Cleveland Controls DFS-221-347 Pressure Switch 0.05" WC

The Cleveland Controls DFS-221-347 Pressure switch that has been developed to monitor and respond to fluctuations in pressure within HVAC systems. Based on the diaphragm deflection mode of operation, this switch uses a sensitive diaphragm that changes its position in response to even minor changes in the pressure of the air. If the pressure rises above a certain level, the diaphragm moves and closes several internal contacts which initiate an electrical signal. The signal returned by the specified addresses can then be used to control numerous components of an HVAC system including fans, dampers, and alarms in realization of high performance and efficient use of power.