The Model AFS-228 is a general purpose proving switch designed for HVAC and Energy Management applications. It may be used to sense positive, negative, or differential air pressure.
GENERAL DESCIPTION & OPERATION
The plated housing contains a diaphragm, a calibration spring and a snap-acting SPDT switch. The sample connections located on each side of the diaphragm accept 1/4'' OD metallic tubing via the integral compression ferrule and nut.
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