Antunes Controls 8021204174 Pressure Switch

The Antunes Controls 8021204174 serves as a critical differential air pressure switch designed for precision monitoring in HVACR and industrial process applications. This SPDT air pressure switch features an adjustable set point range of .17" to 6" W.C., providing technicians with the flexibility needed for various static pressure and airflow verification tasks. Engineered with 1/8" NPT female connections and an aluminum die-cast housing, the unit ensures a durable, leak-resistant connection within the sensing circuit. The integration of silver contacts guarantees reliable electrical switching even in low-voltage control loops. This diaphragm-actuated switch is commonly utilized for clogged filter detection, fan proofing, and combustion air proving. The included protective cover guards the internal set point adjustment and electrical terminals against environmental contaminants, ensuring long-term stability in mechanical rooms or rooftop units.

Key Technical Benefits

• Adjustable 0.17 to 6.0 inches water column range allows for fine-tuning to specific system requirements.
• Versatile SPDT switching logic enables both normally open and normally closed configurations for alarm or control functions.
• Rugged die-cast aluminum construction offers superior protection compared to plastic alternatives in high-heat environments.
• Standard 1/8" NPT threaded ports ensure compatibility with existing pneumatic tubing and fittings.
• High-quality silicone diaphragm maintains sensitivity and accuracy across the entire operating temperature range.

Common Technical Questions

How do you adjust the trip point on the 8021204174?
After removing the protective cover, use the internal adjustment screw to align the pointer with the desired inches water column setting on the scale. Always verify the trip point using a calibrated manometer during system operation.

Can this switch be used for both positive and vacuum pressure?
Yes, the Antunes differential switch can be plumbed to sense positive pressure, vacuum, or the differential between two points, making it ideal for air velocity monitoring and pressure drop measurements.

What is the maximum operating pressure for this model?
The standard HLGP series architecture is designed for low-pressure sensing; exceeding the maximum surge pressure rating of the diaphragm can result in calibration drift or component failure.

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.