Soil Moisture Measurement catalogue - Delta
Contents
1. Delta T Devices Leaders in jt Environmental Meee as Rie Soil Moisture Measurement E3 P Lal E a Delta T Devices Company Profile Origins Established in 1971 Delta T 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 an 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 17 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 normal 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 more than 75 of Delta T s business Delta T has retained thousands of loyal customers all over the world who value the reliability performance and long term ser2. Advice on complete systems Further information The ThetaProbe has been jointly Comparison with other techniques ThetaProbes have some clear advantages developed with the Macaulay Land Use over TDR systems In general terms ThetaProbes are more stable more reliable at high salinity easier to log use less power have simpler cabling requirements and can be used to make spot readings on the move as well as being buried for long term logging Research Institute MLURI as originally described in ThetaProbe ML2 Principles of Operation and Applications J D Miller and G J Gaskin available for download from www delta t co uk Neutron Probes have many drawbacks when compared with ThetaProbes They create licensing and safety problems they cannot measure the top 25cm of soil they cannot be data logged and the overall cost of ownership is high Profile Probes are in many respects an even better alternative to neutron probes see page 10 Patents UK patent 2300485B US patent 5804976 Patent applied for EUR 963031 90 1 The SM200 Soil Moisture Sensor is an affordable research grade sensor that gives reliable readings in all soil types Dependable accuracy 3 Research grade sensor The market leading SM200 offers outstanding performance in normal and saline soil conditions and it is stable across a wide temperature range It uses industrial grade connectors
3. 50 C irrigation control features See box on page 14 When used with a PR2 4 the DL6 can also connect to 2 ThetaProbes SM200s or other analog voltage sensors Size weight 180 x 160 x 70mm 830g Battery type 6 alkaline AA cells life 1 year 2 Accuracy applies over full 10 to 50 C Accessories The DL6 is available with a wide range of accessories and communication options including GSM modem systems and cable network options see page 17 Ordering information Data Logger with DeltaLINK PC software and serial cable DL6 MKT1 Mounting Kit with 1m ground stake brackets clamps and fixings The DL2e Data Logger is a weatherproof field data logger with a versatile range of expansion options Battery powered weatherproof and rugged User expandable from 15 up to 62 input channels Easy configuration data collection and display Overview The DL2e is a versatile field logger able to read a wide range of sensors that can be extended still further with a selection of expansion cards 15 differential or 30 single ended analog channels voltage or resistance 2 counters 2 relay outputs or sensor excitation optional expansions cards up to 64 channel limit 15 differential or 30 single ended analog channels 12 channels 4 wire measurement max 2 cards 15 counters Signal attenuation and input protection options Applications General data logging for moderate to comple
4. PR2 Profile Probes http www ceh ac uk sci_programmes water html y T 3 e 1 d ope a a t porq ok m mE A x wnt tee j z eu toma Ug Wa L n 7 L r a SE E WM ie wit c i a 2 3 mL E j LES j E a8 J T E To t 7 ET ow M N r3 k 73 UM i E m 5 4 I Outdoor beds of Spiraea above controlled by SM200 Soil Moisture Sensor right and GP1 Logger not shown Hillier Nursery Weekly Summary 40 B Rainfall E Irrign GP1 Auto scheduled bed 140 p 120 i E E 100 w 2 E 80 mm os w m a gt x o o z III I PIU I 20 0 El Irriga Manual scheduled bed Mean 6 1 mm day i Mean 2 5 mm day Chart shows how the GP1 SM200 controlled bed did not suffer the excessive irrigation that was evident in the grower controlled bed Chart covers 20 week summer period In the hot dry UK summer of 2006 a 590 m bed of Spiraea was grown in 3 litre pots with overhead irrigation controlled by a GP1 Logger and an SM200 Sensor This bed consumed 6096 less water than a comparable adjacent bed where irrigation was timed according to the grower s judgement The trials were conducted in the UK at Hillier Nurseries by Chris Burgess agronomist The GP1 Logger combined with a single SM200 Moisture Probe in a representative pot has proved very capable of automatically controlli
5. and easy Data logging The DL6 is a dedicated logger optimised for use with Profile Probes and other Delta T Moisture Sensors See page 15 For multi probe applications the DL2e Logger is ideal see page 16 ooil moisture content not just trends Low salinity and temperature sensitivity Portable meter option for convenient multi site measurement Dedicated DL6 Logger option for continuous monitoring Brief specification full specs on page 12 Range O to 0 4 mem 0 04 m m PR2 6 6 x O to 1 0V Bl PR2 4 4 x O to 1 0V Power 5 5 to 15V Bl PR2 6 120mA for 1s PR2 4 80mA for 1s Sensing depths PR2 6 10 20 30 40 60 100cm nominal PR2 4 10 20 30 40cm nominal Accuracy Output Sampling Vertically 95 sensitivity within 50mm of upper rings Horizontally 95 sensitivity within 200mm diameter PR2 6 1350 x 25 4mm diameter PR2 4 750 x 25 4mm diameter Sealing IP68 volume Access tubes Size ATL41 1154mm x 28mm diameter ATS1 554mm x 28mm diameter 1 Measures full range up to 1 0 m m with 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 d
