In order to reduce cross-infection, the non-touch automatic hand liquid soap dispenser become more and more popular. How does the hand sanitizer achieve non-touch?Just installing a IR sensor to get the function. When the hand is placed under the hand sanitizer, a sufficient amount of light emitted by the sensor transmitter will be reflected to the receiver, that is, the infrared light emitted by the infrared emitting tube is reflected by the human hand to the infrared receiving tube.
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