Inductive Sensor Operation Inductive sensors can be mounted in many different ways. Depending on the type, some of these sensors can be mounted by just bolting them in place or drilling and tapping a hole that is the same size and thread as the sensor. Take a look at the video to learn how an inductive sensor works, and type down the correct answer in the comments below: A metal bolt is within the normal range of 3-wire normally-closed inductive sensor. a) the indicator light would be turned ON