The passive infrared detector,or PIR,is the most commonly used component in modern security systems. They are used to:

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Detect a change in background temperature caused when an intruder passes through its detection zones

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They are generally used internally and externally

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Protect a property by detecting intruders before they gain access to a protected area

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This device is often installed in high-risk areas or areas that may be prone to environmental disturbances such as rodents

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