Generic LJ30A3-15-Z/AX Inductive Proximity Sensor, NPN NC, 15mm Range, 6-36VDC, IP65, Brass-Nickel Plated

The sensor uses a standard 3-wire DC configuration: connect the brown wire to the positive DC supply voltage (6-36VDC), the blue wire to the DC ground (0V), and the black wire is the NPN output signal. In its Normally Closed (NC) state, the black wire is internally connected to the blue wire (ground) when no target is present, and it opens (goes high impedance) when a metal target is detected within range.

Yes, inductive proximity sensors can detect all conductive metals, but the effective sensing distance (Sr) is reduced for non-ferrous metals compared to ferrous steel. For the LJ30A3-15-Z/AX, the 15mm nominal distance is typically for mild steel. For aluminum or copper, you should derate the sensing distance, often to approximately 30-50% of the rated value, and perform empirical testing for your specific application.

A non-shielded (or unshielded) design means the sensor's sensing field is not contained solely at the front face; it also extends slightly from the sides of the housing. This allows for flush mounting in metal without causing a false trigger, but it also means metallic objects approaching from the side within close proximity can be detected. This provides mounting flexibility but requires consideration of the surrounding environment to avoid unintended actuation.

Yes, with its IP65 rating, the sensor is protected against dust ingress and low-pressure water jets from any direction. It is well-suited for typical industrial environments such as machine shops, assembly lines, and conveyor systems where dust, oil mist, or occasional water spray may be present. It is not submersible and should not be used in high-pressure washdown or submerged applications.