How better avoid False Alarms

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You should place the sensor where it will not receive inordinate amounts of heat or cold. Therefore, the sensor should not face open windows as sunlight will affect its operation or in an area where wind or air conditioning will blow on it. If part of your coverage area includes spots where it will detect temperature change, you may be able to utilize special tape provided by many companies to address that issue. Heated pipes represent another potential source of false alarms. You should follow your manufacturer's instructions to mask areas prone to false alarms.

Experts recommend several other ways to avoid false alarms. First, your choice of locating the sensor should depend on its detection range. A sensor which has a range that greatly exceeds the distance that it is tasked to monitor may cause false alarms. You should also seal all openings to prevent infiltration by insects; this also insulates the unit from drafts. Hanging objects, such as balloons, have also been known to cause false alarms if they move with shifts in air circulation.

Some models use white-light filters which automatically exclude direct sources of light. Others use pulse-count circuits to prevent the unit from processing alarm systems unless the unit detects a heat source crosses multiple detection zones