At the recommended installation height of 2 meter (7ft.) to 2.7 meter (9ft.) ±10%, Digigard 75 provided full coverage from 1.5 meter (5ft.) to 121 meter (35ft.)
Avoid placing the detector in close proximity to the following source of interference, reflective surface, direct air flow from vents, fans, windows, source of steam or oil vapor, infrared light source and objects causing temperature changes such as heaters, refrigerators and ovens.
Do not place objects or furniture higher then 0.9 meter (3ft.) which a pet can climb onto (e.g. a cat on a couch) at least 2.1 meter (7ft.) away from the detector. In addition, do not aim the detector at a stairway as a pet may have access.