A.J. Antunes 8021204002 Pressure Switch

The A.J. Antunes 8021204002 Pressure Switch (Model SMD) is a field-proven SPDT air differential pressure switch engineered for precision monitoring in commercial HVAC systems and industrial air handling units. This switch operates across a 0.17" to 6" W.C. pressure range, allowing technicians to accurately calibrate set points for proof-of-flow, filter monitoring, or fan status verification. Designed with 1/4" compression fitting connections, it ensures a secure, leak-free mechanical interface with standard pneumatic lines. The inclusion of a protective cover enhances terminal safety and internal component longevity in demanding mechanical room environments. Whether you are replacing a failed differential air pressure sensor or installing a new safety interlock, the 8021204002 provides the electrical switching reliability required to maintain system uptime and prevent equipment damage due to airflow loss.

• Versatile Range: Adjustable 0.17" to 6" W.C. set point handles a broad spectrum of static pressure and differential applications.
• Industrial Build: Features a rugged SMD model design with a protective cover to shield electrical contacts from dust and debris.
• Standardized Plumbing: Integrated 1/4" compression fittings simplify field installation without needing additional adapters.
• Reliable Switching: Single Pole Double Throw (SPDT) configuration allows for flexible wiring as normally open or normally closed.

Is the 8021204002 suitable for sensing vacuum or positive pressure?
Yes, as a differential pressure switch, it can be plumbed to sense positive pressure, vacuum (negative pressure), or the difference between two points in the airstream.

What electrical load can this Antunes switch handle?
This SPDT pressure switch is typically rated for pilot duty or small motor loads; always verify your specific amperage pull against the terminal ratings before wiring.

Does it come with mounting hardware?
This model typically includes the switch and 1/4" compression nuts; ensure your mounting surface is compatible with standard SMD bracket footprints.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.