The
QPM11-NO pressure switch is an adjustable, normally open (NO) pneumatic switch primarily used for controlling air pressure in industrial applications. When the detected pressure reaches the preset value, the switch closes the circuit. The NO in the model name indicates its “Normally Open” contact state, while the QPM11 refers to its model series.
Product features and specifications
According to several product listings on Amazon.com and AliExpress, the QPM11-NO has the following characteristics:
- Operating principle: Adjustable pressure type
- Medium: Clean air
- Pressure range: 0.1–1.0 MPa (approximately 14.5–145 PSI)
- Working temperature:
-5negative 5−5 to
606060 degrees Celsius
- Installation connection: Male thread, typically 1/8″ or G1/8″
- Maximum power: 100VA
- Insulation voltage: 1500V
- Maximum pulse frequency: 200 cycles/minute
- Service life: 100 million cycles
- Protection class: IP54, making it resistant to water splashes
- Materials: Often constructed from metal and high-quality plastic.
How it works
The “Normally Open” (NO) designation means that the switch’s electrical contacts are disconnected by default.
- When the pneumatic pressure is below the set point, the circuit remains open.
- Once the pressure rises and reaches the specific value you’ve adjusted, it will trigger the switch to close the circuit, allowing electricity to flow.
- The pressure can be adjusted by turning the hexagonal nut in the center of the switch.
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