Cleveland Controls DFS-448-112 Air Flow Switch, SPDT, 120-277Vac

Description

The Cleveland Controls DFS-448-112 is a precision-engineered air flow switch designed for reliable detection of air movement in HVAC, combustion, and ventilation systems. With a fixed SPDT switching action that activates on pressure rise, this switch provides accurate and repeatable performance in demanding commercial and industrial applications.

Key Features

• SPDT (Single-Pole, Double-Throw) switching action — fixed to operate on pressure rise
• Setpoint: .05″ ± .02″ w.c. (water column) for precise low-differential pressure detection
• Wide voltage compatibility: 120–277Vac for flexible installation across commercial systems
• 1/4″ barbed port connections for easy, secure tubing attachment
• Maximum operating pressure: 1/2 PSI — suitable for low-pressure air and combustion by-product applications
• Compatible with air and combustion by-products that will not degrade silicone internals

Application

The DFS-448-112 is ideal for proving airflow in furnaces, air handlers, exhaust fans, and combustion equipment. Its SPDT output allows integration into control circuits for safety interlock, fan proving, and system status monitoring. The low-differential pressure setpoint makes it well-suited for detecting airflow in low-resistance duct systems and burner applications.

Specifications

• Model: DFS-448-112
• Switch Type: SPDT
• Operation: Fixed — activates on pressure rise
• Pressure Setpoint: .05″ ± .02″ w.c.
• Maximum Pressure: 1/2 PSI
• Voltage Rating: 120–277Vac
• Port Connections: 1/4″ barbed
• Compatible Media: Air or combustion by-products that will not degrade silicone