Soil Moisture Measurement
Contents
1. 50HZ Digital state 1 Delta T WET sensor channel PNE Unlimited virtual channels emaoun _ 2ryoupaseoaao o6 A pe ewes ews Recording rato isoro zaros raorao zaan isona zaron rooz Configuration Configuration DetaLiNK Ls2wWn Communication en or modem a USB RS232 USB 1 RS232 USB I RS232 USB options or modem or modem Sensor excitation Calibrated 3V reference 5V and 2 relay switched 1 switched logger 1 switched logger 1 switched battery 12V regulated or 5 to 10 5V logger or external power power battery or external power user power 1 5V precision reference selectable 6 AA alkaline batteries or external 6 AA alkaline batteries 6 AA alkaline 1 9V 6LR61 PP3 1 9V 6LR61 PP3 power 10 15V DC or external power 7 batteries alkaline or external alkaline 15V power 11 24V Battery life 300K readings 6 months 1 year 1 year 5 000 readings dependent on e C a A C aon 10DXT6OATONM HOXTOSKAENM 125x80 A0T Typical applications Demanding research projects e General data e Monitoring soil e Monitoring soil e Instantaneous e Environmental monitoring logging for moisture profiles moisture reading of soil e PID control applications moderate to e Controlling e General data logging moisture profiles complex systems irrigation e Controlling irrigation WET Sensor Sensor maximum number of sensors that could be a GP2 0 De 6 with So 12 without temp a O with v 1 CA2. The GP2 s 6 internal AA batteries are sufficient for 300k readings External power 10 15V DC 2A can be connected if required Delta T can provide complete systems including enclosures batteries and solar power see page 17 An optional mains adapter is also available type GP2 PSU a L fr fy ar ry pa fr fr A A ga Oat f oar q gt _ WUE EEE EUs WAGE Fw Data can be collected on site by laptop via USB RS232 or remotely using the GPRS modem options see page 17 for further details Up to 7 GP2 loggers can be networked to create efficient and flexible monitoring and control systems Networked GP2s share communications and power via an M12 cabling network see Ordering Information Specifications ee page 19 GPRS BX1 SP modern box solar panel not shown Control Up to 6 Independent experiments or zones can be controlled and monitored concurrently Control conditions can range from simple thresholding to sophisticated calculations using the Script Editor Control parameters e g target soil moisture level can be adjusted throughout an experiment without interrupting data logging The number of control relay outputs can be increased from 2 to 6 using the optional Relay Expansion Module W ag P A es LE ee ee iwal alava atvaltaaat hula a UI VA i I WwW f I l 0 i la q LOA hi GP2 Data Logger Advanced Data Logger and Controlle
3. The tensiometers require a stabilised 10 6V DC 1 8mA power source A GP2 Data Logger can power and log up to 12 tensiometers Alternatively a GP1 fitted with 1 or 2 GP PBA X50 boards can log 1 or 2 tensiometers When more than 12 tensiometers need to be connected to a single data logger the DL2e Logger is available see page 18 For use in drier soils lt 160 kPa or at remote sites the Equitensiometer should be considered Sensor Type EQ3 SWTs EQ3 Equitensiometer e Convenient accurate reliable alternative to water filled tensiometers e Excellent range O to 1000 kPa e Maintenance free no refilling or degassing e New built in temperature measurement e New extendable cable system The EQ3 next generation equitensiometer has extra features and a new look With maintenance free operation and a wide measurement range it continues to be an excellent choice for reliable matric potential measurement but now also measures soil temperature The EQ3 uses class leading ThetaProbe technology to avoid the many problems of water filled tensiometers It provides an accurate loggable output making it suitable for environmental monitoring particularly in dry soils The EQ3 incorporates soil temperature measurement It also features a detachable cable system enabling easy changing of cable length The EQ3 is ideally suited to static long term monitoring of matric potential and soil temperature It can
4. accuracy sensor High quality sensor suited to Measures pore water conductivity moisture content recognized as the gold standard for research and a cost effective and temperature directly within soils and substrates It the precise determination of soil alternative where ML3 accuracy is has crucial applications in precision horticulture and soil moisture content Also provides soil not required It combines soll science research temperature when fully buried moisture and temperature measurement when fully buried Soil water content Soil water potential SM150 vV PR2 Volumetric water content Volumetric water content Soil water potential matric Soil water potential matric potential and m potential soil temperature 0 03 m m 3 0 04 m m 4 0 5 kPa 10kPa over 0 to 100kPa With soil specific calibration 10 of reading over 100 to 1000kPa 0 5 C 0 to 40 C for temp sensor 0 to 1 0 m m but less accurate Full accuracy over above 70 vol 0 to 0 4 m m SWT4 SWT4R and SWT5 0 to 1000kPa 10bar 100 to 85 kPa SWT5x 100 to 160kPa Full range O to 0 6 m m 50 to 1000 mS m 50 to 400 mS m No significant effect Suitable for all non saline soils 0 to 50 C 0 to 40 C 0 75 C 20 to 60 C for temp sensor Figures exclude logger or cabling errors 1mV kPa 0 1 0V differential non linear Calibration data and graph supplied with each sens
5. enclosures are required The internal alkaline battery lasts for gt 1 year when taking hourly readings from 2 moisture sensors 2 temperatures and a raingauge The GP1 can be fully configured connections checked data collected and readings displayed in the field using a notebook PC The WS GP1 a complete GP1 based weather station is also available Versatile and dependable The GP1 is well suited to logging ML3 SM300 SM150 and WET sensors It is also compatible with other analog environmental sensors including RH temperature light and sunshine duration rainfall and flow rate In addition tensiometer and bridge sensors can be logged using the optional GP PBA X50 bridge adapter board Application Areas e Monitoring soil moisture e General data logging e Controlling irrigation Accessories The GP1 is available with a wide range of accessories and communication see page 17 options including GPRS modem systems and cable network options WET Sensors amp tensiometers The GP1 can take readings from a WET Sensor recording water content EC and temperature The GP1 s voltage input channels can read 1 or 2 pressure transducer tensiometers using 1 or 2 optional GP PBA X50 bridge adapter boards Ordering Information GP1 Data Logger including DeltaLINK PC software and RS232 cable GP1 MP1 Mounting Kit with fittings for 51mm tube or flat surface GP1 LID2 Expansion Lid providing 4 further cable
6. fully enabled for the WET Sensor so the system may be configured to control water content and or EC or temperature using powertul built in control capabilities Brief Specification full spec on page 12 Measured parameters Permittivity 1 to 80 2 50 O to 300 mS m 10 ECb Bulk conductivity Temperature 5 to 50 C 1 5 C Calculated parameters Volumetric Soil Oto 100 3 f Moisture Pore water conductivity see graph below ECp Other specifications Individual sensor calibrations stored within sensor EEPROM ode femms 1 Permittivity is a measure of the dielectric properties of materials e g soils and substrates 2 Soil moisture accuracy refers to errors after applying a soil specific calibration within 10 C of calibration temperature Yield and Quality of Tomatoes v ECp Calibration Output Environmental Power Yield Quality Lower Quality Reduced Yields Optimum EC levels 5 Pore water conductivity ECp mS cm For portable applications the WET Sensor is used with an HH2 Moisture Meter and is normally supplied as a complete kit see Ordering information WET KIT WET 2 d WET 2 w WET 2 K1 WET 2 K4 Sensor with 1m cable and 25 way D socket for use with HH2 Sensor with 5m cable terminating in bare wires for use with GP1 or GP2 WET Kit including WET 2 d HH2 Moisture Meter manuals and carrying case As WET 2 K1 Kit plus WET GH1 subst