6. ground The new detectors use an additional sensor in combination with a metal detector to locate buried objects In this trial the additional sensor was a ground penetrating radar which assists with the rejection of tiny fragments of metal As the radar s performance is affected by soil moisture content a ThetaProbe and HH2 Moisture Meter were used to monitor this throughout the trial www itep ws Land Management Impact on Soil Hydrology LaMa Ongoing work in the Lambourn catchment has involved the installation of PR2 Profile Probes to monitor the soll moisture of hillslope sites Both organic and conventional farming practices have been compared on cereals and pasture sites using measurements within the top 100cm of the soil profile The probes are logged using DL6 Data Loggers to provide continuous data recording supplemented by occasional instant probe readings taken with a PR2 and HH2 hand held meter combination This will enable catchment wide models to be developed and tested for plant water use overland flow and groundwater recharge Accurate soil moisture data in conjunction with soil hydraulic properties as well as meteorological measurements taken at each study site enable researchers to investigate the key hydrological processes occurring in the catchment As part of the study researchers from CEH Wallingford will be able to monitor the effect of land management changes on the soil moisture profile using
7. holes in the soil correct installation is vital for accurate measurement of soil moisture profiles 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 successfully 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 Augering Kit features The key components are 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 by hammering This new technique reduces the flexing that can produce air gaps around the access tube and minimises soil displacement Complete PR AKC1 augering kit a stabilisation plate b pilot auger c finishing auger d insertion rod e short and long acce
8. portable readings parameter Pore water Temperature conductivity EC oee graph on page 9 See graph on 0 to 50 C page 9 should be used for readings between 300 to 500 mS m and temperature from which water content and pore water conductivity are calculated soil immediately surrounding the rods Rods 68mm long x 3mm dia centre rod 5mm HH2 v WET Sensor EEPROM every 3 years depending on use supplied specialist calibrations are available for horticultural substrates see page 9 temperature directly within soils and substrates Soil water potential Matric potential 0 2 kPa SWT3 10 to 75 kPa ova SWTAR and SWT5 100 to 85 kPa No significant effect 0 to 50 C 1mV kPa Precision 10 6V 1 3nA IP68 Depends on soil Enquire for details GP1 v requires PBA1 DL2e Y requires TVB1 Interchangeable sensors Matric potential 10 kPa over O to 100 kPa 10 of reading from 100 to 1000 kPa Hysteresis effects may add 20 kPa to errors 50 to 400 mS m oalinity may affect readings in wetter soils 0 to 40 C 0 15 to 0 55V differential for to O to 1000 kPa 5 to 15V 20mA for 1s mee IP68 Depends on soil Overall 220 x 40mm diameter Weight 0 6 kg v GP1 DL6 v Individual sensor calibrations supplied Hecalibration advised every 2 year
9. relay 2A 2 relays 1A Readings stored 600 000 16 000 128 000 1 500 Recording rate 1 second to 24 1 second to 24 1 second to 24 hours hours hours Configuration DeltaLINK PC or DeltaLINK PC or Ls2Win By keypad Pocket Pocket DeltaLINK PDA DeltaLINK PDA option option Communication RS232 or modem RS232 or modem RS232 or modem RS232 options Sensor 1 switched 1 switched 2 relay switched 1 switched excitation logger power logger power logger or external battery 1 5V precision power reference Power 1 9V 6LR61 6 AA alkaline 6 AA alkaline 1 9V 6LR61 PP3 alkaline batteries batteries or PP3 alkaline lithium or external external power power 11 24V 7 15V Enclosure rating IP67 IP67 IP65 IP54 Temperature 20 to 60 C with 10 to 50 C 20 to 60 C Oto 40 C Range lithium battery Display 2 line x 16 2 line x 16 character character Size 140 x 105 x 180 x 160 x 280 x 220 x 125 x 80 x 45mm Omm 140mm 45mm Typical Monitoring soil Monitoring soil General data Instantaneous applications moisture moisture logging for reading of soil General data profiles moderate to moisture logging Controlling complex profiles WET Controlling irrigation systems Sensor irrigation Sensor compatibility maximum number of sensors that could be connected GP DLi6 Dl2 Meter Counters or Events v 2 v 1 v 2 60 J 1 J 1 v 2 Relay output With appropriate e
10. ET Sensor amp the ASIC which enables accurate measurement of permittivity and conductivity of the bulk soil or media Ordering information WET 2 d Sensor with 1 5m cable and 25 way D socket for use with HH2 WET 2 w Sensor with 5m cable terminating in bare wires for use with GP1 WET Kit including WET 2 d HH2 Moisture Meter manuals and carrying case As WET 2 K1 Kit plus WET GH 1 substrate calibrations uice JI APPLIED PLANT RESEARGH Specialist calibrations for WAGENINGEN pN horticultural substrates Applied Plant Research PPO peat based potting mix greenhouse mineral soils P O Box 167 6700 AD Wageningen The Netherlands and coir Cultilene Saint Gobain Cultil ne B V Zeusstraat 2 5048 CA TILBURG The Netherlands Web site www cultilene com WET 2 K1 oponsors of research into horticultural media applications WET 2 KA amp suppliers of horticultural media calibrations WET GH 1 Web site www ppo wur nl Developers of WET calibrations for horticultural media 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 whichever is greater E 22 E S E 2 c gt E o xe o o E j s o ES Oo ou 0 2 0 3 0 4 0 5 0 6 Soil water content 0 m m ET Sensor asurement The PR2 Profile Probe provides easy and
