The Cleveland Controls NS2-1023-00 Air Intake Pressure Switch is an HVAC sensing component designed to monitor air pressure in heating and ventilation systems. It operates through an internal diaphragm that responds to pressure changes and activates an integrated electrical switch when the specified pressure level is reached. Commonly used in compatible furnaces and HVAC air intake as... https://www.partshnc.com/ns2-1023-00-cleveland-controls-air-intake-pressure-switch