SPDT Fixed Point Air Pressure Sensing Switch with Barbed Connector .05 W.C. 28347

Model DFS-221-112 Air Pressure Sensing Switch is a proving switch designed for duct heater, oven, and other HVAC or Energy Management applications where an open-mounted, nonadjustable switch is desirable. It is especially suitable for surface-mounting in areas where internal access is limited. Model DFS-221-112 can be used to sense positive, negative, or differential air pressure. The plated housing contains a diaphragm and a snap-acting SPDT switch. The DFS- 221-112 is equipped with convenient dual- barbed sample line connectors located on each side of the diaphragm. The dual-barbed connectors accept 316 in. or 14 in. ID flexible tubing. The electrical connection consists of 14 in. 90o quick connect spade terminals. The SPDT snap action switch operates on pressure rise of 0.05 ± 0.02 in. w.c. For additional application and technical information, please contact the sales office.