7. measurements of substrate moisture content e 3 accuracy e Good temperature and salinity stability e Easy data logger connection O to 1V DC Affordable precision The SM150 enables growers to monitor the moisture status of 1000 s of plants daily It is particularly easy to insert without damaging roots or disturbing the growing medium and partnered with the HH150 provides a simple effective low cost solution to checking the uniformity of growing conditions Data logging and readout The SM150 Soil Moisture Sensor is compatible with all Delta T Devices Loggers and its O to 1V DC output can be handled by most other types of data logger The SM150 is compatible with the HH2 Moisture Meter but due to the HH2 s higher cost it tends to be used only if PC connectivity is needed Applications e Horticultural production The SM150 is tough enough to be used all day every day in busy growing environments Monitoring and control The SM150 is designed for long term burial as well as hand held use and can be used with the GP1 or GP2 Data Logger for smart irrigation control The built in connector makes it quick and simple to switch between uses Landscape The SM150 is ideal for sampling the water content of pot grown plants to detect dry spots and ensure that the benefits of RDI are delivered Plant nurseries With the GP1 or GP2 logger the SM150 can be used in smart irrigation control systems Calibra
8. ordered as part of a convenient kit see pages 3 or 7 USB to RS232 Adapter Cable type USB RS232 100cm cable connects 9 pin RS232 to USB for connection to PC Brief Specification further specs on page 19 Range Zero to saturation soil water content O to 1 5V voltage range Accuracy 0 13 of mV reading mV Reading storage Typically 500 to 1500 readings depends on sensor and settings Connection 1 x male 25 pin D connector used for sensor and RS232 communications Environmental IP54 O to 40 C operating Size weight 125 x 80 x 40mm 450g Battery type life 9V alkaline 6LR61 PP3 5 000 readings NB The ML3 or SM300 can be used as a portable moisture probe with the HH2 Meter but the HH2 does not provide temperature indication from the SM300 or ML3 Soil Water Potential matric potential e Loggable water filled pressure transducer tensiometers e Maintenance free wide range Equitensiometers Tensiometers type SWT4 SWT4R and SWT5 These precision water filled ceramic cup tensiometers have good accuracy 0 5 kPa over the range 100 to 85 kPa 100 to 160 kPa for SWT5X SWT tensiometers require refilling and degassing after dry periods and must be protected from frost SWT4 and SWTA4R have improved performance and better frost resistance The SWTAR refillable version can be filled and emptied in situ The SWT5 is a miniature version that can be used for plant pots etc
9. to GP1 GP2 or DL6 loggers SMSC Iw 05_ 5m cable terminating in bare wires for connection to DL2e SMSC d HH2 90cm cable M12 to 25 way D socket for connection to an HH2 Meter EXT 5W 01 1m 5m 10m and 25m EXT 5W 05 extension cables M12 EXT 5W 10 connectors EXT 5W 25 ML EX50 0 5m extension tube SM AUG 100 Spiral auger 45mm diam Installs ML3 SM300 or SM150 at depth length 1 2m The ML3 ThetaProbe measures soil moisture and temperature with class leading accuracy e Soil moisture with 1 accuracy e Built in temperature measurement e Simple data logger or meter connection e Extendable cable system e Buriable IP68 Exceptional performance The ML3 ThetaProbe s class leading 1 accuracy stability build quality and reliability have made it the oreferred choice of thousands of researchers worldwide The ML3 is easy to use Simply insert Intro amp ML3 ThetaProbe the probe into the soil connect to your Brief Specification Ordering Information data logger or meter provide 5 14V DC full spec on page 12 ML3 ML3 ThetaProbe Sensor at 18mA and within seconds you can Water content NB Order cable separately be accurately measuring soil moisture i Accuracy l ML3 Includes ThetaProbe type A built in thermistor enables the ML3 to z ThetaKit ML3 4 spare rods HH2 simultaneously measure soil temperature ange Meter USB RS232 and soil moisture at depth A new Temperature adapter cable in
10. with a 1 5m cable and connector A connecting cable must be ordered with each SWT Lengths of 5 10 and 20m are available 1 SWT4 tensiometers can be fitted with other shaft lengths minimum 20cm up to 211cm max 2I SWT5 can be fitted with shaft lengths 2 to 20cm w SM300 5 7 EP pe E J a d li J es a EE h J ae y i v F po N 2 _ s ay w da p E Q n x a E g il K gt A q fa 7 d The PR2 Profile Probe provides easy and accurate soil moisture profiles e Soil moisture content not just trends e Low Salinity and temperature sensitivity e Portable meter option for multi site measurement e GP2 and DL6 Logger options for continuous monitoring Dual purpose The unique PR2 Profile Probe can be installed for continuous data logging and can also be used for multi site portable measurements with an HH2 hand held readout unit The PR2 uses patented sensing technology making it possible to measure soil moisture content in a range of soil types and across a wide range of nutrient levels including saline soil conditions Applications e Soil moisture profiles e Agriculture e Hydrology e Civil engineering Installation and connection Users can choose between the PR2 4 measuring at 4 depths down to 40cm or the PR2 6 measuring at 6 depths down to 100cm The nominal sensing depths are 10 20 30 40 60 and 100cm Profile probes are used in access tubes inserted into auge
11. Delta T Devices Leaders in Environmental Measurement f AA 4 N s i ae oil Moisture pais Measurement E a E 4 P a i Yi Delta T Devices Company Profile Origins Established in 1971 Cambridge based Delta T Devices specialises in instruments for environmental science in particular for soil science agronomy plant science data logging meteorology and environmental monitoring Delta T is a co operative company owned and managed by the members who work within it Co operative working creates a highly professional environment in which we all strive to make the business successful We share a high level of commitment to the company and to our customers High Quality Products Delta T is a market leader in soil moisture monitoring with more than 25 years experience in providing researchers with innovative dependable soil moisture sensors We aim to continually improve and extend the capabilities of our products using the most up to date theory and technologies In addition to individual instrument sales we can also supply whole systems such as a multi point soil moisture measurement system with a data logger and solar power unit Sales and Support Delta T has an international network of representatives who can provide local sales and service in most countries Export sales account for 80 of Delta T s business Delta T has retained thousands of loyal customers al
12. Fertilisers The rate at which these are taken up depends on the weather conditions The WET Sensor can be used to measure EC within the growing media removing much of the guesswork from this procedure WET Sensors have been developed in co operation with PLANT RESEARCH INTERNATION AL WAGENINGEN DES Plant Research International formerly IMAG BV P O Box 16 6700 AA Wageningen The Netherlands Web site www pri wur nl Designers of the WET Sensor amp the ASIC which enables accurate measurement of permittivity and conductivity of the bulk soil or media nil gt SAINT GOBAIN Cultil ne STILENE Saint Gobain Cultil ne B V Zeusstraat 2 5048 CA TILBURG The Netherlands Web site www cultilene com Sponsors of research into horticultural media applications amp suppliers of horticultural media calibrations ee O a Q g LLI The HH2 Moisture Meter provides instant readout from most Delta T soil moisture sensors e Immediate display of water content e Store up to 1500 readings e Reads ML3 SM300 SM150 PR2 or WET Sensor Overview The HH2 offers impressive functionality in a compact hand held unit designed for field use Readings are displayed on the LCD and can be stored to memory for later download to a PC Up to 1500 time stamped readings can be stored Applications e Reads ML3 SM150 SM300 and WET Sensors e Reads PR2 6 and PR2 4 Profile Probes Simple
