How do you remove an ADT wireless sensor from the wall?

[fredsdead]

Hi

How can you remove a ADT wirless sensor from the wall?

Im having a garage conversion next week and need to remove the sensor in the garage during this time. I've had ADT disable it for now so the tamper sensor shouldnt be an issue.

I've also managed to get the outer casing off to reveal the battery/circuit area but cannot see how it is secured to the wall.

Im guessing its screwed in but I cannot see the screw to untighten it.

Any help would be great thanks

 

[yaleguy2]

The screws are hidden behind the circuit board in the pir which has to be removed first.
It may either be just pressed in place and held by lugs you must gently prize back or there may be a plastic slot and cam to turm to release it depending on the model.