Cleveland Controls DFS-221-153 Air Flow Switch, SPDT, .05″ w.c.

Description

The Cleveland Controls DFS-221-153 is a reliable SPDT air flow switch engineered for precise airflow detection in HVAC, combustion, and ventilation systems. Fixed to operate on a pressure rise, this switch is ideal for proving air movement in furnaces, air handlers, and burner applications where accurate, repeatable switching is critical.

Key Features

• SPDT (Single-Pole, Double-Throw) switching action for versatile control circuit integration
• Fixed setpoint: operates on pressure rise at .05″ ±.02″ w.c. for consistent, reliable airflow proving
• Wide voltage compatibility: rated 120–277Vac for use across a broad range of commercial and residential HVAC systems
• 1/4″ barbed connections for easy, secure tubing attachment
• Maximum pressure rating of 1/2 PSI to protect switch integrity under varying system conditions
• Compatible with air or combustion by-products that will not degrade silicone — suitable for use in combustion air proving and flue gas environments

Specifications

• Model: DFS-221-153
• Switch Type: SPDT
• Operating Setpoint: .05″ ±.02″ w.c. (pressure rise)
• Voltage Rating: 120–277Vac
• Connection Type: 1/4″ Barbed
• Maximum Pressure: 1/2 PSI
• Media Compatibility: Air or combustion by-products that will not degrade silicone

Typical Applications

• Furnace and air handler airflow proving
• Combustion air verification in burner systems
• Ventilation and exhaust fan status monitoring
• Safety interlock circuits requiring airflow confirmation