Generic LJ8A3-2-Z/BX NPN NO Inductive Proximity Sensor, 2mm Detection, DC 6-36V, IP65, Brass-Nickel Plated

This sensor has an NPN Normally Open (NO) output. The brown wire connects to the positive DC supply (6-36V), the blue wire to the negative/common, and the black wire is the switched output. When a metal target is detected, the black wire switches to connect to the common (blue wire), sinking current to ground, which is the standard input method for many PLCs and controllers.

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 2mm Sn rated sensor, the actual detection distance for aluminum will be approximately 60-70% of the rated value, or around 1.2-1.4mm. For precise application, testing with the actual target material is recommended.

The IP65 rating indicates the sensor is dust-tight (first digit '6') and protected against low-pressure water jets from any direction (second digit '5'). This allows it to be used in industrial environments with dust, chips, and occasional washdowns. However, it is not submersible or suitable for high-pressure, direct water immersion.

The nominal Detection Distance (Sn) of 2mm is the standardized value for a standard target (steel). The Setting Distance (Sr), listed as 0-1.6mm, is the recommended operational range for reliable switching, accounting for manufacturing tolerances and system voltage variations. For stable operation, the target should be set within this 1.6mm range.