Rainfall Sensor Plastic RS485 Accurate Rain Barrel Sensor for Agriculture Meteorological Ship Navigation Item Type: Rainfall Sensor Material: Plastic Weight: Approx. 340g / 12oz Supply Voltage: 9-30V Output Mode: RS485 Sensor Wire Length (±5cm / 2in): 2.5m / 8.2ft Product Size: Approx. 85x78mm / 3.3x3.1in Hole Distance: 72mm / 2.8in Rainfall Port Diameter: 60mm / 2.4in Range: 0-4mm/min (more than this rain intensity, the measurement data will be inaccurate) Resolution: 0.03mm Accuracy: ±4% (indoor static test, rain strength of 2mm/min) Protecting Grade: IP65 Power Consumption: ≤0.24W (12V DC, current less than 20mA) Operating Temperature: 0-65℃ Operating Humidity: 0-99%RH (non condensing) Widely Used In: Intelligent agriculture, intelligent irrigation, ship navigation, automatic door and window, geological disasters and other industries and fields. Wiring: Red Wire: Power positive Black Wire: A+ Yellow Wire: B- Green Wire: Power negative Cleaning Method: The sensor should be inspected regularly to remove dust, mud, sand, leaves so as not to block the water flow channel, resulting in no data or inaccuracy. Cleaning can be done by first removing the 3 top wires on the side of the edge ring, then removing the 3 screws of the cone and wiping them with water and a soft cloth. Troubleshooting 1. The meter display value is incorrect when RS485 is output. It may be due to wiring problems or communicating serial port failure resulting in the inability to obtain the correct data. Please check whether the wiring is correct and firm, whether the serial port is occupied and whether the serial port is set correctly; 2. Display meter indicates that the value is obviously inconsistent with the actual situation. Please clean the sensor bucket, funnel, etc., and then test according to the experimental test method.