A.J. Antunes 8021204174 Differential Air Pressure Switch 1/8″

The A.J. Antunes 8021204174 is a factory original air differential pressure switch used for low pressure air monitoring and control in HVAC, mechanical, and industrial systems. It is designed to sense subtle pressure differences and actuate a control circuit using reliable snap action contacts when the differential crosses the preset range. This model features a compact design with a 0.17 – 6.0 inches water column (W.C.) sensing range, making it suitable for airflow detection, safety interlocks, and system control tasks in ventilation and pressurized equipment.

Key Features

• Pressure range: 0.17 – 6.0″ W.C. for low differential detection
• Switch type: SPDT (single pole, double throw) for dependable control signal response
• Connection: 1/8″ female NPT pressure port for easy tubing or pneumatic line attachment
• Includes protective cover on many listings for added durability and installation flexibility