Fulwell Golf Course, Middlesex
- Rapid, accurate measurement of water content in soil
- Used by many of the world’s leading golf courses and sporting venues
- Soil moisture with ± 1% accuracy
Supplied in a convenient carry case, the ThetaKit (based around the ML3 ThetaProbe Soil Moisture Sensor) contains everything you need to obtain accurate soil moisture measurements.
The kit comes complete with a dedicated HH2 Moisture Meter for instant readout, an insertion tool for penetrating hard soils, and a set of spare replacement rods. With a proven reputation for reliability and robustness plus class leading 1% accuracy, the ML3 continues to set the standard for fast, easy soil moisture measurement.
Video – Using the ThetaKit to optimise turf health and playing surface quality
Sports Turf User Guide – co-authored with the STRI
The leading international sports turf consultancy, STRI (Sports Turf Research Institute), provides independent advice to around 2,100 sports clubs and leisure facilities every year. Delta-T Devices has partnered with the STRI to produce a ThetaKit User Guide. This 8 page guide makes extensive use of photos and diagrams to help greenkeepers and other sports turf professionals make the most of their ThetaKit.
Click here to download the guide.
ThetaKit – the ideal tool for turf professionals
For over fifteen years the ThetaProbe Soil Moisture Sensor has gained a reputation among scientific researchers worldwide for its accuracy, stability, and robustness. This research grade performance is now available to turf managers – offering an unrivalled level of accuracy for the determination of soil water content.
With the ThetaKit it is possible to rapidly check irrigation uniformity and turf characteristics. Regular measurement of soil moisture content allows continual assessment of grass health – giving early warning of potential problems and enabling the turf manager to take preventative action – before damaging physical change in the turf has occurred.
Use the ThetaKit to:
- Spot check soil moisture content quickly and easily
- Identify areas too dry or too wet before turf problems become visible
- Quantify background levels of water content that underpin good turf performance
- Schedule optimised irrigation
- Check the performance of automatic sprinklers and the uniformity of water application
Please note that although the ML3 has a built in temperature sensor, temperature can only be recorded if the probe is connected to a data logger (and the probe is fully buried). The HH2 Meter is unable to provide temperature indication.
Highly accurate yet very easy to use
With the ML3 ThetaProbe Soil Moisture Sensor it’s easy to make reliable, accurate soil moisture measurements. Simply insert the soil moisture probe into the soil, switch on the HH2 readout meter, and within seconds you can be logging soil moisture.
|Measurement||Volumetric water content and soil temperature|
|Accuracy||± 0.01 m3.m-3 (1%) |
With soil-specific calibration
|± 0.5°C (0 to 40°C for temp sensor)|
± 0.75°C (-20 to +60°C for temp sensor)
|Soil moisture measurement range||Full accuracy over:|
0 to 0.5 m3.m-3
|Full range : 0 to 1.0 m3.m-3|
|Salinity range||50 to 500 mS.m-1|
|Salinity errors < 0.035 m3.m-3 from 0.05 to 0.4 m3.m-3. Can be calibrated up to 2000 mS.m-1|
|Temperature range||Full accuracy over: 0 to 40°C|
|Output||0 to 1.0 V differential|
Corresponding to 0 to ~0.6 m3.m-3
|Resistance 5.8Ω to 28Ω for temp sensor|
|Power requirement||5-14 V, ~18 mA for 1s|
|Minimum 5.5 V with 100 m cable|
|Environmental||IP68 (-40 to +70°C)|
|Sample volume||~60 x 30 mm diameter|
|Sample volume is weighted towards soil immediately surrounding the rods|
|Dimensions and weight||Overall: 158 x 40 mm diameter |
Rods: 60 mm x 3.2 mm diameter
(Rods are replaceable)
Weight: 0.1 kg (exc. cable)
|Sensor calibrations||Individual sensors are interchangeable|
Recalibration advised every 3 years (depending on use)
|Soil calibrations||Generalised Mineral and Organic soil calibrations are supplied|
|Input connections||1 water content sensor or 1 WET Sensor|
|Communication options||RS232 / USB |
|Sensor excitation||1 switched battery|
|Power||1 9V 6LR61 (PP3)alkaline|
|Battery life (dependent on usage)||~ 5,000 readings|
|Temperature range||0 to +40°C|
|Display||2 line x 16 character|
|Size||125 x 80 x 45mm|
|Typical applications||Instantaneous reading of soil moisture / proﬁles/ WET Sensor|