Generic LJ18A3-8-J/EZ Inductive Proximity Sensor NO, DC 6–36V, 6.4mm Detection, Brass-Nickel Plated, IP65

This sensor is specifically designed to detect ferrous metals, primarily iron and steel. The sensing principle relies on the target material's ability to absorb energy from the sensor's oscillating magnetic field, which is most effective with magnetic metals. It will not reliably detect non-ferrous metals like aluminum, copper, or brass.

Connect the brown wire to your positive DC supply voltage (6-36V), the blue wire to ground (0V), and the black wire to your PLC's digital input or load. In the NO configuration, the black output wire switches to ground (sinks current) when a metal target is within the 6.4mm detection range. Ensure your input circuit is compatible with this sinking NPN-style output.

Yes, the LJ18A3-8-J/EZ is a shielded (flush-mountable) type. This design allows it to be installed embedded in or flush with a metal mounting bracket without affecting its sensing field or detection distance, unlike unshielded sensors which require a clearance zone around the sensing face.

The IP65 rating certifies that the sensor is dust-tight (6) and protected against low-pressure water jets from any direction (5). This makes it suitable for industrial environments with airborne particulates, occasional splashing, or wash-down procedures, though it is not submersible.