Continuous measuring apparatu of multi -arm hole diameter top

The utility model discloses a continuous measuring apparatu of multi -arm hole diameter top, including shell and inside circuit board, the shell is provided with thermal insulation material filling layer and vacuum layer, and the circuit board still is provided with temperature sensor. Through set up thermal insulation material filling layer and vacuum layer in the shell of logging instrument to the ambient temperature who ensures system's work does not rise along with ambient temperature's rising, and is two -layer thermal -insulated through two -layer thermal insulation material filling layer and vacuum layer, makes thermal -insulated effect better, in order to guarantee the long -time normal work of instrument, to cross that it carries out real -time supervision to its inside temperature to set up temperature sensor, guarantees work ambient temperature, guarantees that data are accurate, the problem of because the temperature in the stratum is to the influence to the instrument, forthe normal continuous wo