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Agrology / Ecology
- ML3 ThetaKit
- Product Detail
- Company Profile
The ML3 ThetaKit provides researchers with a portable tool for highly accurate, near instantaneous measurement of moisture levels in soils and substrates.
The ThetaKit is easy to use. Simply switch the connected HH2 Moisture Meter on, insert the probe pins fully into the soil, and press the HH2’s “read” button to display the moisture measurement. Readings can then be stored with a single button press (if required) – and downloaded to PC later.
The kit comprises an ML3 ThetaProbe Soil Moisture Sensor, an HH2 Moisture Meter (readout unit), replacement sensor rods, and a carry case
| 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) |
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| 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 |
HH2 Meter
| Input connections | 1 water content sensor or 1 WET Sensor |
| Control outputs | – |
| Readings stored | 1,500 |
| Recording rate | – |
| Configuration | By keypad |
| Communication options | RS232 / USB [1] |
| Sensor excitation | 1 switched battery |
| Power | 1 9V 6LR61 (PP3)alkaline |
| Battery life (dependent on usage) | ~ 5,000 readings |
| Enclosure rating | IP54 |
| 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 |
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Channel science and technology has been dedicated to the teaching, scientific research and the sales, research and development of applied instruments in the fields of soil, plants, environment, hydrology, meteorology and animal physiology, ecology and environmental hydrology for many years.
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