Pro-Range CRJ-A18M-5APB Capacitive Proximity Sensor - PNP Output, M18 Thread, 5mm Detection

The sensor operates on a 10-30V DC supply voltage, making it compatible with standard 12V and 24V industrial control systems. Ensure correct polarity during connection, as the built-in protection guards against reverse wiring but proper installation is required for reliable operation.

While primarily designed for non-metallic materials like plastics, liquids, and powders, it can detect metallic objects. However, for optimal and reliable detection of metals, an inductive proximity sensor is generally recommended due to its higher sensitivity and immunity to material composition variations.

A sensitivity adjustment potentiometer is located on the back of the sensor. Use a small screwdriver to rotate it clockwise to increase the detection range or counter-clockwise to decrease it. Adjust while the target object is present at the desired detection point until the indicator LED reliably triggers.

The standard 3-wire configuration is: Brown wire to DC+ (10-30V), Blue wire to DC- (0V/GND), and Black wire as the PNP output signal. The PNP output switches the Black wire to the positive supply voltage (sourcing) when an object is detected. Always refer to the sensor's datasheet for the definitive pinout.

Yes, this capacitive sensor is well-suited for detecting liquid levels inside non-metallic containers. Mount the sensor on the outside of the plastic tank at the desired level. The change in dielectric constant when liquid replaces air will be detected. Fine-tune the sensitivity to account for the tank wall thickness and liquid type.