system with the advantages of rapid accurate and easy use in the field Techmation is offering a revised expan ded version of the Turner Designs mon ograph Flow Measurements a practical field guide for on site measuring An earlier edition of the booklet was de scribed by the EPA as a particularly valuable reference Time of travel studies channelling detection weir and flume calibration and sewer system infiltration can be done in the field
46. w optical design minimizing thermal and flow noise without a heat exchanger A tubular 1 mm bore fused silica cell permits direct coupling to 1 mm bore columns for maximum chromatographic efficiency Special fibre optics and a high performance mirror direct light through the cell on to an integral pre amplifier circuit board The microCell has a low noise specification less than 4x10 Au at 220nm It can be retrofitted to spectroMonitor variable wavelength detectors alternatively the spectroMonitor D can be purchased with a factory installed microCell Details from LDC Milton Roy House High Street Stone Staffordshire ST15 8AR UK Tel 0785 813542 Circle No 53 on Reader Enquiry Card Four standard models of the BINOS infra red gas analyser are available to the photosynthesis researcher and all four have appropriate infra red optics to maximize accuracy and sensitivity Each model is portable and works on 12 Vd c or 120V a c heated optics are not required The models feature analogue or digital display of the measured component and provide a 0 to 1 V recorder output signal over the measured range Tekmar USA 60 International Journal of nedi Chemistry International Journal of Carbohydrate Chemistry The Scientific World Journal Organic Chemistry International lt e International Journal of Analytical ISIE ey A a Advances in Physical Chemistry
47. with a Turner Model 10 fluoro emeter and tracer dyes Theory equip ment and potential problems are dis cussed in detail Basic equations are pre sented and explained and reviews of the latest references on the subject are included Free copies from Techmation Ltd 58 Edgware Way Edgware Middlesex HA8 8JP UK Tel 01 958 3111 Circle No 27 on Reader Enquiry Card Model 92 a British designed and built high performance gas chromatograph from Analytical Instruments Ltd 53 New products Bertran introduce high voltage electronic load Bertran have announced a high voltage test instrument for laboratory or inspec tion use which provides a convenient way of measuring load regulation ripple and dynamic response of power supplies de livering up to 25kV at 3mA The remote programming and monitoring features allow for integration of the new HVL 25 into automatic test equipment systems The instrument can be operated in several current modes including d c operation at either of two current levels square wave switching between the two current levels at line frequency or switching between the two current levels at an externally gated frequency Current is controlled using two high voltage vacuum tubes a dynamic load balancing circuit eliminates any require ment for expensive selected matched pairs and assures reliable performance In addition to the front panel average current meter a remote average curren
48. withdrawable steam sterilizable elec trode system for pH measurement of industrial fermentation processes has been introduced by Kent Industrial Measurements The stainless steel EIL Model 2890 is designed for use in sealed vessels at pressures up to 11 25 kgf cm and at temperatures up to 150 C or vacuum vessels with a maximum operat ing vacuum of 0 105 kgf cm It features a withdrawable valve mounting assembly which enables the electrode to be re moved from the reaction vessel or pipe and changed and sterilized in its own housing without interrupting the process The holder is withdrawn by an operating screw on the outside of the assembly In the withdrawn position the electrode is completely sealed in the housing and a jet of steam is introduced via a port in the base of the holder The holder consists of an electrode stem holder with optional electrode guard and an upper chamber featuring a sight glass arrangement for checking the electrolytic level of the electrode Connections for an air supply and pressure gauge allow pressurization of the upper chamber to 2 psi above the sample pressure at the electrode tip The electrode used is Kent s 1170 combination pH glass electrode It 1s supplied filled with glycerol potassium chloride electrolyte together with spare top up solution A glycerol based sol ution is used to stop the reference solution boiling during sterilization To minimize errors in pH measure
49. y of the features of Mapco s model 6180 whilst consider ably reducing the cost The analyser will control the concentration of acids salts bases alcohols polymer reactions and other binary organic and aqueous sol utions to within a hundredth ofa percent The 6380 is provided with a standard temperature compensated 4 20mA iso lated output and is packaged ina NEMA 4x fibre glass enclosure Transducer as semblies capable of withstanding tem peratures up to 260 C and pressures up to 3000 psi are available in stainless steel Carpenter 20 Hastelloy B Hastelloy C and Titanium More information from Mapco Controls Company 11391 East Tecumseh PO Box 21418 Tulsa Oklahoma 74121 USA Tel 918 438 1010 Circle No 51 on Reader Enquiry Card Monitoring photosynthesis Precise determination of changes in carbon dioxide and water vapour levels in plant chambers is possible with the BINOS infra red gas analyser The measurement range is 25 ppm CO ata nominal reference point value of 330 ppm CO It also measures absolute CO typically 0 to 600 ppm and absolute and differential H O 0 to 1 as an absolute range and 0 to 5000 ppm as a differential range Further information from Tekmar Company PO Box 371856 Cincinnati Ohio 45222 USA Circle No 52 on Reader Enquiry Card ENERRY Di AB SERO g OR The microCell fluid cell by LDC Milton Roy is designed for microbore HPLC applications It features a unique cross flo
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