Cleveland NS2-0547-00 Inlet Switch

The Cleveland NS2-0547-00 Inlet Switch is a high-precision safety component engineered for critical detection of blocked inlet air flow in industrial and commercial HVAC systems. Built by Cleveland Controls with a glass-filled polycarbonate housing and a resilient silicone diaphragm, this air pressure sensing switch ensures maximum stability and resistance to contaminants. As a veteran-grade HVAC pressure switch, it provides reliable protection for air handlers, rooftop units, and unit heaters by sensing positive, negative, or differential pressure. This 100% genuine NS2 series blocked inlet switch features a narrow switching differential and low set point tolerance, allowing it to deactivate equipment immediately upon sensing an obstruction. Integrating this HVAC safety switch into your control logic reduces unnecessary strain on blowers and motors, optimized for long-term performance in demanding environments. Designed for vertical mounting, it typically utilizes 1/4-inch male quick-connect terminals for seamless electrical integration with 24V to 277V AC circuits.

• Precise Blockage Detection: Advanced sensing technology promptly identifies restricted airflow to prevent system overheating and equipment failure.
• Durable Construction: Features a robust polycarbonate body and silicone diaphragm rated for temperatures ranging from -40°F to 180°F.
• Versatile Application: Compatible with a wide range of industrial equipment, including unit heaters and rooftop HVAC units.
• Enhanced Efficiency: Minimizes paradoxical energy wastage by ensuring the system only operates under optimal airflow conditions.
• OEM Compatibility: Precision-calibrated factory set points allow for direct replacement in high-volume OEM configurations.

What is the primary function of the NS2-0547-00?
It serves as a safety interlock that monitors the air inlet for obstructions. If a blockage is detected, the switch opens or closes the circuit to shut down the system and prevent damage.

Can this switch be used for differential pressure sensing?
Yes, the Series NS2 design allows it to sense positive, negative, or differential air pressure depending on how the sample lines are connected to the color-coded P1 (positive) and P2 (negative) ports.

Which orientation is best for installation?
For peak accuracy and to meet factory specifications, it should be mounted with the diaphragm in the vertical plane. Avoid mounting with sample line connections pointing upward to prevent moisture accumulation.

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.