229-L

The 229 measures soil water potential. The sensor consists of a heating element and thermocouple encased in a porous ceramic matrix. To calculate soil water matric potential, the 229 applies a current to the heating element, and the thermocouple measures the temperature rise. The magnitude of the temperature rise varies according to the amount of water in the porous ceramic matrix, which changes as the surrounding soil wets and dries. It only takes 30 seconds for the 229 to make this measurement.

229-L Benefits Compatible with most Campbell Scientific dataloggers Measures a wide range of matric potential Measurement is not affected by salts in the soil Long lasting, with no maintenance required

Case Studies Montana: Acid Rock Drainage Monitoring