11. a logger or meter provide 5 15V DC at 20m4A and within seconds you can be measuring soil moisture The ThetaProbe s 1 accuracy stability and reliability have made it the preferred choice for thousands of researchers worldwide Calibration After a single two point gravimetric calibration ThetaProbes wil meet their full 196 accuracy specification for your chosen soil or other medium For convenience many users simply apply one of the two standard calibrations supplied by Delta T These generalised mineral or organic calibrations achieve 596 accuracy The ML2x has a predictable saline response and can be used even in very saline soils up to 2000 mS mr Data logging and readout Most types of data logger can provide the 5 15V DC required to power the ThetaProbe and wil accept its O 1V DC output signal The HH2 Moisture Meter connects to a ThetaProbe to provide a portable system for instantaneous readout of soil moisture see page 18 Installation F LF is EEE E 1 L h rM f My minimise water tracking Applications Typical application areas include Soil Science Agriculture Hydrology Civil engineering Pollution monitoring Forestry Wherever a soil moisture profile is required Profile Probes should be considered see page 6 but note that ThetaProbe accuracy is 196 compared to the Profile Probe 2496 Horticulture and agriculture ThetaProbes can be used in a wide range of
12. accurate soil moisture profiles 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 newly 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 Soil moisture profiles Agriculture Hydrology 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 pre augered 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 environ ments Reliable environmentally sealed IP68 connectors provide a wide range of cable length and connectivity options This flexibility makes sensor connection and disconnection quick
13. 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 enclosures are required The internal alkaline battery lasts for 1 year when taking hourly readings from 2 moisture sensors 2 temperatures and a raingauge or 3 years with a lithium battery The GP1 can be fully configured connections checked data collected and readings displayed in the field using a Windows Mobile PDA with the optional Pocket DeltaL INK software Versatile and dependable The GP1 has been designed particularly to log SM200 ML2x and WET sensors It is also compatible with other analog environmental sensors including RH temperature light and sunshine duration rainfall flow rate plus tensiometer and bridge sensors with the optional GP1 PBA1 bridge adapter board In addition a complete GP1 based weather station the WS GP1 is available Accessories The GP1 is available with a wide range of accessories and communication options including GSM modem systems and cable network options see page 17 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 GP1 PBA1 precision bridge adapter boards Ordering information Data Logger including DeltaLINK PC softwar
14. and high grade materials throughout to produce a soil moisture sensor of outstanding quality Applications Soil science Agronomy Horticulture and agriculture research Irrigation The body of the SM200 is only 86mm long allowing it to be placed in plant pots and other confined spaces The accuracy and affordability of the SM200 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 Calibration The SM200 is provided with general calibrations for mineral and organic soils A soil specific two point calibration can be performed for improved accuracy IP68 CONNECTOR l a amp 12l 1 2 BSP THREAD 40mm DIA w Good temperature and salinity stability Easy data logger connection DC in DC out Minimal soil disturbance easy to install Data logging and readout The SM200 is a dual purpose probe it can be used both with a hand held meter the HH2 Moisture Meter for instant readings and left in situ for data logging The SM200 is compatible with a wide range of data loggers irrigation monitors and controllers The GP1 Data Logger offers a particularly competitive logging solution accepting two SM200s two temperature sensors or two further SM200s and a raingauge Easy to use Versatile cabling solutions Easy installation at depth Compact can be use
15. ata to be collected at multiple sites Above PR2 6 Profile Probe with HH2 Moisture Meter Right PR2 4 Profile Probe Ordering information PR2 4 PR2 6 Profile Probe 40cm no cable Profile Probe 100cm no cable All Profile Probes are fitted with an IP68 connector and are supplied with user manual and protective tube Cable must be ordered separately Standard cables PRC d HH2 PRC M12 05 1 5m cable IP68 M12 connector to 25 way D socket Connects PR2 to HH2 Moisture Meter 5m cable IP68 M12 connectors Connects PR2 to DL6 Soil Moisture Logger 5m cable IP68 M12 connector to bare wire Connects PR2 to data loggers Extension cables EXT M12 05 EXT M12 10 EXT M12 25 5m cable IP68 M12 connectors Connects to PR2 or to any EXT M12 cable Cable is identical to item PRC M12 05 10m cable IP68 M12 connectors Cable connects to PR2 or to any EXT M12 cable 25m version of EXT M12 10 Access tubes and PR2 accessories ATS1 Short access tube includes cap bung and collar For use with PR2 4 Long access tube includes cap bung and collar For use with PR2 6 Profile Probe spares kit Protective carrying bag suitable for PR2 and HH2 Moisture Meter or Pocket PC Int Pat App WO 2006 064266 J J aqlda d Augering and Extraction Kits for optimal Access lube installation Profile Probes are used within access tubes inserted into augered
16. ation is valid Power 6 to 10V 38mA for 2 5s di i including coir peat based potting mixes oet solls and Is particu ary E and greenhouse mineral soils Dimensions Ed rs in mineral wool and other artificial RERUMS substrates Rods 68mm long dielectric properties which applies Sample volume 500ml E 2 1 Permittivity is a measure of the dielectric m Wa properties of materials e g soils and substrates Oran 2 Soil moisture accuracy refers to errors after Pool applying a soil specific calibration within 10 C of calibration temperature Yield and Quality of Tomatoes v ECp sikitisitisi Reduced Yields Hi s gt ond Lower Quality Lm GB Optimum EC levels Y X6 7x4 Lor d wih M CL ramos NAGIA GURE N 06 0004 MOLINA rry 0 QOO P 44 0004 4 2X mom LI rl ver remo p aw arn mos wow anew m0 os r nme enm ALA AX o ow tem 5 Pore water conductivity ECs m5 cm Irrigation events recorded with a WET Sensor connected to a GP1 Data Logger WET Kit For portable applications the WET Sensor is used with an HH2 Moisture Meter and is normally supplied as a complete kit see Ordering information Acknowledgements WET Sensors have been developed in co operation with PLANT RESEARCH INTERNATIONAL WAGEN ING ENPRE Plant Research International formerly IMAG BV P O Box 16 6700 AA Wageningen The Netherlands Web site www pri wur nl Designers of the W
