The Cleveland Controls NS2-1726-00 Pressure Switch is a pressure-sensing control designed for compatible HVAC and combustion equipment. It monitors pressure changes within the system and opens or closes an electrical circuit when the pressure reaches a specified setpoint, helping control equipment operation and safety functions. Commonly used in furnaces, boilers, air handlers, and ot... https://www.partshnc.com/ns2-1726-00-cleveland-controls-pressure-switch