Features 1、High Performance: Professional wind direction sensor, better linearity, high accuracy, no dead spot, strong resistance to thunderstrike, easy to observe, stable and reliable. 2、Accuracy And Reliable Design: 360° wind direction sensor adopts accuracy angle sensor inside, accurate measurement. Easy to install, designed with a fixed south line, easy to use. 3、Premium Materials: This anemometer instrument uses low inertia ABS wind vane to respond to the wind direction, better dynamic characteristics, not easy to damage, bring you a better using experience. 4、Working Principle: Wind direction anemometer is mainly used to measure the wind direction, its working principle is usually based on the rotating type, which can accurately measure the wind direction. 5、Applicable Fields: This instrument is commonly used in meteorology, environmental monitoring, aerospace and other fields to understand the wind situation and make corresponding countermeasures. Specifications Item Type: Wind Direction Sensor Material: ABS Size: Approx. 223 x 190 x 70mm / 8.8 x 7.5 x 2.8in Gross Weight: Approx. 375g / 13.2oz Power Supply Voltage: DC9-30V Output: RS485 for Modbus Measuring Range: 0‑359° All Round Extension Line Length: 0.8m / 2.6ft Accuracy: Full Range: ±3 Degree Resolution: Full Range: 1 Degree Starting Wind Speed: ≤0.8m/s Maximum Power Consumption: 0.48W Load Capacity: DC12V Power Supply, Current Output Impedance ≤350Ω, DC24V Power Supply, Current Output Impedance ≤900Ω Voltage Output Impedance: ≥1KΩ Operating Environment: Temperature -35℃-60℃, Humidity ≤100%RH No Condensation Waterproof Level: IP64 Cable Level: Rated Voltage: 300V 80℃ Wide Application: Suitable for Wind Direction Measurement in Gardens, Greenhouses, Weather Stations, Ships, Docks, Aquaculture, Advertising Barriers, Meteorology, Marine, Environmental, Airports, Ports, Laboratories, Agriculture, And Transportation Environments Installation Aperture: 3.2mm / 0.1in Aerial Insert Diameter: 15mm / 0.6in (Recommended to Reserve 25mm for Wiring, Connect the Wires First, Then Install and Fix the Sensor) Wiring Method: Red Wire: Power Positive (Voltage, Current, Pulse), Power Positive (RS485) Black Wire: Power Negative (Voltage, Current, Pulse), A+ (RS485) Yellow Wire: Signal (Voltage, Current, Pulse), B- (RS485) Green Wire: Power Negative (RS485) Standard for ModBus RTU Communicating Protocol: First, the serial port format: Data bits 8 bits, stop bit 1 bit, parity bit none, default baud rate 9600bps, serial port software set to hex send and receive, two communicate intervals of at least 500ms or more, CRC in the manual for the parity bit, 2 bytes. Device address default address 2. Second, the communicate format: 1. Write the device address (for example, write address 02) Send 00 06 00 20 00 02 08 10 Instruction Address Write Starting address New address CRC check Return 00 06 00 20 00 02 08 10 Instruction Address Write Starting address New address CRC check Return 01 86 ** ** then the configuration is not successful. 2. Read device address (such as read address 2) Send 00 03 00 20 00 01 84 11 Instruction Address Read Starting address Read Points CRC check Return 00 03 02 00 02 04 45 Instruction Address Read Data length Device data CRC check 3. Read register data such as read address 2 data) Send 02 03 00 00 00 01 84 39 Instruction Address Read Starting address Read Points CRC check Return 02 03 02 00 26 7D 9E Instruction Address Read Data length Device data CRC check Omnidirectional wind sensor returns data as 0x0026 converted to decimal as 38 , the wind direction value is 38 degrees, no decimal places. If it is an eight direction wind direction sensor, the return data refers to the table of eight direction calculation formula on page 1. 4. Read device communicate baud rate (for example: read address 2 of the device baud rate equal to 9600) Send 02 03 00 10 00 01 85 FC Instruction Address Read Starting address Read Points CRC check Return 02 03 02 00 02 7D 85 Instruction Address Read Data length Device data CRC check Baud rate equal to data x 4800. return data 0x0002, then baud rate equal to 4800x2 = 9600. 5. Write device communicate baud rate (for example, write baud rate 9600) Send 02 06 00 10 00 02 09 FD Instruction Address Read Starting address New baud rate CRC check Return 02 06 00 10 00 02 09 FD Instruction Address Read Starting address New baud rate CRC check Baud rate equal to data x 4800. write data 0x0002, then baud rate equal to 4800x2 equal to 9600. supported baud rates are 4800, 9600, 14400, 19200, 38400, 57600, 115200. if write other unsupported baud rate, it will be automatically restored to 9600 after reboot. Returning 01 86 ** ** means the configuration is not successful. 6. Switch the communicate protocol (such as switch to for ASCII private protocol) Send 02 06 00 14 00 03 89 FC Instruction Address Write Starting address 01 for MODBUS CRC check 03 for ASCII Return 02 06 00 14 00 03 89 FC Instruction Address Write Starting address