The XS608B1PBL2: This little M8 inductive proximity sensor from the XS6 series is the kind of sensor you bury in a machine frame and forget about – until it stops working. It's shielded, so the sensing field stays right out front, giving you a repeatable 3 mm detection zone on ferrous targets. The PNP output is normally closed, so it breaks the signal when metal comes in range, which is the fail-safe way to wire into a PLC input. The body is machined from 303 stainless steel with a nickel plate finish, and it carries an IP67 seal. That means hose-down, washdown, and the kind of coolant mist you see on a transfer line won't get inside. Rated for 12 to 48 VDC and switches up to 200 mA, which covers just about any PLC digital input card out here in the grease. On top of that, it's got built-in overload, reverse polarity, and short circuit protection. So if a junior wireman crosses the leads or the load pulls too hard, the sensor doesn't cook itself. That's a real timesaver when the line is down and you're swapping it out on the fly.
Mounting is straightforward: it's an M8 threaded barrel with a 2-meter prewired cable. The nickel-plated barrel gives you a stainless-to-stainless connection when threading into a standard M8 hole. Use a jam nut (not included) to lock it in place. Cable is three conductor – brown (Vcc), blue (GND), black (output). No connector to worry about, just bare wire termination. Because it's shielded, you don't need the same standoff from metal as an unshielded sensor – the sensing field is contained to the face. But keep other ferrous hardware at least 3 mm away from the face to avoid false triggers. The 3 mm sensing distance is measured with a 1 mm thick mild steel target; actual range varies with target material.