The Fluke Calibration temperature calibration product line (formerly called Hart Scientific) is the world leader when it comes to temperature measurement and calibration. Most of the National Metrological Institutes (NMIs) in the world use Fluke Calibration equipment. The breadth of their product line is amazing: everything from handheld dry-well calibrators to fixed point cells that define the ITS-90 temperature scale we use today. Hall Associates offers startup and training services on temperature calibration fundamentals and automation.