The customized proximity switch is a position switch that can be operated without mechanical direct contact with moving parts. When the object is close to the sensing surface of the switch to the action distance, the switch can be moved without mechanical contact and any pressure, thereby driving the DC electrical appliance. Or provide control instructions to a computer (plc) device.
The main function of customized proximity switch:
1. Inspection distance
2. Size control
3. Detect the existence of objects
4. Speed and speed control
5. Counting and Control
6. Detect anomalies
7. Metering control
8. Identify objects
9. Information transmission

How to judge whether the customized proximity switch is normally open or normally closed?
1. Three-wire DC24V inductive PNP type: brown to +24V, blue to 0V. Black Connect the red test lead of the DC voltage range of the digital multimeter, and the black test lead is connected to 0V. At this time, the multimeter has 24V voltage and is normally closed, and no 24V voltage is normally open.
2. Three-wire DC24V inductive NPN type: brown to +24V, blue to 0V. Black Connect the black test lead of the DC voltage range of the digital multimeter, and the red test lead is connected to +24V. At this time, the multimeter has 24V voltage and is normally closed, and no 24V voltage is normally open.
The above is the method of judging the opening and closing of the customized proximity switch.