SM1 Soil Moisture Sensor
Soil moisture and temperature
The SM1 soil moisture probe is an extremely flexible system, offering capacitance based measurement of soil moisture plus temperature monitoring.
Available in a variety of lengths, starting with 30cm and ending at
150cm, the SM1 features one soil moisture sensor every 10cm. As
installation method both access tube and slurry installation are supported.
The sphere of influence of the sensor rings is approx. 10cm in radius around
the access tube.
Depending on the length of the sensor up to 5 temperature sensors are available. The 30, 60, 90, 120 and 150cm
probes have their first temperature sensor located at 15cm and every additional sensor with a spacing of 30cm, thus at
45, 75, 105 and 135cm respectively.
All signals are delivered through the SDI-12 protocol. To connect a standard 2, 4 or 8m cable the Probe features a 7-pin
Binder jack with IP67 rating.
- Geological observations
Leaflet - SM1 Soil Moisture Sensor
|Measuring range soil moisture||0 ... 100% Vol|
|Measuring range temperature||-20°C ... +60°C|
|Accuracy||+/- 2% (with site specific calibration +/-1%)|
|Lengths||30, 60, 90, 120, 150cm|
|Number of soil moisture sensors||One every 10cm on all versions|
|Number of temperature sensors||30cm sensor: 1 at 15cm |
60cm sensor: 2 at 15 and 45cm
90cm sensor: 3 at 15, 45 and 75cm
120cm sensor: 4 at 15, 45, 75 and 105cm
150cm sensor: 5 at 15, 45, 75, 105 and 135
|Power supply||5.5 ...12VDC|
|Connector||7-pin male Binder connector M9|
|Tube diameter||32mm (1.25")|