Compact Fan And Filter Fan Air Flow Monitor Free Lc 013 Temperature Switch - Switches - AliExpress
SWITCH*AIR FLOW M/NG/H S20
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
Air Flow Switch for Ducts - LPS Series - FLOWS.COM
AFM Fan & Filter Fan Air Flow Monitors - Orion | Mouser
Air Flow Paddle Switch FAPS | Ventilation Control Products Sweden AB