Originally intended as a intruder detector, but never used. Mains powered and once you align the two units a buzzer sounds when the beam is broken (probably by a cat ;) ) It's designed to allow you to open the box and add longer wires to produce a longer beam.
Could be used as a bit of fun with the kids, or as young kids school science demonstrator?
Infrared beam intruder detector (St Michaels Mead, CM23 4)
Collection Times
no regular exclusions but often out/away
no regular exclusions but often out/away
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