17. bility High accuracy 8 channel data logging deal for Profile Probes ThetaProbes and SM200s Battery powered and waterproof IP67 Overview The DL6 can record data from 6 Soil water content sensors or other analog voltages Temperature sensor Pulse counter e g rainfall The DL6 is a dedicated soil moisture logger optimised for use with Delta T soil moisture sensors and can be used with combinations of ThetaProbes SM200s and Profile Probes as well as a temperature sensor and raingauge It is well suited to both research applications and irrigation monitoring Brief specification full specs on page 19 Voltage range 0 01 to 1 15V differential voltage Accuracy FI 0 396 x 0 3mV Resolution 0 2mV Applications Monitoring soil moisture Temperature 0 4 C Controlling irrigation Pulse counter 5Hz max uti f Relay output lt 25V DC AC 1A fuse deal logging solution for Sensor Switched battery 5 to 9V Profile Probes excitation 120mA max The DL6 is tough waterproof and its 6 internal AA batteries will last 1 year when taking hourly readings Profile Probes connect directly to the DL6 using the Reading 16 000 readings non storage volatile Connections 8 cable glands 8 way PR2 connector dedicated waterproof connector Set up RS232 connector Is very straightforward and software Environmental Waterproof IP67 configuration options fully support smart 10 to
18. 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 user manual PC software and RS232 cable If the HH2 is intended for use with a single ThetaProbe or a single WET Sensor it can be ordered as part of a convenient kit see pages 4 or 9 Brief specification full specs on page 19 Accuracy Resolution Reading storage Connection Environmental Size weight Battery type life Zero to saturation soil water content O to 1 5V voltage range 0 13 of mV reading 1 mV 1mV Typically 500 to 1500 readings depends on sensor and settings 1 x male 25 pin D connector used for sensor and RS232 communications IP54 O to 40 C operating 150 x 80 x 40mm 450g 9V alkaline 6LR61 PP3 5 000 readings Logger specification and comparison table GP1 DL6 DL2e HH2 Meter Input 2 voltage 6 voltage 15 analog digital connections channels channels channels expandable to 2 temperatures 1 temperature 30 45 60 1 water content or 2 additional see detailed sensor or 1 WET SM200 Sensors data sheet Sensor 2 counters 1 counter 2 counters S3kHz amp 50Hz expandable Control outputs 1 smart relay 1A 1 smart
19. d in plant pots The SM200 minimises soil disturbance preserving the original soil structure It is easy to insert and install whether at the Soil surface or at depth The SM200 s circular shape allows it to be installed in augered holes a low cost insertion rod is available Convenient interchangeable cables are available for the SM200 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 Brief specification full specs on page 12 O to 0 5 m m N 30 09 eq Oto 1 0V A 5 to 15V 12mA for 1s Range Accuracy Output Power Sample vol 55 x 7Omm diameter Size see diagram Sealing IP68 including connector 1 measures full range up to 1 0 m m with reduced accuracy 2 corresponding to O to 0 5 m m Int Pat App WO 2006 064266 Ordering information SM200 SM2C w 05 EXT M8 05 EXT M8 10 EXT M8 25 SM2C d HH2 ML2 AG1 SL SM INRD1 SM200 Soil Moisture Sensor 5m bare ended cable for data logger connection 5m MB extension cable 10m M8 extension cable 25m MB extension cable 1 1m cable to connect SM200 to HH2 Meter 45mm diameter spiral auger to install SM200s at depth length 1 2m 1m insertion rod to insert SM200 in augered holes Can be cut to shorter lengths or inter connected for longer lengths Soil Water Potential matric potential oggable water filled pr
20. e IP68 PR2 rod when IP68 installed in access tube Sample volume 55 x 70mm diameter 60 x 30mm diameter 95 sensitivity within a cylinder of radius 100mm 500ml Sample volume is weighted towards soil immediately surrounding the rods or rings Sample volume is weighted towards Overall 140 x 40mm dia Overall 210 x 40mm dia PR2 6 length 1350mm Dimensions and Rods 51mm x 2 5mm dia Rods 60mm x 3mm dia PR2 4 length 750mm Overall i Both 25 4mm diameter 120 x 45 x 12mm Weight O 1 kg excluding cable Weight 0 5 kg PR2 6 1 2 kg PR2 4 0 8 kg Weight O 1 kg Logger Meter HH2 v DLEY Di2ev compatibility DL2e v HH2 v GP1 v Sensor Individual sensors are interchangeable a E calibrations EE Hecalibration advised Soil calibrations Generalised Mineral Generalised Mineral and Organic soil calibrations are supplied Organic Sand and Clay calibrations are weight Applications High quality sensor suited to Versatile high accuracy sensor Provides rapid moisture content research and irrigation recognized as the gold readings in a vertical soil profile Measures pore water applications a cost effective standard for the precise Used in access tubes Tor easy ee ae insertion and removal Can be conductivity moisture alternative where ML2x determination of soil moisture left installed for data logging or Ee accuracy is not required content used with the HH2 for multi site
