Inspect and verify the sensor components (TEROS-11 Soil Moisture and Temperature or TEROS-12 Soil
Moisture, Temperature, and Electrical Conductivity). The TEROS verification clip gives the best assessment of proper sensor function and accuracy. The TEROS-11/12 should read 0.332 to 0.363 m3/m3 on the verification clip. If a verification clip is not available, test basic sensor functionality in air and water. The TEROS-11/12 will read ~0.70 m3/m3 in water and a slightly negative value in air.
Note: The sensors are optimized to read in soils, therefore the sensor will not read 100% in pure liquid water. Values above use the mineral soil calibration.
Proper installation of the sensors is critical for proper operation. Refer to the TEROS-11/12 User Manual for details.
For easy installation, use the borehole installation tool. The installation tool (shown below) is available for rent from us. Contact Customer Support for more information.