13. Mounting Plate type DL MKT Suitable for GP1 GP2 and DL6 Modem Box with GPRS Solar Power and Battery type GPRS BX1 SP See page 17 for description Modem Box with GPRS and Battery type GPRS BX1 B See page 17 for description r Q O 5 O ay sa i a GN an j k 16 The GP1 Data Logger is a compact research grade data logger e High accuracy channel data logging e 600 000 readings Overview Depending on the combination of sensors and accessories used the GP1 can take readings from e 2 ML3 SM300 or SM150 soil moisture sensors or other voltages e 2 Pressure transducer tensiometers e 2 Temperature sensors or 2 x SMS3O0s or 2 x SM150s e 2 Pulse counters for rainfall or water meter e 1 Delta T WET sensor The GP1 provides 2 differential voltage channels that are ideal for connecting MLS SM300 or SM150 soil moisture sensors The two temperature channels are optimised for 10k thermistor probes and provide accurate temperature readings over the range 20 to 60 C They can be used to log the temperature outputs from ML3 or SM300 sensors Either channel can alternatively be used to log the soil moisture output from additional SM300 or SM150 sensors Ease of use The GP1 is very simple to set up and maintain particularly for outdoor data logging applications Its small size and waterproofing IP67 allow it to be fitted wherever is most convenient and no secondary
14. PC PLEASE NOTE For many applications the GP2 Data Logger will provide a better solution than the DL2e Data Logger Please see pages 14 amp 15 However for customers who wish to log larger numbers of analog inputs using a single data logger the DL2e is still an excellent choice Brief Specification further specs on page 19 Voltage range 4mV 32mV 262mV 2 097V Resistance 1kQ 10kQ 100kQ 1MQ ranges Accuracy 0 1 0 6 to 50 C on lowest range 0 01Q lowest range Relay outputs 2 relays switching 1A 24V Sensor 2 relays switching battery excitation or external power Reading 128 000 readings storage Connections 13 pluggable screw connector blocks RS232 and external power Display 2 line LCD Environmental Weatherproof IP65 20 to 60 C Size weight 280 x 220 x 140mm 2 7K9 Battery type 6 alkaline AA batteries life 1 year quiescent 1 Accuracy applies over full 20 to 60 C Logger comparison table Input connections 12 differential or 24 single ended analog inputs configurable as Voltage Resistance 12 3 wire or 15 analog channels 6 voltage channels 2 voltage channels 1 water content 24 2 wire Bridge 12 expandable to 30 45 sensor or 1 WET or 60 1 temperature 2 temperatures or 2 Sensor additional SM150 or Potentiometer 12 SM300 Sensors 4 digital inputs as Counters 2 counters 1 counter 2 counters 2 fast 2 slow Frequency 83kHz amp
15. SK1 S Augering starter kit short For short access tube installation only includes 24mm pilot auger stabilisation plate and access tube insertion rod PR ASK1 L Augering starter kit long For access tube installation long or short tubes includes all items in PR ASK1 S Kit plus finishing auger and mallet PR AKC1 Augering kit complete For access tube installation long or short tubes includes all items in PR ASK1 L Kit plus flexicanes carrying bag and cleaning rod PR AUG2 25mm spiral auger for dry sandy soils PR EXK1 Access tube extraction kit P and 5 S normal soils Vaan oslos TETE ch i os oo anmn aMnD IAO Up to 40cm Y VY VV depth Up to im depth x VY VY f e For dry sandy soils the PR AUG2 e Only the complete kit includes a carrying bag e All items can be ordered individually 25mm spiral auger should be ordered in addition to the selected augering kit Key extra convenience Unsuitable Xx II Y Meets basic need VY Well suited vvv Well suited amp includes items for V 2 O ad A Q O A N on A Soil Moisture Sensor Sp
16. any channel combination Calculated measurements also allow implementation of custom formulas including trig functions common math functions and more Simulator e Implement simple or complex conditions algebraic expressions and record result values e Create and manipulate variables e g for disease risk factor This unique software feature allows logging programs to be tested before real world activation For applications involving weather data irrigation or soil moisture recording the environmental variables can be changed to test how the program responds Running the GP2 Simulator generates years of data displayed almost instantly Dependable quality The GP2 is a rugged sealed and completely dependable Its program editor has built in error checking and enables the full logger configuration including advanced features to be road tested before activation Sensor integrity set up and connections can also be checked before or during logging by viewing real time measurements Fault tolerance is provided by intelligent statistics rejecting erroneous sensor measurements and safety conditions upper and lower limits on active and rest periods The relay outputs can be configured as intelligent alarm outputs and LEDs on the front panel provide a quick visual reassurance that logging is proceeding correctly options Up to 2 5 million readings typical can be stored in internal FLASH memory 4 Mb
17. by hammering This new technique reduces the flexing that can produce air gaps around the access tube and minimises soil displacement Finishing auger to expand augered pilot holes to the exact diameter required for an access tube This specially designed adjustable finishing auger produces straight smooth sided holes in most soil types y dia nS ae eo Fo 1 f g ef S The optional PR EXK1 is a heavy duty system for removing installed access tubes from the ground The kit includes a cast iron jack chains jack foot and a tube clamp i PNK ARATIA NRN Qe alo er ODTION cl ON Ly il ww hy LIE I ww ww gt amp ww The DL6 GP2 and DL2e are versatile loggers that can be connected to many types of soil moisture sensor and other environmental sensors See page 19 for further information PR2 4 Notes 1 Profile probe can be instantly connected with dedicated cable and input socket With the GP2 P2 LID option up to 2 profile probes can be instantly connected to the dedicated input sockets A third probe can be connected using screw terminals 3 to 15 2 to 10 Basic DL2e logs 3 PR2 4s or 2 PR2 6s Analog expansion cards allow larger numbers to be connected PR A
18. can easily be inserted into substrates composts and most soils enabling growers and researchers to make rapid checks and optimise the uniformity of growing conditions Each reading takes less than 5 seconds and provides 3 of the most important indicators of root zone health water content pore water conductivity ECp and temperature C The sensor is particularly useful in horticulture for monitoring and correcting for variations when applying fertigation CRF or organic treatments Pore water conductivity The WET Sensor is able to calculate pore water conductivity ECp which is the EC of the water available to plant roots The ECp calculation is derived from an approximate relationship between dielectric properties This applies particularly well to WET Sensor readings which are taken at the same frequency within the same defined region of soil substrate The approximation is valid in most soils and is particularly accurate in mineral wool and other artificial substrates media The WET Sensor type WET 2 measures three vital soil properties Water content Electrical Conductivity EC and Temperature e Moisture and nutrient status in the root zone e Rapid monitoring of growing conditions e Calibrations for many soils and substrates Applications e Horticulture e Agriculture e Soil science e Pollution monitoring The WET Sensor is used throughout horticulture especially by soft fruit growers and for crops gro