21. e and RS232 cable GP1 MP1 Mounting Kit with fittings for 51mm tube or flat surface GP1 LID2 Expansion Lid providing 4 further cable glands GP1 EPC1 GP1 PBA1 External power cable Precision bridge adapter board Smart irrigation control E Brief specification Voltage range Accuracy M Resolution Temperatures Pulse counters Relay output Sensor excitation Reading storage Connections Environmental Size weight Battery type life 0 2 to 2 7V differential 0 05 1 6mV O 1mV 0 13 C 1 x 50Hz 1 x 33kHz max 30V DC or 24V AC 1A fuse Switched battery 5 to 9V 120mA max or precision 5V 50mA max gt 600 000 readings non volatile 4 cable glands 5 way RS232 external power connector Waterproof IP67 20 to 60 C with lithium battery option 140 x 105 x 45mm 280g 9V 6LR61 PPS 1 year with alkaline 3 years with lithium battery option 1 Accuracy applies over full 20 to 60 C 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 he DL6 Data Logger is a dedicated soil moisture logger with smart moisture control capa
22. ect sizing of solar panels for specific geographical locations Soil Moisture Measurement The HH2 Moisture Meter provides instant readout from most Delta soil moisture sensors Immediate display of water content Store up to 1500 readings Reads ML2x SM200 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 Reads ML2x SM200 and WET Sensors Reads PR2 6 and PR2 4 Profile Probes Simple 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 110 255 Data is transferred to a PC using the RS232 cable provided with each unit 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 profile large areas quickly The HH2 auto detects the number of sensors in each Profile Probe Reading WET Sensors The HH2 is able to display
23. ent The WET Sensor type WET 2 measures three vital soil properties Water content Electrical Conductivity EC and Temperature Moisture and nutrient status in the root zone Rapid monitoring of growing conditions Calibrations for many soils and substrates NEW Logging option The WET Sensor can now be connected to the GP1 Data Logger in order to monitor fluctuations in growing conditions over time The smart control relay capability of the GP1 is fully enabled The WET Sensor is used throughout for the WET Sensor so the system may horticulture especially by soft fruit be configured to control water content growers and for crops grown in and or EC or temperature using its powerful built in control capabilities Applications Horticulture Agriculture Soil science Pollution monitoring Rapid checks on growing conditions The WET Sensor 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 protected environments where correct growing conditions are critical to both yield and flavour The compact sensor Brief specification can be inserted directly into the full specs on page 12 less than 5 seconds and provides 3 of the graning EEUN with minimal most important indicators of root zone disturbance to either roots or shoots health water content pore wa
24. essure transducer tensiometers Maintenance free wide range Equitensiometers Tensiometers type SWTS SWT4 SWT4R and SWT5 These precision water filled ceramic cup tensiometers have good accuracy 0 2 kPa over the range 100 to 85 kPa SWT tensiometers require refilling and degassing after dry periods and must be protected from frost The SWT3 is a general purpose low cost model SWT4 and SWTAR have improved performance and better frost resistance The SWT4R refillable version can be filled and emptied in situ The SWT5 is a miniature version that can be used for plant pots etc The tensiometers require a stabilised 10 6V DC 1 3mA power source A DL2e Data Logger fitted with a TVB1 Voltage Hegulator can power and log up to 30 tensiometers or 60 with special cable arrangements Alternatively a GP1 fitted with 1 or 2 GP1 PBA1 boards can log 1 or 2 tensiometers For use in drier soils 85 kPa or at remote sites the Equitensiometer should be considered EQ2 Equitensiometer The Equitensiometer makes clever use of the ThetaProbe to obtain readings without the familiar problems of water filled tensiometers The ThetaProbe rods are embedded into a specially formulated porous matric material The EQ2 is compatible with most data loggers including all Delta T loggers and the HH2 Moisture Meter Extension tubes can be used to position EQ2s at depth The EQ2 is maintenance free no refilling degassing or
25. fined cylindrical zone of measurement 60mm long x 30mm diameter Made of 3mm diameter resilient 304 austenitic stainless steel with sharpened tips Rods have threaded ends that screw into ThetaProbe body The exposed rod length is 60mm The ThetaProbe casing is a 40mm diameter tube with threaded end Extension tubes 0 5 and 1 0m screw onto this thread Case sealed to IP68 Overall length is 210mm Thousands of ThetaProbes are in use all over the world The ML2x design and performance have been refined over many years Advantage Dual purpose for burial and data logging for hand held use Long cable runs possible Easy to include in large scale logging set ups Performs well in most soil types including clays Usable in saline soils up to 2000 mS m 1 accuracy Holds soil closer to central rod in case of drying and cracking 2 and 3 rod sensors and particularly flat pcb sensors don t do this Measurements can be made close to the soil surface Withstand repeated insertion in soil Can be replaced at low cost if bent or damaged Highly resistant to corrosion Sharp narrow rods minimise errors due to soil compaction by the rods Easy to insert and remove from augered holes Rapid attachment of extension tubes Handy size for portable use Rugged waterproof and buriable to 5m Worldwide availability Reassurance of quality
