Description
The A.J. Antunes 8021204002 is a genuine Antunes OEM air differential pressure switch designed for reliable pressure monitoring and control in HVAC, industrial and mechanical systems. It senses differential air pressure and actuates a control signal when the pressure passes preset thresholds, making it suitable for applications such as airflow sensing, blower or fan monitoring, filter pressure drop detection, or safety interlocks.
Key Features
- Adjustable differential sensing range: 0.17 – 6.0 inches of water column (W.C.), covering typical low pressure air applications.
- SPDT (Single Pole Double Throw) electrical contacts for dependable switching action.
- Standard compression fitting connections (usually 1/4″) for easy tubing hookup.
- Durable OEM construction designed for commercial HVAC and industrial environments.






