Description
The A.J. Antunes 8021206255 is a Single-Pole Double-Throw (SPDT) air differential pressure switch designed for precise airflow and pressure monitoring in commercial HVAC and foodservice equipment applications. With a wide sensing range of 0.17 to 12 inches of water column (“w.c.), this switch reliably detects differential pressure changes across fans, blowers, filters, and air-handling systems, triggering control actions to protect equipment and maintain safe operation. The unit ships with an integrated protective cover to shield internal components from dust, moisture, and physical damage in demanding installation environments.
Key Features
- SPDT switching action for versatile normally-open or normally-closed circuit configurations
- Wide differential pressure sensing range: 0.17 to 12 inches water column (” w.c.)
- Protective cover included for added durability in commercial environments
- Designed for air differential pressure monitoring across fans, blowers, and air-handling units
- Suitable for use in commercial HVAC systems and foodservice equipment
- OEM replacement part engineered to A.J. Antunes specifications
Applications
- Airflow proving in commercial HVAC air handlers and rooftop units
- Filter status monitoring and dirty-filter indication
- Fan/blower operation verification
- Pressure safety interlocks in foodservice and commercial cooking equipment
Product Specifications
- SKU: 8021206255
- Brand: A.J. Antunes
- Switch Type: SPDT (Single-Pole Double-Throw)
- Pressure Sensing Medium: Air (differential)
- Pressure Range: 0.17 – 12″ w.c.
- Cover: Included







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