ProSight LF32 Adjustable Air Differential Pressure Switch

The ProSight LF32 Adjustable Air Differential Pressure Switchfor Filter, Fan & Duct Monitoring adjustable differential pressure switch is a compact, high-accuracy sensor designed to monitor air pressure changes in ventilation and HVAC systems. It’s ideal for detecting filter clogging, monitoring fan motor operation, or ensuring airflow integrity in ductwork and cleanrooms.

Thanks to its spring-loaded diaphragm and built-in calibrated adjustment knob, this pressure switch allows for precise field tuning without the need for additional tools like a manometer. It features a clear protective cover, IP54 protection rating, and long-term switching stability.

Whether you're controlling fire flaps, monitoring positive room pressure, or providing frost protection in heat exchangers, this switch is a reliable solution with a long life and easy installation. Available with or without a duct mounting kit.  

Key Specifications:

• Function: Adjustable air differential pressure switch

• Applications:

  • HVAC and air handling systems

  • Filter clog detection

  • Fan belt monitoring

  • Cleanroom pressure monitoring

  • Fire damper control

  • Positive pressure room systems

  • Frost protection for coils and exchangers

• Switching Output: On/Off

• Adjustment Method: Scaled visual knob (no tools required)

• Accuracy: High-precision setting and regulation

• Durability: 100,000 switching cycles

• Build: Rugged housing with steel mounting bracket

• Protection Class: IP54

• Mounting Kit: Optional (includes tubing and bracket)

• Operation Type: Pressure, vacuum, or static differential