Pro-Range CLJ-A12-4APA Inductive Proximity Sensor - PNP M12 Thread, 4mm Detection

The CLJ-A12-4APA is designed for standard industrial DC voltage, typically operating within a range of 10 to 30V DC. Always connect the brown wire to the positive supply, the blue wire to ground (0V), and the black wire is the PNP output signal. Exceeding the maximum voltage can damage the internal circuitry.

No, inductive proximity sensors like the CLJ-A12-4APA only detect conductive materials, primarily metals (both ferrous and non-ferrous). They are completely insensitive to non-conductive materials such as plastic, wood, glass, or liquids. For detecting non-metals, a capacitive proximity sensor would be required.

For a PLC: Connect the sensor's brown wire to +24V DC, blue wire to 0V DC (common), and the black (output) wire to the PLC's digital input. The input must be configured as a sinking type. For a microcontroller, you will typically need an external pull-down resistor on the black wire and may require a level-shifting circuit if the MCU operates at 3.3V or 5V logic.

The nominal sensing distance (4mm) is the rated value under standard test conditions with a specific target (usually a 1mm thick square of mild steel). The effective or actual sensing distance can vary slightly based on the target metal type, size, shape, and installation conditions. Always allow for a small margin in your mechanical design.