19. d by any Delta T data logger and is compatible with a wide range of loggers irrigation monitors and controllers from other manufacturers The GP1 Data Logger offers a particularly competitive logging solution accepting 4 SM300s or SM150s moisture measurement only or 2 SM300s moisture and temperature See page 19 Easy to use The compact SM300 minimises soil disturbance preserving the original soil structure It is easy to insert and install whether at the soil surface or at depth and is well suited to use in plant pots The SM300 s circular shape allows it to be installed in augered holes insertion tubes are available Convenient interchangeable cables are available for the SM300 The options include bare ends for data logger connection and a dedicated connector for the HH2 Moisture Meter 5m 10m and 25m extension cables are available Ordering Information SM300 SM300 Soil Moisture Sensor with built in temperature sensor NB cable must be ordered separately See page 2 for cable and accessory options Brief Specification full spec on page 12 Water content Range Oto 1 0 men Accuracy 0 025 mein Temperature Accuracy 0 5 C Oto 40 C 0 75 C 20 to 60 C M Power Sto Ton erie see een Environment IP68 including connector H Figures apply to sensor only and exclude logger or cabling errors Patents US7944220 EP1836483 The SM150 Soil Moisture Sensor for rapid accurate
20. e carrying bag Suitable for PR2 and HH2 Moisture Meter Patents US7944220 EP1836483 veiw QqOld 2lJOld OTIM I P J LI C o TIAN AN Or O Nal ENJ l VJ 1 TRA f Profile Probes are used within access tubes inserted into augered holes in the soil correct installation is vital for accurate measurement of soil moisture orofiles The goal of installation is to produce optimal contact between the soil and the wall of the access tube The augered holes should be straight smooth sided and the correct diameter Delta T augering kits help you achieve the best possible access tube installation in virtually any soil However it may not be possible to install an access tube successtully in very stony soils or where a site features compaction voids foreign bodies or soil instability Three types of augering kit are available a PR AUG2 25mm spiral auger should be ordered in addition to the selected kit for dry sandy soils ahe ra Q AQ Al OG Stabilisation plate to keep the auger vertical Reading errors can arise from conical enlargement of the hole funnelling during augering especially in the top 30cm This results in poor contact between the surface of the access tube and the surrounding soil The stabilisation plate minimises this effect Insertion rod to drive the access tube into an augered hole by applying force to the bottom of the tube normally
21. ecifications Multi parameter ML3 ThetaProbe SM300 e WET Sensor Yo fe ri Measurement Volumetric water content and soil Volumetric water content and soil Volumetric water Pore water Temperature temperature temperature content conductivity ECp Accuracy 0 01 m m 1 0 025 m3 m 2 5 0 03 m m 3 See graph on 1 5 C With soil specific calibration With soil specific calibration 0 5 C O to 40 C for temp sensor 0 5 C O to 40 C for temp sensor page 6 Soil moisture Full accuracy over Full accuracy over Full accuracy over measurement 2 to 0 5 m m 0 to 0 5 m m 0 to 1 0 m3 m See graph on 0 to 50 C page 6 range Full range 0 to 1 0 m m Fullrange 0 1e 1 Omen Salinity range 50 to 500 mS m 50 to 1000 mS m 0 to 300 mS m Salinity errors lt 0 035 m m from Salinity errors lt 0 035 Supplied with extended range calibrations which should 0 05 to 0 4 m m Can be calibrated Tim m from 0 to 0 4 m m be used for readings between 300 to 500 mS m Upto 2 O00 MS mM Temperature Full accuracy over 0 to 40 C Full accuracy over 0 to 60 C 5 to 50 C range 0 75 C 20 to 60 C for temp 0 75 C 20 to 60 C for temp sensor Figures exclude logger or sensor Figures exclude logger or cabling errors cabling errors 0 to 1 0V differential 0 to 1 0V differential Serial TTL data providing permittivity bulk c
22. even be left installed in frozen soils Typical areas of use include environmental plant soil ecology and geo sciences research as well as civil engineering and agricultural engineering applications Applications Soil Science Agronomy Horticultural and agricultural research Civil engineering 10 Suction kPa log scale FQ3 Equitensiometer The EQ3 s full range is O to 1000 kPa but best accuracy is achieved between 100 and 500 kPa This makes it well suited to plant water stress studies even in very dry soils Please note that despite its many strengths and advantages over water filled tensiometers the EQ3 should not be seen as a rapid response sensor that covers the full range of matric potentials at high accuracy Such a sensor does not yet exist EQ3 equilibration time is typically several hours As the EQ3 is maintenance free no refilling degassing or topping up required frost resistant and low powered it can be conveniently used at remote sites over long periods of time In such instances It is possible to access sensor data wirelessly via a GPRS enabled data logger such as the GP2 Ordering Information full specs on page 13 EQ3 EQ3 Equitensiometer See page 2 for cable and accessory options SWT4 t40 Water filled tensiometer with 40cm shaft M SWT4R t40 Refillable version of SWT4 1 SWT5 s07 Miniature water filled tensiometer with 7cm shaft 2 All SWTs are fitted
23. glands GP1 EPC1 External power cable GP PBA X50 Precision bridge adapter board USB RS232 USB to RS232 Adapter Cable 100cm cable connects 9 pin RS232 to USB for connection to PC Smart irrigation control The GP1 enables smart irrigation control using any combination of soil water content matric potential rainfall temperature etc It can be configured simply to inhibit irrigation while the soil moisture is above a threshold value but full logic control is also available including a pulse option for matching the rate of irrigation to the absorption dynamics of the soil Brief Specification further specs on page 19 Voltage range 0 2 to 2 7V differential Accuracy 1 6mV 0 05 of reading Temperatures 0 07 C typical at 20 C 10k thermistor 1 x 50HZ 1 x 33kHz max Relay output lt 30V DC or lt 24V AC 1A fuse resettable Sensor Switched battery 5 to 9V 120mA max or precision 5V DOMA max Reading 600 000 readings typical storage Connections 4 cable glands 5 way RS232 external power connector Environmental Waterproof IP67 20 to 60 C Size weight 140 x 105 x 45mm 280g Battery type 9V 6LR61 PPS alkaline life 1 year 1 Accuracy applies over full 20 to 60 C excitation 2 The 2 temperature channels can be configured as SM150 or SM300 soil moisture inputs but they provide only single ended inputs so should not be used with long cables or in
24. ilities may be available for customers placing regular orders Details of these facilities and documentary credit conditions can be obtained from Delta T GUARANTEE AND SERVICE Delta T guarantees its products against defects in manufacture or materials for a period of 24 months from the date of delivery Full details including terms and conditions of sale and arrangements for servicing and recalibration are available on our website AT Delta T Devices Delta T Devices Ltd 130 Low Road Burwell Cambridge CB25 OEJ UK T 44 0 1638 742922 F 44 0 1638 743155 E sales delta t co uk Co operatively owned and managed SMM 03 15 www delta t co uk A A AN ited in UK
25. ined with a GP2 Logger battery solar panel and modem to create a complete system NB customers need to provide their own SIM card and make arrangements with a network provider The SIM must have a fixed IP address and be GPRS enabled Reading 16 000 readings non volatile storage Connections 8 cable glands 8 way PR2 connector RS232 connector Environmental Waterproof IP67 10 to 50 C Size weight 180 x 160 x 70mm 830g Battery type 6 alkaline AA cells life 1 year Ordering Information Data Logger with DeltaLINK PC software and RS232 cable DL6 MKT1 Mounting Kit with 1m ground stake brackets clamps and fixings USB RS232 As page 16 Ordering Information GPRS Modem for GP2 Logger type MD GPRS 1 Includes quad band GPRS modem and 3db antenna with cable and power cable fits into M ENCL B2 Enclosure for weather protection Enclosure and 12V wiring kit for GP2 type M ENCL B2 For mounting onto Delta T masts Backplate mounted 12V battery wiring system with protected input power terminals Comprises lockable IP53 steel enclosure cable glands supplied with 12 glands as standard and trunking Suits GP2 Logger and MD GPRS 1 Modem The cost of the enclosure includes the fitting and partial pre wiring of any logger power supplies and modem ordered at the same time Dimensions 500 h x 400 w x 250 d cms NB Does not include battery charger or solar panel Rechargeable batter
