![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 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](https://dwyer-inst.com/media/catalog/product/a/a/aafs__new_600x600.gif)
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
![Amazon.com: TPI RH3A Series RH Adjustable Air Flow/Differential Pressure Switch Control, 0.05" - 12" WC, Compression Connection : Industrial & Scientific Amazon.com: TPI RH3A Series RH Adjustable Air Flow/Differential Pressure Switch Control, 0.05" - 12" WC, Compression Connection : Industrial & Scientific](https://m.media-amazon.com/images/I/71sI5VNHTFL.jpg)
Amazon.com: TPI RH3A Series RH Adjustable Air Flow/Differential Pressure Switch Control, 0.05" - 12" WC, Compression Connection : Industrial & Scientific
![Series AVFS | Air Flow Switch is designed to monitor air flow in ducts. Includes a mounting bracket for quick duct mounting. Applications include fan monitoring, filter monitoring, and air handlers. Series AVFS | Air Flow Switch is designed to monitor air flow in ducts. Includes a mounting bracket for quick duct mounting. Applications include fan monitoring, filter monitoring, and air handlers.](https://www.dwyer-inst.co.uk/images/addtl/AVFS_600x600.gif)