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Sensor Urinals

A passive infrared sensor identifies when the urinal has been used, by detecting when someone has stood in front of it and moved away, and then activates the flush. There usually a small override button, to allow optional manual flushing. To prevent false-triggering of the automatic flush, most infrared detectors require that a presence be detected for at least five seconds, This prevents a whole line of automatic flush units from triggering in succession if someone just walks past them.

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