Door security system

Door security system

T980/0430 Rights Managed

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Credit: PUBLIC HEALTH ENGLAND/SCIENCE PHOTO LIBRARY

Caption: Door security system. Person swiping a radio frequency programmed key against a sensor. This scanner is being used to open the door at left. Each key has a radio frequency transmitter that produces radio waves, telling the scanner that the person holding the key should be granted access.

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Keywords: access, caucasian, checking, door, equipment, human, id, identification, identifying, individual, key, lock, machine, opening, physical, physics, programmed, radio frequency, radio waves, radiofrequency, radiowaves, scan, scanner, scanning, security, swipe, tagged, tagging, technological, technology, transmitter, unique frequency, unlocking, white

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