Mcdonnell & Miller AF3-D, Air Flow Switch w/ 2 SPDT Snap Switches (Low Velocity)

For general purpose low velocity applications where the most economical flow switch is desired Paddle fits 8" (203mm) minimum duct size Two electrical knock outs allow connection from either end Brass, steel and aluminum construction Single pole, double throw snap switch Sensitivity adjusting screw makes flow adjustment easy Can be equipped with a time delay relay Minimum ambient temperature 32 Deg. F (0 Deg. C) Maximum duct temperature 275 Deg. F (135 Deg. C) Optional feature Two SPDT snap switches