McDonnell & Miller 122800 Model AF1 – Snap Air Flow Switch
McDonnell & Miller model number AF1 is a 120 volt, single pole, double throw, snap air flow switch for medium and high velocity requirements on general purpose applications. It features a brass paddle that fits 8″ duct. The paddle can also be trimmed to fit 6″. This switch’s maximum temperature is 300°F with a velocity of 2500 fpm and includes a sensitivity screw for easy flow adjustment.