Fluke Corporation - world leader in the manufacturing, distribution and service of electronic test tools and software, including handheld infrared thermometers for industrial applications.

Danaher Industrial Controls Group produces monitoring, sensing, motion control, gas flow meters and liquid flow meter products.

Hart Scientific - worldwide leader in temperature calibration products and services for calibrating thermometers including SPRTs, PRTs, thermistors, and thermocouples.

Educational Websites:

NIST Short Course on Temperature Measurement by Radiation Thermometry?