SONBEST SM2901M FDR high-precision 4-20mA four soil moisture

SM2901M soil moisture sensor as long-distance transmission of soil moisture sensors, long buried in the soil and dams used for surface and deep soil moisture sentinel surveillance and on-line measurements, also called farmland moisture detector. Using 4-20mA ,0-5V or RS485 interface to a variety of industrial universal, direct access to a variety of display devices, to achieve soil moisture monitoring. And data collection with the use of water as a sentinel surveillance or mobile measurement instruments.