ML2 ThetaProbe Soil Moisture Sensor
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Downloads
Brochure
Manual
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 With the ThetaProbe it's easy to make reliable, accurate soil moisture
measurements. Simply insert the probe into the soil, connect to your data
logger or meter, provide 5-15V DC at 20mA, and within seconds you can be
logging soil moisture.
ThetaProbes are robust, buriable and maintenance free. They can be
easily installed at depth in the soil by inserting them into augered
holes using the optional extension tubes.
Features
- ±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
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Specifications
Accuracy/Range
±0.05 m3/m3 (5%): 0 - 70°C, using “general” soil
calibrations supplied. ±0.01 m3/m3 (1%): 0 - 40°C, after
calibration to a specific soil type
Calibration
Not necessary for normal operation each sensor is factory
calibrated for either organic or mineral soils
Response Time
Electrical: <0.5s to 99% of change
Environmental
Operates over -10 to +70°C without damage buriable
up to 5m (15 ft.) deep in soil or water
Input/Output
Requires 5 - 15V d.c. at 15 mA (typical). Output range:
0-1V d.c. for 0-0.5 m3/m3 moisture
Dimensions
Rods 2.36 in. (60 mm), overall length 8.15 in. (207 mm) including pins |
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