Long Range Proximity Sensor - 8 mm Diameter, Shielded, Normally Closed - NPNThis long range 8 mm diameter shielded proximity sensor features an extended 4mm range. This sensor has a threaded housing, and should be secured into an M8 x 1 threaded hole with thread locker. If the sensor is to be removed from the die during maintenance, epoxy it into a removable bushing or insert. This sensor is Normally Closed, which means it actuates (turns On) when metal leaves the sensing field, and turns Off when metal enters the sensing