Outer wall of heating plate Outer wall of heating tube and heating rod Inner wall of heating pipe HTHP tank fluid Inner wall of arc runner Outer wall of heating tube and heating rod The optical fiber sensor is embedded in the fine groove of the outer wall of the heating tube / rod Arranged along the heating tube / rod axis It can measure the temperature on the outer wall in real time Outer wall of heating tube and heating rod The optical fiber sensor is embedded in the fine groove of the outer wall of the heating tube / rod Arranged along the heating tube / rod axis It can measure the temperature on the outer wall in real time