Zealot mechanism transmission air flow switch for fan Destiny opening Recreation
New 5V 0.25A 4CM 4020 3-wire switch high airflow cooling fan 109P0405F6D05 - AliExpress
Model AAFS | Adjustable Air Flow Paddle Switch has a stainless steel vane, galvanized steel base, and ABS enclosure. Applications include air flow proving in HVAC systems. | Dwyer Instruments
Wind Control Switch Air Flow Sensor Central Air Conditioning Fan 12V Input Dry Contact Output Control