26. ise errors rod length is 60mm due to soil compaction by the rods Data logging and readout The ML3 can be logged by any Delta T Compact The ThetaProbe nas a 40mm Easy to insert and remove from cylindrical diameter body with threaded augered holes data logger and many loggers from shape end Extension tubes 0 5 Rapid attachment of extension tubes other manufacturers x and 1 0m screw onto this Handy size for portable use thread Case sealed to IP68 Rugged and buriable to 5m For portable applications the ML3 connects to the HH2 Moisture Meter and these can be ordered together in convenient form as the ThetaKit see Applications image on page 8 NB the HH2 does e Environmental Research Soil water is one of the critical components for not provide temperature indication long term studies of global climate and local environments The accuracy from the ML3 and reliability of the MLS makes it ideally suited to these applications e Sports Turf and Golf The ML3 Thetakit is used by sports turf professionals worldwide to spot check soil moisture content and to monitor the performance of automatic sprinklers See image on page 8 The SM300 Soil Moisture Sensor measures soil moisture and temperature with research grade accuracy e Dependable accuracy 2 5 e Soil moisture and temperature e Good temperature and salinity stability e Easy data logger or meter connection Research grade sensor The SM300 offers excellent perfo
27. ith reduced accuracy 2 Corresponding to O to 0 6 m m 3 5 5V DC with 2m cable 7 5V with 100m HH2 Moisture Meter The HH2 is a versatile readout unit that provides an easy and convenient way to display and store readings from Profile Probes With the HH2 and PR2 combination a Probe can be moved from access tube to access tube enabling large amounts of soil moisture data to be collected at multiple sites see page 8 i di Vg l Y 4 a N ha Above PR2 6 Profile Probe with HH2 Moisture Meter Right PR2 4 Profile Probe Ordering Information PR2 4 Profile Probe 40cm no cable PR2 6 Profile Probe 100cm no cable All Profile Probes are fitted with an IP68 connector and come with a protective tube Cable must be ordered separately Standard cables PRC d HH2 1 5m cable IP68 M12 connector to 25 way D socket Connects PR2 to HH2 Moisture Meter PRC M12 05 5m cable IP68 M12 connectors Connects PR2 to GP2 or DL6 Logger PRC w 05 5m cable IP68 M12 connector to bare wire Connects PR2 to data loggers The EXT 8W xx cables can be connected together to create custom lengths then fitted to a PRC M12 05 or PRC w 05 cable for data logger connection Access tubes and PR2 accessories ATS1 Short access tube includes cap bung and collar For use with PR2 4 ATL1 Long access tube includes cap bung and collar For use with PR2 6 PR2 SP Profile Probe spares kit PR CB2 Protectiv
28. l over the world who value the reliability performance and long term service that we provide Their feedback is incorporated into many of our product designs to create a process of continuous improvement Policy Statement We aim to manufacture and sell instruments for use in work beneficial to the environment and directly related to human and animal welfare As a matter of conscience we reserve the right not to sell our instruments to people or institutions involved in military work tobacco research environmentally destructive practices and factory farming The Delta T Devices Soil Moisture Range Delta T Devices has decades of experience in creating premium grade equipment for soil moisture measurement and recording Our instruments are built to exacting standards ensuring ruggedness longevity and optimum performance throughout their life They are used and trusted by researchers around the world and are suited to a wide variety of applications and budgets The Delta T Devices soil moisture range includes a wide choice of sensors and meters pages 1 13 and data loggers pages 14 19 More information can be found online at www delta t co uk Overview of Delta T Soil Moisture Sensors x x x x x x x Ec x x lt x x x x Phas r filing Cable options and accessories for the ML3 ThetaProbe SM150 SM300 Sensors and EQ3 Equitensiometer SMSC sw 05 5m cable terminating in bare wires for connection
29. m comms and power extension cable antenna and 5m coaxial cable Supplied with mounting kit for fixing to tubular masts or poles 42 51 mm dia Modem Box with GPRS Solar Power and Battery type GPRS BX1 SP For use with GP2 GP1 and DL6 Loggers Includes all items supplied with GPRS BX1 B plus solar regulator 30W solar panel 2m cable and mounting bracket for solar panel a network provider The SIM must have a fixed IP address and be GPRS enabled GP2 to Modem Box Cable M12 to M8 type GP2 GP1 M8 M12 f to M8 m 0 9m cable Connects GP2 Data Logger to GPRS Modem Boxes Also directly links GP2 and GP1 cable networks DL6 to Modem Box Cable M12 to M8 type GP1 DL6 MB8 M12 f to M8 m 1 5m cable Connects DL6 Data Logger to GPRS Modem Boxes Also directly links DL6 and GP1 cable networks Modem Boxes for use with a GP2 or DL6 logger require an additional cable to be ordered For GP2 order GP2 GP1 MB8 cable For DL6 order GP1 DL6 MB8 cable The logger has to be situated outside the modem box e g mounted on a mast pole Enclosure Power and GPRS Modem options for V S Q QO xl _ QO Ot q an Q Sensor Switched battery 5 to excitation 9V 120mMA max GP2 Data Logger individual items When a lockable enclosure is required for example to provide security environmental protection or easier cable routing and connection the M2 ENCL Enclosure is available The M2 ENCL B2 can be comb
30. noisy environments The accuracy figures quoted for GP1 soil moisture readings do not apply to these resistance channels when configured as soil moisture inputs The DL6 Data Logger is optimised for use with Delta soil moisture sensors e High accuracy 8 channel data logging e ideal for Profile Probes ThetaProbes SM300s and SM150s Overview The DL6 can record data from e 6 Soil water content sensors or other analog voltages e 1 Temperature sensor e 1 Pulse counter e g rainfall The DL6 can be used with combinations of ThetaProbes SM300s SM150s and Profile Probes as well as a temperature sensor and raingauge It is well suited to both research applications and environmental monitoring Application Areas e Monitoring soil moisture e Dedicated Profile Probe connector Brief Specification further specs on page 19 Voltage range 0 01 to 1 15V differential voltage 0 8 On GPRS Modem Systems for GP2 GP1 and DL6 Data Loggers Users have a choice of two modem box solutions for GPRS communications one with battery and solar power the other with just a battery These are complete systems only the data logger has to be ordered separately NB customers need to provide their own SIM card and make arrangements with Ordering Information Modem Box with GPRS and Battery type GPRS BX1 B For use with GP2 GP1 and DL6 Loggers Includes quad band GPRS modem 10Ah sealed lead acid battery and 1
