Temperature measuring rod for detecting surface temperature of hole wall of digestion instrument

The utility model discloses a temperature measuring rod for detecting the surface temperature of the hole wall of a digestion instrument, which comprises a metal shell with an opening at the upper end, the external configuration of the metal shell is coupled with a test tube hole of the digestion instrument, liquid or gaseous fillers are filled in the metal shell, and a sealing cover is arranged at the upper end of the metal shell and is used for sealing the fillers in the metal shell. A temperature sensor extending into the metal shell is installed at the inner end of the sealing cover, and a displayer is arranged at the outer end of the sealing cover and used for displaying the filler temperature collected by the temperature sensor. The beneficial effects of the utility model are that: because the metal shell has better thermal conductivity, the surface temperature in the test tube hole of the digestion instrument can be conducted to the filler through the metal shell in time, and because the filler is liqu