User Manual

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HC SR501 View Area
PIR Range (Sensitivity) Adjustment
As mentioned, the adjustable range is from approximately 3 to 7 meters. The
illustration below shows this adjustment.
HC SR501 Sensitivity Adjust Time Delay Adjustment
The time delay adjustment determines how long the output of the PIR sensor module
will remain high after detection motion. The range is from about 3 seconds to five
minutes.