QPM11-NC: This is a normally closed pressure switch. The switch contacts are closed when pressure is not set and open when the set value is reached. Model: QPM11-NC Medium: Not specified Color: Black Material: Plastic + Stainless Steel Pressure Range: 0.1 - 1.0 MPa Operating Temperature: -5C to 60C Operation Type: Adjustable pressure switch Connection Type: External thread Port Size: 1/8 inch Working Voltage: 220V AC, 48V AC/DC Maximum Current: 500mA Maximum Power: 24VA, 100VA Insulation Voltage: 500V, 1500V Maximum Pulse Rate: 200 cycles per minute Service Life: 100 million cycles Note: To adjust the pressure setting, use a hex tool to turn the adjustment screw located between the two terminals. Package Includes: 10 x Pressure Switch Note: Lighting effects and monitor settings may cause slight color variations between the product image and actual item. Measurement tolerance: 1-3 cm.