... , 0 ~ 70 M/S ( choose)Measuring precision :+/- 3%Start wind speed: < 0.7 M/SEnvironmental temperature: E:-35 ~ 85 'C (often ... with RS485 communication output or RS232 output FC-2A wind speed sensor is construction machinery (cranes, crawler cranes, door and tower crane ... , environment, greenhouse, breeding, etc to be used to measure wind speed sensor.