A full-body scanner is a device that detects objects on a person's body for security screening purposes, without physically removing clothes or making physical contact. Full-body scanners started supplementing metal detectors at airports and train stations and many restricted places.
The Infrared beam sensor adopts the active infrared technology. It consists of transmitter and receiver. Transmitter and receiver installed opposite each other. When the infrared beams are interrupted, the detector will set on/off the alarm.