Infrared Cameras
The FLIR A320 Tempscreen camera is preconfigured for monitoring individuals and groups of people to find temperature deviations or elevated skin temperature, including difference temperature alarms with a dynamically updated reference temperature.
FLIR
What is Emissivity?
Emissivity is a measure of how efficiently an object radiates heat, i.e. how well the surface of an object “tells the truth” about its temperature.