Campbell Scientific offers soil water potential sensors that measure soil water potential via two methods: heat dissipation or electrical resistance. The sensors determine the energy status of the water in the soil, which describes the force that holds the water in the soil.
The 229 is a sensor that measures soil water potential from -10 to -2500 kPa. It requires connection to either the CE4 or CE8 current excitation module. A Campbell Scientific datalogger controls the c...read more
The 257, manfuactured by Watermark, is a solid-state, electrical-resistance sensing device with a granular matrix that estimates soil water potential from 0 to -200 kPa (typically wetter or irrigated...read more
