How to exchange a photoelectric sensor on any machine

Required tools:
2,5 mm allen key & needle-nose pliers

Step 1:
Unplug the machine from its power supply!
Loosen the nut of the plug attached to the sensor and unplug it.

Step 2:
Loosen the two allen screws that hold the sensor in place.

Step 3:
The sensor is now free to be removed and replaced.

Step 4:
The new sensor is assembled in the reverse order.
First, tighten the two allen screws.

Step 5:
Plug in and tighten the sensor cable.