26. g in 25 way D connector for HH2 meter 2m cable ML2x t 05 ThetaProbe terminating in IP68 connector for use with extension tubes 5m cable ML EX50 ML EX100 ML RODS 2 Pack of 12 spare rods Older ThetaProbes need modification 0 5m extension tube 4 1 0m extension tube 4 ML INK1 Insertion kit for pre forming holes in hard soils ML2 AG1 SL 45mm dia spiral auger to install ThetaProbes at depth length 1 2m TK3 BASIC Thetakit portable soil moisture kit includes ML2x d 02 pack of 4 spare rods HH2 Meter insertion kit manual and case 3 Other cable lengths available in multiples of 5m up to 100m e g ML2x w 25 4 ML2x d is not suitable for use with extension tubes use ML2x t instead Outstanding performance for demanding applications What do you gain when you choose the ThetaProbe Description DC in DC out i A 100MHz signal 4 Rod arrangement Replacement rods Compact cylindrical shape Delta T support AT Requires 5 15V DC at 20mA Provides 0 1V DC output differential Compatible with HH2 Moisture Meter and most data loggers With frequencies below 30MHZ salinity effects can be a problem With frequencies above 250MHZz measuring bound water in clay soils is a problem 100MHZ is an excellent compromise 3 rods are arranged in a circle around a central rod This creates a de
27. il Moisture Sensor Specifications MES Soil water content Multi PR2 j WET Sensor Measurement Volumetric water content Volumetric water content Volumetric water Volumetric water content sam content 0 03 m m 3 Accuracy 0 03 m3 m 3 0 01 m3 m 1 0 04 m m 4 With soil specific calibration range 0 to 0 5 m m 0 05 to 0 5 m3 m 0 to 0 4 m m Full accuracy over 0 to 1 0 m3 m Full range O to 1 0 m3 m Full range O to 1 0 m m Full range 01010 5 mim 0 to 300 mS m 7 50 to 500 mS m 50 to 400 mS m 50 to 400 mS m oalinity errors 0 035 oalinity errors 0 035 oalinity errors included m m from 0 to 0 4 m3 m TP m from 0 05 to 0 4 in specification Supplied with Salinity range extended range calibrations which m mx3 Can be calibrated UP tO Z COOMO Temperature Full accuracy over Full accuracy over Full accuracy over range 0 to 60 C enm 0 to 40 C 0 02 m3 m over 40 to 10 C 0 to 50 C Serial TTL data providing permittivity bulk conductivity 0 to 1 0V single ended 0 to 1 0V differential 0 to 1 0V differential Corresponding to 0 to 0 6 m3 m PR2 6 x6 outputs PR2 4 x4 Power 5 to 14 V 12mA for 1s 5 to 15V 20mA for 1s 5 5 to 15V requirement PR2 6 120mA for 1s 6 to 10V 38mA for 2 5s 0 2s warm up at reduced Minimum 5 5V with 100m Minimum 7 5V with accuracy cable 100m cable Environmental IP68 IP68 IP67 handi
28. luding software quick start guide and and collect and display data connectiontabie lll The optional Pocket DeltaL INK software PDLK1 M8 Pocket DeltaLINK Kit for upgrade provides full functionality for GP1 as above Windows Mobile PDAs including sensor i Windows Mobile PDA reading and data graphing l 1 Connection cable suits iPAQ hx2190 hx2000 and NB DeltaLink software is not compatible other PDAs with compatible RS232 serial port sockets with the DL2e Logger Accessories for Delta T data loggers Modem networking and GP1 and DL6 modem systems l Battery d GSM Mod direct cable connections Le E d communications systems can be used to Batteries and solar extend the range of GP1 and DL6 Logger recharging systems applications These systems can be Complete mast kits integrated into GP1 or DL6 networks Enclosures for building GP1 and DL6 networks GP1 and DL6 Loggers can be connected together in a GP1 cable network A range of network cables and junction boxes allow GP1 and DL6 users to optimise logger computer power supply and modem connections Up to ten GP1 or DL6 Loggers may be connected to each network complex systems Batteries and solar recharging Additional 12V batteries with capacities ranging from 1 8 Ah to 115 Ah can be supplied complete with solar recharging if required Delta T can assist with calculating the power requirements for any combination of sensors and loggers including the corr
29. ng irrigation on commercial scale production beds at several nurseries using overhead sprinkler or drip irrigation As well as seeing improved crop quality growers benefited from lower labour cost reduced environmental impact and significant water savings Pulsed irrigation during a wetting up period can be introduced with the GP1 software if needed to allow soak in periods and reduce pot drainage losses that can occur with high output sprinklers Contents Introduction to Bs M Devices Applications examples ML2x ThetaProbe SM200 Soil Moisture Sensor Soil Water Potential Sensors WET Sensor Profile Probe amp Insertion Kits Sensors Specifications all GP1 Data Logger DL6 Data Logger DL2e Data Logger DataL INK Software and logger accessories 17 HH2 Moisture Meter 18 Logger Specifications combined 19 Ordering Information 20 e Applications AE Soil Moisture Measurement The ML2x ThetaProbe measures volumetric soil moisture to within 196 The ML2x is known worldwide for its accuracy reliability and ease of use 1 accuracy Easy data logger connection DC in DC out Excellent temperature and salinity stability Dual purpose either hand held for spot readings or left in situ for data logging World class performance With the ThetaProbe type ML2x it s easy to make reliable accurate soil moisture measurements Simply insert the probe into the soil connect to your dat
30. ntees its products against defects in manufacture or materials for a period of 12 months from the date of delivery Full details including terms and conditions of sale and arrangements for servicing and recalibration are available on request AT Delta T Devices www delta t co uk Delta T Devices Ltd 130 Low Road Burwell Cambridge CB25 OEJ UK T 44 0 1688 742922 F 44 0 1638 743155 E sales delta t co uk Co operatively owned and managed Other Delta T Products As well as sensors for soil moisture measurement Delta T specialises in instruments for Meteorology Solar radiation studies Canopy analysis Leaf area index Plant physiology Environmental Monitoring and our products include Weather stations Sunshine Pyranometers Data loggers Porometers Canopy analysers Root length systems Image analysers for leaves GP1 Data Logger controlling precision gantry irrigation within a glasshouse at Hillier Nurseries The GP1 is connected to a single SM200 Soil Moisture Sensor installed in a representative pot Representative SMM 01 08 Printed in U K
