CMI is the NMI of the Czech Republic. CMI provides services in all basic fields of metrology, including fundamental metrology, development of national standards, research and development in metrology, transfer of units, calibration of standards and measuring instruments. The institute provides certification of reference materials, state metrology assessment of measuring instruments and other services too. Thermal Units department covers the range from (-196 to approx. 2500) °C. A prototype apparatus for AGT primary thermometry is being developed at CMI. CMI have participated in several EMRP and EMPIR projects.