York S1-024-35780-000 SPNO Air Pressure Switch 1.0" WC

The York S1-024-35780-000 Air Pressure Switch is an essential instrument in HVAC systems with its purpose to control and or measure pressures in ducts or plenum. The SPNO switch is designed to operate at a low pressure range of 1.0” Water Column and is perfect for use in applications that require accurate pressure measurement. The switch works based on the changes in air pressure in the system and as such. Whenever the pressure is above the set 1.0 WC the switch makes contact and an electrical circuit is formed to initiate a control action. Such an action may entail the use of a fan or damper or other parts of the system to control airflow for efficiency of the system.