Model AFS-222-112 Air Pressure
Sensing Switch is a general purpose
proving switch designed for HVAC and
Energy Management applications. It
can be used to sense positive, negative,
or differential air pressure. The barbed
sample line connections located on
each side of the silicone diaphragm
accept flexible tubing. The field-adjustable range is 0.05 + 0.035/-0.005″wc to 12.0″ wc.