Pro-Range RM18 8mm NPN Inductive Proximity Sensor (Unshielded) - DC 6-36V, 6m Cable

This RM18 model is unshielded (non-flush), meaning it can detect metallic objects from its sides as well as its face. It must be mounted with a clearance from surrounding metal (as per datasheet) to prevent false triggering. Shielded sensors can be mounted flush with metal and only sense from the front.

Connect the brown wire to your DC positive supply (6-36V), the blue wire to DC negative (common ground), and the black wire is the NPN switched output. When a metal target is detected, the black wire switches to ground (sinks current). Connect the black wire to your PLC's digital input, which should be configured for a sinking (NPN) signal.

Yes, inductive sensors detect all conductive metals, but the effective sensing distance is reduced for non-ferrous metals compared to steel. For this 8mm nominal range (for steel), expect a reduced sensing distance, typically 30-60% of the rated value, for aluminum, copper, or brass targets.

While the exact frequency isn't specified in the provided data, typical inductive sensors of this type offer switching frequencies in the range of 500 Hz to 2 kHz. This allows for reliable detection of fast-moving parts on high-speed production lines.