31. ntent Precision trusted range of Maintenance free dielectric tensiometer reliable low cost option for making readings in a vertical soil profile tensiometers for use in with soil temp measurement Can be left soil and substrate moisture Used in access tubes for easy weiter soils well suited installed even in frozen soils Best results measurements It measures insertion and removal Can be left to the study of water in dry soils Readings are lower accuracy volumetric soil moisture content with installed for data logging or used uptake movement They than water filled tensiometers 3 accuracy offering precision and with the HH2 for multi site portable require regular ruggedness at an affordable price readings maintenance I NS t i a a Q 3 14 The GP2 Data Logger and Controller is a powerful weatherproof research grade data logger with unique features for recording and controlling field experiments e 12 differential channels e High performance microvolt sensitivity e Easy to set up and select sensors e Versatile communication options The GP2 is a 12 channel field data logger with advanced control capabilities ideal for demanding research applications and field work It is weatherproof rugged battery powered and comes with 12 differential analog inputs and 2 relays as standard It can log most sensor types and accepts voltage resistance current potentiometer counter bridge freq
32. onductivity and temperature from which water content and pore water conductivity are calculated Corresponding to O to 0 6 m m Corresponding to O to 0 6 m nmv Power 5 to 14V 18mA for 1s 5 to 14V 18mA for 1s 6 to 10V 38mA for 2 5s requirement Minimum 5 5V with 100m cable Minimum 5V with 100m cable Environmental IP68 40 to 70 C IP68 Sample 60 x 30mm diameter 55 x 70mm diameter 500ml volume l Sample volume is weighted towards Sample volume is weighted Sample volume is weighted towards soil immediately soil immediately surrounding the rods towards soil immediately surrounding the rods surrounding the rods Dimensions Overall 158 x 40mm dia Overall 143 x 40mm dia Overall 120 x 45 x 13mm and weight Rods 60mm x 3 2mm dia Rods 51mm x 2 5mm dia Rods 68mm x 3 0mm dia Weight 0 1 kg excl cable Weight 0 1 kg excl cable Weight 0 1 kg Sensor Individual sensors are interchangeable Sensor calibrations supplied in WET Sensor EEPROM calibrations Recalibration advised every 3 years depending on use Recalibration advised every 3 years depending on use Soil Generalised Mineral and Organic soil calibrations are supplied Generalised Mineral Organic Sand and Clay calibrations calibrations are supplied specialist calibrations are available for horticultural substrates See page 9 Applications __ Versatile high
33. or Resistance 5 8Q to 28k for temp sensor Precision 10 6V 1 3mA 5 to 14V 18mA for 1s 5 vol over 100 to 1000 mS m Salinity errors included in and 0 60 vol specification Full accuracy over Full accuracy over 0 to 60 C 0 to 40 C 0 to 1 0V differential 0 to 1 0V differential Corresponding to 0 to 0 6 m m PR2 6 x6 outputs PR2 4 x4 5 14V 18mA for 1s 5 5 to 15V PR2 6 120mA for 1s PR2 4 80mA for 1s Minimum 5V with 100m cable Minimum 7 5V with 100m cable IP68 with Delta T supplied cables IP67 handle IP68 PR2 rod when installed in access tube 55x70mm diameter 95 sensitivity within a cylinder of diameter 200mm Sample volume is weighted towards soil immediately surrounding the rods or rings Overall 143 x 40mm dia PR2 6 length 1350mm Depends on model and 181 mm x 40 5 mm diameter Rods 51mm x 2 5 mm dia PR2 4 length 750mm shaft length Both 25 4mm diameter Weight 0 1 kg excl cable PR2 6 12 k9 PR2Z 4 038 ko Weight 0 3 kg excl cable Individual sensors are interchangeable Interchangeable sensors Individual sensor calibrations supplied Recalibration advised every 2 years depending on use Recalibration advised every 3 years depending on use Generalised Mineral and Organic soil calibrations are supplied No soil calibrations No soil calibrations required required Entry level sensor providing a Provides rapid moisture co
34. r with 12 analog 4 event and 2 relay channels plus 1 WET Sensor channel Includes DeltaLINK PC Software USB cable and Quick Start Guide Expansion Lid with 5 cable glands type GP2 G5 LID GP2 lid with 5 general purpose cable glands Each gland accepts either a single cable of 3mm to 10mm diam or 2 cables of 4 5mm to 3mm diam using gland insert Expansion Lid with 2 Profile Probe connectors type GP2 P2 LID GP2 lid with 2 sockets for connection to Profile Probe cables PRC M12 05 Relay Expansion Module type GP2 RLY Provides 4 extra relay outputs Increases number of relay channels from 2 to 6 GP2 Network Power Cable type GP2 NPC For use with GP2 NTP Network T Piece Connects to EXT 5W xx cables to provide power and communications to one or more GP2 Loggers Network T Piece type GP2 NTP Enables GP2 Data Logger to use M12 network cabling Connects to EXT SW xx M12 cables and to GP2 USB cable Mains Power Supply type GP2 PSU For GP2 Data Logger Input 100 240V AC 50 6OHZz Output 2 5A 12V via screw terminals requires minimum 2A 2 core wire Must be protected from weather Suitable for powering GP2 directly or via GP2 NPC Network Power Cable Requires correct IEC mains lead see below Mains lead national plug to IEC connector types PC UK PC EU PC US PC IN PC CN Connects to GP2 PSU and LBC4 Service Pack type GP2 SER Contains battery holder cable gland bungs and a selection of other spares
35. rate calibration upgrade Calibration sales codes dependent on WET partnering equipment Substrate calibration upgrades If additional horticultural substrate calibrations are required they should be ordered at the time of purchase of the HH2 GP2 or GP1 Substrate calibrations are factory installed at Delta T s premises HH2 GP2 GP4 WET GH 1 WET GH 1G2 WET GH 1G WET ST 1 WET ST 1G2_ WET ST 1G l Substrate calibration upgrade Horticultural media including coir peat based potting mixes and greenhouse mineral soils Mineral wools vertical and horizontal measurement Fertigation and hydroponics Where plants are grown in artificial substrates nutrients are routinely supplied in irrigation water fertigation Nutrient levels are controlled by monitoring the water content and conductivity EC and adjusting the injection of liquid fertiliser into the irrigation water The Delta T WET Sensor excels in monitoring this crucial information Soil salinity If the irrigation water is recycled or abstracted from rivers with high levels of dissolved salts over time there can be a build up of soil salinity Soil salinisation will eventually reduce crop yields The WET Sensor is fast and efficient for sampling soil salinity ensuring that growers have the essential information they need to take remedial action Container grown shrubs and trees Nutrients may also be orovided by Controlled Release
36. red holes in the soil Access tubes require an installation hole only 27mm in diameter allowing easy installation and minimal soil disturbance They are manufactured to strict tolerances and are exceptionally strong and durable in the soil Correct installation is essential and we recommend the use of our specially designed augering equipment see next page Robust The PR2 is constructed from the highest grade components and materials to ensure robustness in harsh environments Reliable environmentally sealed IP68 connectors provide a wide range of cable length and connectivity options This flexibility makes sensor connection and disconnection quick and easy Data logging The DL6 is a dedicated logger optimised for use with Profile Probes and other Delta T Moisture Sensors See opposite For multi probe applications the DL2e 10 Logger is ideal see page 16 Brief Specification full spec on page 13 Output PR2 6 6 x Oto 1 0V 2 PR2 4 4 x 0 to 1 0V 5 5 to 15V F PR2 6 120mA for 1s PR2 4 80mA for 1s Sensing depths PR2 6 10 20 30 40 nominal 60 100cm PR2 4 10 20 30 40cm Sampling volume Vertically 95 sensitivity within 50mm of upper rings Horizontally 95 sensitivity within 200mm diameter Size PR2 6 1350 x 25 4mm length x diam PR2 4 750 x 25 4mm Sealing IP68 Size ATL1 1154mm x 28mm length x diam ATS1 554mm x 28mm 1 Measures full range up to 1 0 m m w
