Data on the composition, structure, physicochemical and metrological properties of currently used thermocouple alloys intended for measuring temperatures from ultra-low (-270 ° C) to high (3000 ° C) are summarized. Temperature dependencies are given, i.e. d. from. And the sensitivity of thermocouples, calibration tables, permissible deviations, etc. etc., data on the service life, drift of readings and accuracy of thermocouples.