Description
The A.J. Antunes 8021204007 is a factory original air differential pressure switch from Antunes’ SMD series, designed for reliable monitoring and control of low differential air pressure in HVAC and mechanical systems. It detects changes in air pressure between two points — commonly across filters, blowers, or duct sections — and actuates a control circuit when the pressure differential moves outside the preset range.
Key Features
- Pressure sensing range: 0.17″ – 6″ W.C. (water column) — covers many low pressure airflow applications.
- SPDT (Single Pole Double Throw) electrical contacts for dependable switching action.
- 1/8″ female NPT connection for easy integration with tubing or pneumatic lines.
- Durable design suitable for HVAC systems, air handlers, blower controls, safety interlocks, and other environments where airflow or pressure difference needs to be monitored and controlled.
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