37. rmance in normal and saline soil conditions and is stable across wide ranges of temperature and salinity Its construction uses industrial grade connectors and high specification materials throughout to produce a highly dependable soil moisture sensor The built in temperature sensor simplifies soil temperature measurement and achieves 0 5 C accuracy Applications e Soil science e Agronomy e Horticultural and agricultural research e Environmental science The SM300 is only 148mm long allowing it to be placed in plant pots and other confined spaces Its accuracy and affordability make it a good choice for vertical soil moisture profiling in situations where Profile Probes see page 10 would not achieve high enough accuracy or enough depth The SM300 is ideal for use in situations where temperature profiling is also required lt 7 6 lt a ws a I ws 9 _ gt lt UZG lt 20 gt 40mm Ss Calibration The SM300 is provided with general calibrations for mineral and organic soils A two point soil specific calibration can be performed for greater accuracy if required Data logging and readout The SM300 is a dual purpose probe it can be used with the HH2 Moisture Meter for instant moisture readings or left in situ for data logging to provide moisture and temperature data NB the HH2 does not provide temperature indication from the SM300 or ML3 sensors The SM300 can be logge
38. sertion cabling system makes it simple to E TE Aane extend or replace cables offering a 7 0 75 C 20 to choice of 1m 5m 10m and 25m 60 C 1 extensions ML3 cables and connectors are buriable and environmentally protected to IP68 The salinity response of the MLS has Sample vol 60 x 30mm diameter 1 Figures apply to sensor only and exclude logger been improved its output has been or cabling errors Size 158 x 40mm diameter characterised at EC values up to 2000 Sie OOo Patents UK patent 2300485B US patent 5804976 mS m The temperature range has IP68 40 to 70 C also been improved with tests demonstrating that the ML3 can non flexing cables Output 4 rod 3 rods are arranged around e Retains soil closer to central rod in i llati arrangement a central rod This creates a case of drying and cracking other nstallation defined cylindrical zone of designs and particularly flat PCB ThetaProbes are robust buriable and T g measurement 60mm long x sensors don t do this maintenance free They can be inserted ao AM aA a Pan pe TACE LHS into augered holes or positioned in the wall of a trench which is then carefully Replacement Made of 3mm diameter Withstands repeated insertion in soil back filled Optional extension tubes rods AA resilient 304 austenitic Replaced at low cost if bent or damaged E E T EE stainless steel with Highly resistant to corrosion p sharpened tips The exposed Sharp narrow rods minim
39. t can read 30 ThetaProbes or 10 PR2 6 Profile Probes or 30 SM300s or 60 SM150 sensors or up to 15 tensiometers Expandable platform The minimum DL2e system can be quickly adapted by adding extra cards that expand the capacity of the basic logger The SWT range of tensiometers see page 9 can be used with the DL2e if it Is fitted with a TVB1 or TVB M Voltage Regulator There is a wide range of mounting options power supplies communication systems and enclosures available for creating complex logging systems The DL2e Data Logger is also portable weatherproof battery powered and very easy to set up so it makes an excellent choice for quick and simple logging tasks Easy software The DL2e is supplied with the Ls2Win software for configuring logging sessions managing sensor libraries graphing real time readings and collecting stored data The built in DL2e keypad and display can be used to test sensor connections in the field and to check logging status NB The DL2e is not compatible with DeltaLINK software Ordering Information Data Logger including 15 30 analog channels 128k readings memory Ls2Win software and RS232 cable 15 30 Channel Analog Input Card Voltage Regulator provides stabilised 10 6V DC As TVB1 but requires environmental protection such as M2 ENCL enclosure USB RS232 USB to RS232 Adapter Cable type USB RS232 100cm cable connects 9 pin RS232 to USB for connection to
40. temp v 2 temp J temp O without temp 5 excl temp J 4 excl temp 6 with temp 12 without temp O with temp Y 1 with temp v 2 with temp Z without temp O without w 5 excl w v 4 excl temp vay v 2 a with expansion lid v 10 3 PR2 4 with expansion lid 15 PR2 4 WET WET Sensor e 6 with temp T 12 without temp O with temp E v 6 as a only v 2 as aa only only O without Temperature Tensiometers a requires requires ee o PBA X50 Counters or Events Counters or Events Events 4 2 v a2fast2slow 2 slow i 2 1 fast 1 slow pe 1 With USB to RS232 Adapter Cable type USB RS232 3 Temp channels provide only single ended inputs so should not be used with long cables or in noisy environments 2 With appropriate expansion cards and power supply when used with soil moisture sensors The accuracy figures quoted for GP1 soil moisture readings do not apply to arrangements these resistance channels when configured as soil moisture inputs dal am D i Cm i oa cole LULA Ordering Information UK customers SALES AND TECHNICAL ENQUIRIES should be made directly to Delta T in the UK sales delta t co uk As well as sensors for soil moisture measurement Delta T specialises in instruments for Meteorology Solar radiation studies Canopy analysis PRICES are available on request and a detailed quotation can be provided if required Leaf area inde
41. tion The SM150 is provided with general calibrations for mineral and organic soils A two point soil specific calibration can be performed for greater accuracy If required SM150 Kit e Complete kit for low cost substrate moisture measurement e 3 accuracy The SM150 Kit provides growers with a very affordable and easy to use tool for obtaining reliable moisture measurements with minimal soil disturbance The cable and connector are watertight an essential requirement for potentially wet environments The kit comprises an SM150 Soil Moisture Sensor a dedicated HH150 Moisture Meter and a carry case The HH150 hand held meter is light weight and is very easy to use being a readout only device no data recording or PC complications The kit is simple to use just insert the SM150 into the substrate and press the Read button f 4 Moisture SM300 amp SM150 ps Ordering Information SM150 SM150 Soil Moisture Sensor fitted with M12 connector NB cable must be ordered separately SM150 KIT Portable soil moisture kit including SM150 Sensor HH150 Meter 1m fitted cable manuals and carrying case See page 2 for cable and accessory options not applicable to SM150 Kit Brief Specification full spec on page 13 Sample 55 x 70mm diameter volume 143 x 40mm diameter Environment IP68 including connector Rapid checks on growing conditions The WET Sensor
42. ubstrate calibrations can be ordered as a Set for a variety of horticultural media including coir peat based potting mixes and greenhouse mineral soils WET ST 1 substrate calibrations can be ordered for mineral wool vertical and horizontal See page 7 for calibrations ordering information Water deficit This reading indicates the amount of water needed in mm to restore the soil to field Capacity down to a user defined rooting depth The HH2 calculates water deficit from the user defined field capacity and from readings taken either from a single sensor or the individual sensors of a Profile Probe The HH2 User Manual contains tables of standard soil classifications and their associated field capacities Soil types Standard calibrations for generalised mineral and organic soils are supplied with the HH2 for use with the ML3 Profile Probe and SM300 Sensors The HH2 also enables up to 5 extra user defined soil calibrations to be characterised and stored The soil calibration can be switched at any time during the collection of data and can be specified separately for each sensor position on a single Profile Probe The unconverted mV readings can be stored alongside the soil water readings Ordering Information Moisture Meter type HH2 with integral 25 pin D connector battery RS232 cable and 25 to 9 pin adapter If the HH2 is intended for use with a single ML3 ThetaProbe or a single WET Sensor it can be
