The maximum allowable environmental wind speed for this anemometer is 75KM/H. Any environment exceeding this wind speed may exceed the range and damage the meter head. This sensor is spontaneous and does not require power supply. When there is wind rotating, it generates a voltage signal and is displayed by the meter head. This wind speed sensor is a simple structure with average accuracy and is only suitable for environmental wind speed reference, not suitable for meteorological forecast level applications. The wind speed sensor should be installed in a horizontal position to ensure that the installation position is not prone to water accumulation and is easy to detect environmental wind speed. The wind speed sensor has a rainproof function, but it is not resistant to soaking in rainwater. The signal output line is about 3 meters long, and when it needs to be extended, it can be connected according to the corresponding color.