Compact air flow meter for weather monitoring. Basic wind vane meter with 4 … 20 mA output. Wind sensor with 4 … 20 mA output. Measurement of the horizontal wind direction with an analogue output signal. The vanes of the wind sensor are manufactured from synthetic material and the housing is made of anodized aluminium. For mounting purposes, the device is supplied with a threaded spigot (Page 21) with two fixing nuts.