What is the impact of blocking the field of view of a PIR on a motion sensor?

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Blocking the field of view of a Passive Infrared (PIR) motion sensor can have a direct impact on its effectiveness. PIR sensors work by detecting changes in infrared radiation, typically emitted by warm-bodied objects such as humans and animals. When the field of view is blocked, the sensor's ability to detect movements is compromised, leading to a significant decrease in its effectiveness.

When the field of view is obstructed, the sensor cannot recognize changes in heat signatures effectively, reducing its operational capability. In environments where security is essential, such as in intrusion detection systems, ensuring that the PIR sensor has an unobstructed view is critical for reliable performance. Therefore, considering this function, the best conclusion is that blocking the field of view significantly decreases the effectiveness of a PIR motion sensor.

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