DoD Security Services (Call) Center Functions Transition to DMDC Contact Center. On June 1, 2013, the DoD Security Services (Call) Center (DSS Call Center) transferred various customer service functions to the Defense Manpower Data Center (DMDC) Contact Center.
Depending on the make and model, an infrared thermometer is actually reading the temperature above, below or around where you see the laser. Some infrared thermometers, like the IR Pro Series and the IR-IND are equipped with two lasers.
Like all EMR, IR carries radiant energy, and behaves both like a wave and like its quantum particle, the photon. Infrared was discovered in 1800 by astronomer Sir William Herschel, who discovered a type of invisible radiation in the spectrum lower in energy than red light, by means of its effect on a thermometer.