IR beam break sensors can be used to detect the number of people entering or exiting a building’s or room’s doorway by emitting a beam of infrared light and watching for the beam to be broken by a person passing through. Single beam break sensors allow for aggregate data on human activity in a space but dual beam break sensors will allow for directional counting.
Dual IR beam-break occupancy counter
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Cem Dogan Sahin
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http://www.osbss.com/ OSBSS
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Cem Dogan SAHIN
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http://www.osbss.com/ OSBSS
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