Description
The Cleveland Controls DFS-221-222 Air Pressure Switch detects changes within an airflow circuit and switches its electrical contacts when the preset pressure condition is reached. The SPDT configuration provides one common contact with separate switching paths, while the 0.05″ WC setting defines the pressure point at which the contacts respond. The barbed fitting connects to pressure tubing, allowing the switch to sense the monitored passage in HVAC systems. Its 120-277 VAC rating identifies the electrical range for the switching circuit. It is used in air-moving equipment to monitor pressure conditions and provide control input when airflow changes.