43. uency and digital state inputs Sensors Inputs e 12 differential or 24 single ended analog inputs configurable as Voltage Resistance 2 wire or 3 wire Bridge Potentiometer Thermistor 3 wire e 4 digital inputs as Counters 2 fast 2 slow Frequency Digital state e 1 Delta T WET sensor channel The GP2 provides a versatile solution for both simple and complex recording and control applications Simple point and click software makes it easy to set up logging parameters Delta T sensors can be selected from a menu Flexibility and customisation The GP2 s analog inputs can be fully customised Each channel can have its own input type and recording parameters DeltaLINK software gives the user control over reading frequency thresholds and units and provides recording options for average min and max plus specialised wind options Users can add their own custom sensor types to the sensor library exploiting the GP2 s detailed configuration options The GP2 provides 4 analog input ranges down to microvolt resolution with adaptive auto ranging excellent analog accuracy and configurable sensor excitation enabling it to Support nearly all analog sensors Calculations based on the measurements from several inout channels can be recorded and displayed as additional virtual channels calculated measurements A range of expansion lids is available with additional cable entry points and config
44. urations including dedicated connectors for Delta T Profile Probes and wider diameter cable entry glands GP2 Data Logger amp Controller Advanced Features e Flexible control outputs e Powerful Script Editor e Virtual Channels e Unique program Simulator The GP2 is a flexible and powerful research and control tool enabling model implementation simulation and evaluation Script Editor The Script Editor creates step by step operations to control simple or complex processes or recording requirements The sophistication it offers opens up a huge number of potential applications e Sophisticated control algorithms create complex and powerful models such as PID proportional integral derivative Control via simple step by step operation No programming language skills are needed only a reasonable knowledge of Excel spreadsheet level algebraic expressions is required Custom in line data processing implement real time data driven calculations such as dew point wind chill factor and evapotranspiration calculation and analysis GP2 with Expansion Lid tyoe GP2 G5 LID fitted Application Areas Demanding research projects Environmental monitoring Irrigation control PID control applications Soil moisture recording simple connection to Profile Probes Virtual Channels Data can be processed to obtain max min sum etc and the results logged to a virtual channel Calculations can be made using
45. versatile operation The HH2 can be operated with one hand for convenience in the field Each time stamped reading includes a unique sample number a plot identification letter A to Z and a sensor location number 1 to 255 Data is transferred to a PC using the RS232 cable provided with each unit See ordering information for USB connection The HH2Read software provides a Dataset Import Wizard for direct download into Excel Data can also be downloaded in comma separated ASCII csv format Reading Profile Probes The HH2 Moisture Meter can take readings from a PR2 Profile Probe wherever access tubes have been installed With an installed array of access tubes one HH2 PR2 combination can orofile large areas quickly The HH2 auto detects the number of sensors in each Profile Probe MLS Thetakit Reading WET Sensors The HH2 is able to display the 3 outputs produced by the WET Sensor and store them until downloaded to a PC Standard calibrations for Mineral Organic Clay or Sand media can be selected In addition user defined custom calibrations can be entered for soils and other substrates User selectable options allow pore water and or bulk conductivity to be displayed and also the permittivity The HH2 provides user selectable temperature compensation Horticultural media calibrations The WET Sensor is supplied with default calibrations for generic mineral organic sand and clay soils WET GH 1 s
46. wn in protected environments where correct growing conditions are critical to both yield and flavour The compact sensor can be inserted directly into the growing medium with minimal disturbance to either roots or shoots and provides information for process optimisation or checking growing condition uniformity The WET Sensor can also be used to monitor the build up of salinity when irrigating with poor quality water though it should not be used in conditions of high salinity See graph below Horticultural media calibrations The WET Sensor is supplied with default calibrations for generic mineral organic sand and clay soils Special WET GH substrate calibrations can be ordered as a set for a variety of horticultural media including coir peat based potting mixes and greenhouse mineral soils Alternatively WET ST calibrations can be ordered for mineral wool vertical and horizontal measurement Pore water conductivity accuracy Pore water conductivity ECp mS m 0 3 0 4 0 5 typical accuracy 5 reading max errors 10 of reading or 10 mS m typical accuracy 10 reading max errors 20 of reading or 20 mS m 1 whichever is greater 0 6 Soil water content 0 m m Logging option The WET Sensor can be connected to the GP2 or GP1 Data Logger in order to monitor fluctuations in growing conditions over time The smart control relay capability of the GP2 and GP1 are
47. x Plant physiology Environmental monitoring PAYMENT for new customers we usually ask for payment in advance Account facilities are available for customers placing regular orders Details can be obtained from Delta T and our products include Weather stations Sunshine Pyranometers Data loggers Porometers Customers outside the UK Canopy analysers OVERSEAS REPRESENTATION Delta T has an extensive network of representatives A list is available on our website In these countries all sales and technical enquiries should be directed to our representatives DIRECT SUPPLY if there is no Delta T representative in your country we will Supply you directly from the UK Export sales account for 80 of our business and we have many years experience of dealing with enquiries from overseas clients Image analysers for leaves GP1 Data Logger controlling precision gantry irrigation within a glasshouse at Hillier Nurseries Representative PAAS m E To B ro Cottbus Taubenstrasse 4 Fon 49 355 485 54 0 D 03046 Cottbus Fax 49 355 485 54 15 PRICES are available on request vertrieb upgmbh com www upgmbh com from your local representative or Delta T Detailed quotations can also be provided when needed including costs for freight insurance and documentation PAYMENT our normal terms are payment in advance of shipment or by irrevocable documentary credit Account fac
48. y type LBAT4 12V 10Ah sealed lead acid battery spade terminals Solar Powered Charging System for GP2 Logger type SOL4 KIT2 30W solar panel with mounting kit including U clamps regulator charger and cabling NB does not include enclosure mounting mast or battery Must be used with a suitable enclosure when ordered for use with a GP2 Logger an M ENCL B2 Enclosure must be ordered at the same time Battery charger for LBAT4 type LBC4 Mains battery charger for 10Ah lead acid battery Input voltage range 100 240V AC 3A For indoor use only Requires correct IEC mains lead ordered separately see below Mains lead type PC xx Connects national plug to IEC connector to LBC4 Battery charger See page 15 for details 18 The DL2e Data Logger is a weatherproof field data logger with a versatile range of expansion options e Battery powered weatherproof and rugged e User expandable from 15 up to 62 input channels e Easy configuration data collection and display Overview The DL2e is a versatile field logger able to read a wide range of sensors e 15 differential or 30 single ended analog channels voltage or resistance 2 counters 2 relay outputs or sensor excitation optional analog expansion cards up to 64 channel limit Applications e General data logging for moderate to complex systems The DL2e is well suited to projects requiring large scale soil moisture records When fully expanded i
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