I'm looking to buy some for the alarm system and need to know of a decent quality type. Have looked around but can't figure if I need the the dual tech ones or if the normal ones will suffice. I will need a couple for the kitchen and bathroom, and in a few cases the PIR location will be directly opposite large windows or close to lighting. I would like them to have an LED indicator and be of the type that indicates having been triggered should it be in a zone with others. It really is a case of me not wanting to spend unnecessarily.
Regarding these type of internal detectors, do they trigger if a fly/spider goes across the lens?....and would people or lights moving across the outside of a window set them off?
Regarding these type of internal detectors, do they trigger if a fly/spider goes across the lens?....and would people or lights moving across the outside of a window set them off?