I bought a motion detector light a few weeks ago. It worked great out of the box, but now its sensitivity has lowered a lot. You need to be really close to it for it to detect motion.
I tried cleaning dust, but it was not dirty.
Is there way to make it more sensitive? If I remove that white plastic that covers the light sensor, will the sensitivity improve?
I know it might make inside electronics dirty, but I don't care about that I can just clean sensor every week.
Best Answer
Removing the white plastic that covers the light sensor will make the PIR/motion sensor less sensitive/effective. The cover is actually a Fresnel lens, it has a pattern that scatters light in different directions, increasing sensitivity dramatically (e.g. when light passes through a part of the cover that is 0.5mm away from where it was before, it is sent into a different direction, making it appear as if it has moved more than it has).
I would suggest cleaning or replacing the cover (especially if it is old and has become damaged/dull/dirty). Some PIR sensors also have a dial to turn up or down sensitivity.
I know this is an old question, but it may help others.