White Rodgers 770-1 Dual Purpose Air Switch is a versatile control device with a SPDT switch that can be actuated by positive, negative, or differential pressure. Its adjustable operating range and field-adjustable set point make it suitable for various applications, including:

• Process drying: Stopping conveyors or processes and providing alarm signals on fan failure.
• Electronic air cleaners: Permitting power to the cleaner when the blower system operates.
• Refrigeration equipment: Signaling alarm conditions or initiating/terminating defrost cycles based on pressure drop across refrigeration coils.