If the output is a positive voltage, the sensor is a PNP, and a negative voltage is an NPN sensor. If the black line has no output, the proximity switch is damaged
Is a proximity sensor a position sensor?
A proximity sensor is a type of non-contacting position sensor. They are used to detect the presence or absence of objects. They are perfect for use with sensitive and delicate objects and materials as they are completely non-contacting so will not damage any devices.
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