Yellow enameled rod. Filled with blue coloured organic liquid (without mercury, ecologically safe). Indelible printing scale resistant to chemical products. Triangular ring to prevent the thermometer from rolling. Partial immersion at 76 mm. The batch number is not printed on the thermometer. Connected to the 3 following calibretion channels: MRA/ILAC (COFRAC, DKD…), NIST and GOST