Wind sentry (speed and direction sensors), corrosion-resistant ; overall height 32cm, crossarm length 28cm, mounted on a 34mm diameter pipe. 3-Cup anemometer, 12cm diameter, AC output with 1 pulse per revolution (0-5V and 4-20mA output options). 22cm long turning radius vane with a 16cm turning radius, 1% linearity potentiometer with a life expectancy of 50 million revolutions. Operates at temperatures within the -50 to 50°C range.