Two PIR sensors combined with a microwave detector. Complete with anti-masking technology, pet immunity to 25kg and designed for outdoor use.
Anonymous Customer (02.04.2019.)Could not fault Alert Electrical. Hassle-free purchase and item delivered quickly and well packed. Have had the unit on test (no bells if triggered) for month now, covering the back garden and not one false alarm. Currently set for high sensitivity with no masks fitted - so I have 2 levels of reduced sensitivity available to me. Detection range is ~12 meters in the middle, and ~8 meters at the edges. Would definitely recommend this for covering a yard or enclosed garden. Only one negative thing: I would have preferred it in black or even brown - basically any colour other than cheap-looking white.