York S1-024-27632-001 SPNO Pressure Switch Close On Fall 0.4" WC

York S1-024-27632-001 Pressure Switch used for HVAC systems. Serving as a safety and control element, this SPNO switch makes an electrical circuit when the pressure detected by the switch drops to 0.4 inches of water column. This feature is useful in HVAC equipment such as furnaces, air handlers, and rooftop units to measure airflow. like furnaces, air handlers, and rooftop units to monitor airflow. Advantages of using this switch are, it guarantees proper system functioning by keeping the correct airflow, it increases safety by avoiding equipment failure due to pressure problems, it saves energy by improving performance.