Antunes Differential Pressure Switch WC

The Antunes Differential Pressure Switch line (also called an air differential pressure switch or airflow proving switch) is built to monitor low air pressure differentials in furnaces, boilers, HVAC air handling equipment and commercial equipment. Ranges are measured in inches of water column ("wc). The switches sense a pressure change and open or close an electrical circuit when the set point is reached.

Key Features:

• Sensitive diaphragm design for accurate, repeatable switching at low differential pressures
• Adjustable low-range sensing, measured in inches of water column
• Electrical configurations in the line include SPDT and SPST versions for flexible control circuit integration
• Pneumatic connection options in the line include compression fittings and NPT ports for secure, leak-resistant installation
• Many models carry FM (Factory Mutual) approval for installations that require third-party safety certification
• Industrial-grade construction for long-term reliability

Typical Applications:

• Airflow proving in furnaces, air handlers and ventilation systems
• Combustion air proving for burner and boiler controls
• Filter monitoring and fan or blower status verification
• Commercial food service equipment

A.J. Antunes is a long-established maker of HVAC and commercial equipment controls. Its pressure switches are known for reliability, repeatability and accuracy. Select the child item that matches the pressure range, switch type and connection style you need.