Description: When the visitor places their hand into the 35 degree sealed windchill box, a fan blows air onto one side of their hand. Infrared temperature sensors measure the temperature on both sides of the visitors hand and the readout is displayed on the screen. Usually a visitor will have a 10 degree difference between the front and back of their hand.

Technology: Small PC, small freezer, A/D converter, infrared temperature sensors, fan, relays, and industrial PLC unit programmed with ladder logic.

Windchill Machine