Fluke's Hart Scientific Division makes everything you need for calibrating temperature sensors including SPRTs, PRTs, thermistors, and thermocouples. Their constant temperature baths and dry-block calibrators offer unmatched stability, and their primary temperature standards are used in national metrology institutes around the world.
For precision thermometry, Hart Scientific Division's thermometer readouts and probes are exceptionally accurate and easy to use, and their temperature and humidity data logger handles your environmental monitoring needs. The company also offers temperature calibration training courses. Their NVLAP-accredited laboratory (lab code 200348-0) has some of the lowest accredited uncertainties, and its quality assurance manual complies with ISO/IEC 17025 and ANSI/NCSL Z540.