According to the instructions to determine the normal installation angle
The installation height is not arbitrary, it will affect the sensitivity of the detector and the effect of preventing pets. Imagine a detector mounted at a height of 2M and a height of 2.5. When the moving object moves from the ground, the frequency of cutting the bright area and the dark area is different.
Should not face glass doors and windows
Passive infrared detectors are facing glass doors and windows, there will be two problems: First, white light interference, apparently PIR has a strong suppression of white light, but after all, is not 100% inhibition. So avoid facing the glass doors and windows, you can avoid strong light interference. The second is to avoid complex environmental disturbances outside doors and windows, such as crowd movements and vehicles.
Not suitable for hot and cold vents or cold and heat sources
The induction of the passive infrared detector is closely related to the temperature change. Hot and cold vents and cold and hot sources may cause false alarms. For some low-performance detectors, air convection through windows and doors sometimes causes false alarms.
Not suitable for swinging objects
Easy-to-sweep objects will make microwave detectors work and therefore may also cause false alarms. Ancient attention was paid to the illegal invasion route. The purpose of installing the detector was sufficient to prevent criminals from intruding. Before determining the installation location, the main population of the building must be considered. In fact, we have prevented entrances and exits and intercepted illegal intrusions. This has achieved our goal.
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