Great product, bad review Must have been an accident or rather someone not knowing how to hook it up properly. I've been looking for a low cost IR sensor with normally open contacts for a long time, there are a million models out there with only normally open contacts, but this one has a simple jumper that allows you to change the output to normally open or normally open and has an additional set of tamper alarms. contacts, which makes it even better. I use it as a requirement for an exit sensor on the exit side of my doors for my access control system. The 12V power requirement is a perfect match for the rest of the gear, and the versatility of the pin configuration is amazing. I have already ordered more. The mounting bracket is great too, it has a removable ball head mount which allows for easy attachment and adjustment unlike most models which have to be placed against a wall or in a 45* corner.
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