FirstRate FST100-2006E Soil NPK Sensor 316L Stainless Steel, 0-1999mg/kg, RS485 Output

The sensor communicates via a standard RS485 interface using the Modbus RTU protocol. This allows for reliable, long-distance data transmission and easy integration with Programmable Logic Controllers (PLCs), data loggers, and most industrial or agricultural monitoring systems that support Modbus.

The sensor requires a DC power supply between 12V and 24V. It is connected via its integrated 1-meter cable, which typically includes wires for power (V+, GND) and the RS485 data lines (A, B). Always refer to the specific pinout diagram for your unit to ensure correct connection to your controller or RS485 converter.

Yes, the FST100-2006E is designed for permanent field deployment. Its probe is constructed from 316L stainless steel, which provides excellent corrosion resistance against soil chemicals and moisture. The robust housing and sealed electronics ensure reliable operation in harsh outdoor environments.

The sensor outputs pre-calibrated digital values via Modbus. The register map provided by the manufacturer will specify which holding registers contain the N, P, and K concentration values in mg/kg. No user-side calibration is typically required, but the sensor should be installed according to guidelines (e.g., proper soil contact) for accurate readings.