ViewScan uses advanced magnetic sensors with on-board digital signal processing. The sensors communicate with patented software that spatially locates threat objects. ViewScan discriminates threat objects from non-threat objects by measuring the differences in total metallic mass and ferromagnetic composition. When a threat object or multiple threat objects are discovered, a yellow dot is superimposed over a real-time snapshot image of the person walking through the portal. A graphical display of the sensor data automatically scales the signal strength of individual sensors and cross-references them to the video image.

ViewScan’s threshold or sensitivity/selectivity settings are linear as opposed to segments or ranges that screen specific targets. The portal operator has access to specific threshold setting accessible at the control console. Threshold settings can be changed without interrupting traffic flow while effectively detecting threat objects (guns, knives, box cutters, razor blades, etc.). Non-threat objects (keys, coins, jewelry, belt buckles, etc.) are permitted to pass without false alarms.