31. relays switching 1A 24V Sensor 2 relays switching battery Voltage Regulator provides a excitation or external power stabilised 10 6V DC Reading storage 128 000 readings Easy software Connections 13 pluggable screw l i l connector blocks The DL2e is supplied with the Ls2Win 56949 amd extermal software for configuring logging sessions power managing sensor libraries graphing real Display 2 line LCD time readings and collecting stored data 9 9 Environmental Weatherproof IP65 The built in DL2e keypad and display can 20 to 60 C be used to test sensor connections in the Size weight 280 x 220 x 140mm field and to check logging status 2 7kg Battery type 6 alkaline AA cells NB The DL2e is not compatible with life 1 year quiescent DeltaLink software B Accuracy applies over full 20 to 60 C DeltaLINK PC software enables full configuration and data collection for GPT and DL6 data en from a PC or laptop Clear graphic data display Full configuration options A s Supports powerful n Mer em irrigation control features gt e Pocket DeltaLINK provides the same full functionality using a Windows Mobile PDA DeltaLINK PC software is supplied free with all GP1 and DL6 data loggers and enables you to set up the logger input Ordering information channels and recording parameters PDLK1 M12 Pocket DeltaLINK Kit for check readings from connected sensors DL6 inc
32. s depending on use No soil calibrations required Precision trusted range of tensiometers for use in wetter soils well suited to irrigation scheduling and the study of water uptake movement They require regular maintenance No soil calibrations required Maintenance free dielectric tensiometer that can be left installed even in frozen soils Best results in dry soils but readings are lower accuracy than water filled tensiometers d C OQ Q Q Q V E Q v C Q Soil Moisture Measurement The GP1 Data Logger is a compact research grade data logger with smart irrigation control capability High accuracy channel data logging Smart relay suitable for irrigation control Waterproof IP67 enclosure 600 000 readings Overview The GP1 can record data from 2 Soil water content sensors or other analog voltages 2 Temperature sensors or 2 further SM200 sensors 2 Pulse counters e g rainfall or water meter WET Sensor The GP1 provides a complete solution for recording high accuracy soil moisture data in the field Its powerful control Capabilities and simple software interface make it easy to configure the GP1 either as a stand alone irrigation controller or for adding soil moisture sensing to existing control systems Applications Monitoring soil moisture General data logging Controlling irrigation Ease of use The GP1 is very simple to set up
33. soils composts and other growing media They can be inserted into plant pots or may be positioned horizontally in a seed tray minimum 50mm depth of compost Composting The ML2x can be used in composting material where it can tolerate temperatures up to 70 C The accuracy between 40 and 70 C is 2 but media density and contaminant levels may affect the accuracy and the probe s lifespan Environmental monitoring Soil water is increasingly seen as one of the critical components for long term studies of global climate and local environments Many automatic weather stations can be expanded to include one or more ThetaProbes ThetaProbes are robust buriable and maintenance free They can beinserted into augered holes or positioned in the wall of a trench 495 which is then carefully back filled Optional extension tubes assist JH w convenient placement and lt removal when burying at depth Access holes should be angled to Brief specification full specs on page 12 Range O to 0 5 m3 m 1 Accuracy 0 01 m m Output O to 1 0V 2 Power 5 to 15V 20mA for 1s Sample vol 60 x 30mm diameter Size 210mm x 40mm diameter Sealing IP68 1 Measures full range up to 1 0 m m with reduced accuracy 2 Corresponding to O to 0 5 m m Ordering information ML2x w 05 8 ThetaProbe terminating in bare wires for data logger terminal blocks 5m cable ML2x d 02 ThetaProbe terminatin
34. ss tubes not part of PR AKC1 Extraction Kit The 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 Augering kit selection PR ASK1 S Starter Kit short PR ASK1 L Starter Kit long PR AKC1 Complete Kit Soil type and depth Normal soils up to 40cm depth Normal soils up to 1m depth For dry sandy soils the PR AUG2 25mm spiral auger should be ordered in addition to the selected augering kit Only the complete kit includes a carrying bag All augering items can be ordered individually Key v Meets basic need VY Well suited vvv Well suited amp includes items for extra convenience X Unsuitable Ordering information PR ASK1 S Augering starter kit short For short access tube installation only includes 24mm pilot auger stabilisation plate access tube insertion rod and user manual 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 Q O wl Q O re Q N rc Q Soil Moisture j ii So
35. ter and provides information for process Permittivity lt 1 to 80 2 5 conductivity Cp and temperature C optimisation or checking growing Bulk 0 to 300 mS m 10 The sensor is particularly useful in condition uniformity conductivity ECL horticulture for monitoring and correcting for variations when applying fertigation CHF or organic treatments Temperature 5 to 50 C 1 5 C The WET Sensor can also be used to monitor the build up of salinity when irrigating with poor quality water though Calculated parameters Volumetric Soil Pore water conductivity it should not be used in conditions of l Moisture 9 Oto 100 396 Pl The WET Sensor is able to calculate pore high salinity see graph opposite water conductivity ECp which is the EC Pore water see graph below i conductivity ECp of the water WOE o plant roots The Horticultural media ECp calculation is derived from an calibrations Other specifications approximate relationship between The WET Sensor is supplied with default Calibration Individual sensor T calibrations stored within calibrations for generic mineral organic Sensor EEPROM particularly well to WET Sensor readings sand and clay soils Special WET GH 1 output Sox osa NEN are taken at me lis frequency substrate calibrations can be ordered as ERE BIET za the same defined region of a set for a variety of horticultural media nvironmenta Oto soil substrate The approxim
