AFS Series
Air Pressure Sensing Switches

AFS-460
The Model AFS-460 is a general purpose proving switch with a manual reset feature that requires operator intervention whenever it actuates. It can be used to sense positive, negative, or differential air pressure in HVAC and Energy Management applications that require operator interface.

The plated housing contains a diaphragm, a calibration spring and a snap-acting SPST– NC switch with a manual reset button.

The sample line connections located on each side of the diaphragm accept 1⁄4″ OD rigid or semi-rigid tubing via the integral compression ferrule and nut.

An enclosure cover protects the operator from accidental contact with the live switch terminal screws and the set point adjusting screw. The enclosure cover has a 7⁄8″ opening provided to accept a 1⁄2″ conduit connection.

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AFS-460

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