Fluke's Hart Scientific division makes everything you need for calibrating thermometers including SPRTs, PRTs Thermistors, and thermocouples. Their temperature baths and dry-wells offer unmatched stability and their primary standards are used in metrology laboratories around the world. For precision thermometry, Hart's thermometer readouts and probes are exceptionally accurate and easy to use. Fluke's Hart Scientific laboratory has some of the lowest accredited uncertainties in the world. They also have infrared thermometer calibrators (blackbody), thermometer calibration and software.

Primary Temperature Standard Secondary Standards Thermometer Probes Ref Thermometer Readouts Calibration Baths   Industrial Thermometer Calibrators Humidity & Temperature Monitor Primary Temperature Standards SPRTs (standard platinum resistance thermometer) Triple point of water (TPW) and metal fixed-point cells Maintenance apparatus for mini fixed-point cells Bridges and resistors Software