QPM11 Air Pressure Switch 1/4" NC/NO Pneumatic Compressor Control

QPM11 NC/NO Air Pressure Switch – Adjustable Pneumatic Compressor Control

Take precise control of your pneumatic and hydraulic systems with the QPM11 Air Pressure Switch. Built from durable metal with an IP54-rated enclosure, this 1/4-inch diaphragm pressure switch is engineered for dependable automated pressure monitoring across industrial and commercial applications. Available in both Normally Closed (NC) and Normally Open (NO) configurations, it adapts seamlessly to CNC machines, automated production lines, compressors, and air supply systems.

Made in Mainland China.

Key Features

• Adjustable Pressure Settings: Simply rotate the hexagonal screw to dial in precise pressure thresholds — no special tools required for quick, accurate calibration.
• NC & NO Configurations: Choose between Normally Open or Normally Closed operation to match your existing system architecture and wiring setup.
• IP54 Protection Rating: Dust-resistant and splash-proof housing ensures consistent, long-lasting performance in demanding workshop and industrial environments.
• Wide Voltage Compatibility: Supports AC 110V, AC 220V, DC 12V, and DC 24V — suitable for a broad range of equipment and control panels.
• User-Friendly Design: Clear labeling and an intuitive adjustment mechanism minimize installation time and simplify integration into existing pneumatic control circuits.
• Versatile Industrial Use: Ideal for CNC machines, automated production lines, air compressors, hydraulic systems, and general air supply control.

Technical Specifications

Package Contents

• 1 × QPM11 Air Pressure Switch

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For general guidance on pneumatic system safety and best practices, refer to OSHA's Pneumatic Tools Safety Guidelines.

Notes

• Actual color may vary slightly from product images due to monitor calibration and lighting conditions.
• Please allow a slight manual measurement deviation for listed dimensions.

Learn more: Pressure switch

Frequently Asked Questions

Q: What is the difference between the QPM11-NC and QPM11-NO air pressure switch configurations?

A: The QPM11-NC (Normally Closed) configuration keeps the circuit closed under normal conditions and opens when the set pressure threshold is reached. The QPM11-NO (Normally Open) configuration keeps the circuit open and closes when the pressure reaches the set point. The correct choice depends on your system's wiring logic and safety requirements.

Q: What pressure range does the QPM11 pneumatic pressure switch support?

A: The QPM11 supports two pressure ranges: 0.1–1 MPa for higher-pressure compressor and industrial applications, and 0.01–0.1 MPa for lower-pressure systems. Both ranges are adjustable via the hexagonal screw for precise threshold customization.

Q: Is this air pressure switch compatible with both AC and DC systems?

A: Yes. The QPM11 pressure switch is compatible with AC 110V, AC 220V, DC 12V, and DC 24V operating voltages, making it highly versatile for use in a wide range of pneumatic compressors, CNC machines, automated production lines, and other industrial control systems.

Q: How do I install the QPM11 pneumatic compressor pressure switch?

A: The QPM11 uses an external thread (PT1/4) for installation. Simply thread it into the appropriate port on your compressor or pneumatic system, connect the wiring to your control circuit, and adjust the pressure set point using the hexagonal screw. Clear labeling on the switch simplifies the setup process.