York S1-024-35929-000 SPNO Pressure Switch Close On Fall 0.15" WC

The York S1-024-35929-000 SPNO Pressure Switch is an essential part of HVAC systems, its function is to detect changes in static pressure to regulate airflow. This particular model is a Single Pole Normally Open switch it is usually open at rest and will be closed when pressure is below the set point of 0.15 inches of water column. This pressure switch is essential in the system to guarantee proper functioning and avoid system failure. In an HVAC system, for instance, in an air handler or fan coil unit, the pressure switch measures the airflow over filters, dampers, or any other component.