Pro-Range CZJ-A12M-4ANA NPN Inductive Proximity Sensor 4mm Detection - M12 Thread

This is a standard 3-wire DC sensor. Connect the brown wire to the positive DC supply voltage (typically 10-30V), the blue wire to the DC common ground (0V), and the black wire is the NPN output signal. When a metal target is detected, the black wire will sink current to ground, providing a low signal to your PLC or controller input.

No. Inductive proximity sensors only detect conductive metals, primarily ferrous metals like steel, but also non-ferrous metals like aluminum and copper. They are completely insensitive to non-conductive materials such as plastic, wood, glass, or liquids.

The nominal sensing distance is 4mm for a standard steel target (usually defined as a 1mm thick square of mild steel). For non-ferrous metals like aluminum or copper, the effective sensing distance will be reduced, typically by 30-50%, due to lower conductivity and permeability. Always refer to the sensor's datasheet for specific derating factors.

While robust, the standard version does not have a specified IP rating for liquid ingress. For use in wet, dusty, or washdown environments, it is recommended to select a model with an explicit IP67 or IP68 rating or install the sensor within a sealed protective housing.