36. 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 pemittivity 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 Special WET GH 1 substrate calibrations can be ordered as a set for a variety of horticultural media including coir peat based potting mixes and greenhouse mineral soils 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 otandard calibrations for generalised mineral and organic soils are supplied with the HH2 for use with the ThetaProbe Profile Probe and SM200 Sensors The HH2 also enables up to 5 extra user defined soil calibrations to be characterised and stored The soil calibration
37. topping up low power and is not harmed by frost or by long term burial so it is very convenient for remote sites The EQ2 achieves best accuracy over the range 100 to 1000 kPa which makes it well suited to plant water stress studies even in very dry soils However the EQ2 is not a rapid response high accuraoy device covering the full range of water potentials Under some circumstances the EQ2 equilibration time may extend to several days Applications Soil science Agronomy Horticulture and agriculture research Ordering information EQ2 w 05 EQ2 terminating in bare wires for data logger terminal blocks 5m cable SWT3 s30 Basic water filled tensio meter with 30cm shaft Pl SWT4 s30 Higher specification water filled tensiometer with 30cm shaft 2 SWTAR s30 Refillable version of SWTA PI SWT5 s07 Miniature water filled tensio meter with 7cm shaft SI All SWTs are fitted with a 1 5m cable and connector An SWTCC connecting cable must be ordered with each SWT Lengths of 5 10 and 20m are available 1 See ThetaProbe page 4 for note on EQ2 cable lengths and details of extension tubes and augers 2 SWT3 and SWT4 tensiometers can be fitted with other shaft lengths minimum 5cm up to 200cm max 8 SWT5 can be fitted with shaft lengths 2 to 20cm Comparison of matric potential ranges Sensor Type EQ2 SWITs 10 Suction kPa log scale Soil Moisture Measurem
38. vice that we provide Their feedback is incorporated into many of our product designs to create a process of continuous improvement Policy Statement We have adopted the following statement to explain our sales policy VVe 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 Applications Landmine Detection The ThetaProbe was used in an ITEP project to assist in the testing of a multisensor mine detector ITEP is the International Test and Evaluation Program for Humanitarian Demining and its mission is to develop standards test materials and methods and spread this knowledge to interested parties ITEP contributes to the resolution of the global landmine problem by developing better safer and more cost effective equipment and methods Despite the ban on production stockpiling or use of anti personnel landmines they still pose a threat to people living and working in affected areas such as Mozambique Bosnia and Cambodia New multisensor detectors aim to reduce the number of false alarms faced by a deminer using a traditional metal detector by reducing sensitivity to the thousands of tiny fragments of metal often found in the
39. x systems The DL2e is well suited to projects requiring large scale soil moisture records When fully expanded it can read 60 ThetaProbes 10 PR2 6 Profile Probes 60 SM200 sensors or up to 30 tensiometers Expandable platform The minimum DL2e system can be quickly adapted by adding extra cards that expand the capabilities of the basic logger The range of expansion cards covers most common analog sensors and many digital ones The SWT range of tensiometers can be used with the DL2e if it is fitted with a TVB1 Voltage Regulator There is a wide range of mounting options power supplies communication Systems and enclosures available for creating complex logging systems However the DL2e is also portable weatherproof battery powered and easy to set up so it s also an excellent choice for quick and simple logging tasks Brief specification full specs on page 19 Ordering information Data Logger including 15 30 analog channels 128k memory Ls2Win software and RS232 cable 15 30 Channel Analog Input Card Voltage range 4mV 32mV 262mv 2 097V Accuracy Pl 0 296 Resolution 1uV 8yV 64yV 0 5mV Resistance 1kQ 10kO0 100kO 1MO ranges Accuracy 0 1 x0 696 to 50 C on lowest range 12 Channel 4 Wire Input Card 15 Channel Counter Input Card 30 Channel Attenuator Card as LPR1 added transorb input protection Resolution 0 01 lowest range Counters 100Hz max Relay outputs 2
40. xpansion cards and power supply arrangements Soil Moisture Measurement Ordering Information UK customers SALES AND TECHNICAL ENQUIRIES should be made directly to Delta T in the UK PRICES are available on request and a detailed quotation can be provided if required 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 Customers outside the UK 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 more than three quarters of our business and we have many years experience of dealing with enquiries from overseas clients PRICES are available on request 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 facilities 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 guara
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