Description
The A.J. Antunes 8021204014 is a genuine OEM air differential pressure switch engineered to monitor changes in low differential air pressure and actuate control circuits in HVAC, ventilation, and mechanical systems. This pressure switch senses differential pressure (typically across filters, fans, blowers, or duct sections) and provides a reliable electrical signal when the airflow changes beyond a preset threshold. It is commonly used where accurate pressure sensing is required to maintain system safety, performance, and control.
Key Features
- Pressure Range: Approx. 0.17 – 6.0 inches of water column (W.C.) — suitable for low pressure differential airflow applications.
- Switch Type: SPDT (single pole, double throw) contacts deliver dependable switching action based on differential pressure changes.
- Connection: Standard compression fitting or NPT (varies by exact SKU) for easy integration with tubing or pneumatic lines.
- Durable Construction: OEM Antunes build quality designed to withstand commercial HVAC environments.






