Generic LJ30A3-15-Z/EX Inductive Proximity Sensor, 15mm Range, 2-Wire DC NO, 6–36VDC, IP65, Brass-Nickel Plated

This is a 2-wire device where the brown wire connects to the positive DC supply voltage (6–36VDC), and the blue wire connects to the load (e.g., a PLC digital input) and then to ground. The sensor acts as a switched high-side (PNP) source; when a metal target is detected, it closes the internal switch, supplying voltage from the brown wire to the blue output wire.

Yes, inductive proximity sensors can detect all conductive metals, but the effective sensing distance (Sn) is reduced for non-ferrous metals compared to steel. For this 15mm-rated sensor, the actual detection distance for aluminum is typically 30–50% of the nominal Sn value. Always verify detection in your specific application.

The 'Z/EX' suffix typically denotes specific electrical and mechanical characteristics in proximity sensor naming conventions. For this model, it indicates a 2-wire DC version (Z) with a non-shielded (unflush mountable) sensing face and extended operating temperature range, suitable for general industrial use (EX). Always refer to the manufacturer's datasheet for definitive interpretations.

This sensor has a non-shielded (unflush mountable) sensing face, meaning metal must not surround the active sensing area. Maintain a clearance of at least one Sn (15mm) from all sides of the sensing face to other metal objects. For threaded mounting, ensure the mounting nut is tightened securely but do not apply torque directly to the sensor body.