Generic M17 Inductive Proximity Sensor 8mm NPN-NO DC6–36V - 1m Cable

This is a three-wire sensor: Brown wire connects to DC positive supply (6-36V), Blue wire connects to DC negative/common ground, and Black wire is the NPN output. In the Normally Open (NO) configuration, the Black output wire switches to ground (sinks current) when a metal target is detected within the 8mm range.

Standard inductive proximity sensors are primarily designed for ferrous metals (iron, steel). Detection of non-ferrous metals like aluminum or copper is possible but typically at a significantly reduced sensing distance, often less than 30% of the nominal 8mm rating. For reliable non-ferrous detection, a capacitive or specific aluminum-sensing model is recommended.

Yes, the M17 model features a shielded (flush-mountable) design. This allows the sensor to be installed flush with or embedded into a metal mounting surface without a significant reduction in its nominal 8mm sensing distance, unlike unshielded sensors which require a clearance zone.

The NPN open-collector output is rated for a maximum continuous current of 300mA. This is sufficient to directly drive PLC digital inputs, small relays, or indicator lamps. Ensure the connected load does not exceed this rating and includes a flyback diode if driving an inductive load like a relay coil.

Yes, the sensor incorporates reverse polarity protection, preventing damage if the power wires (Brown and Blue) are accidentally swapped. It also includes short-circuit protection on the output transistor, safeguarding the sensor if the Black output wire is inadvertently shorted to the positive supply voltage.