Wind vane relay for monitoring air flow in ducts, in supply and exhaust air devices of fans or electric heating registers. The wind vane relay is factory-set to the minimum switching points. The switch-on/switch-off values can be increased by turning the internal screw to the right. Installation takes place in vertical paddle position from above in a horizontal pipe/duct. The setting range is 2m/s . 9.2m/s and the hysteresis is approx. 1m/s.
