Wind Direction Sensor Omni Directional 360 Degree DC9?30V 4?20mA ABS Wind Measure Device Shell for Meteorology Environmental Monitoring Aerospace Item Type: Wind Direction Sensor Material: ABS Weight: Approx. 385g / 13.6oz Product Size: Approx. 223x190x70mm / 8.8x7.5x2.8in Supply Voltage: DC 9-30V Output: 4-20mA Extension Wire Length At Connection: 0.8m / 2.6ft Accuracy: Omni Directional: ?�� 3?? Resolution: Omni Directional: 1?? Starting Wind Speed: ?��0.8m/s Maximum Power Consumption: 0.48W Load Capacity: DC12V power supply, current type output impedance ?�� 350|?, DC24V power supply, current type output impedance ?�� 900|?, voltage type output impedance ?Y 1K|? Operating Environment: Temperature -35??-60?? Humidity: ?��100% RH without condensation Prevention Grade: IP64 Cable Grade: Rated Voltage: 300V 80??C Mounting Hole Diameter: 3.2mm / 0.13in Aerial Plug Diameter: 15mm / 0.59in (It is recommended to reserve 25mm / 0.98in for easy wiring, wiring first, then install the fixed sensor) Calculation Formula: 4-20mA: F=(I-4)/16x359 Attention: F: Indicates the wind direction angle value, unit: ??. I: Sensor output current value, mA Wiring Methods (Wire Sequence) Wire color Output signal (current)  Red Power positive Black Power negative Yellow Signal Troubleshooting : 1. The wind blades do not rotate properly, and the hysteresis is big. There are foreign objects or jammed in the bearing due to long term use. Please send the sensor back to the company for processing. 2. Analog signal meter display value is not correct. Possible wiring problems or communication serial port failure caused by 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 setting is correct. 3. If it is not the above reasons, please contact customer service.