Micro Swaging Stainless Steel Hollow Tube

Compared with ordinary glass mercury thermometers, thermometers have another structural characteristic, in which the temperature measuring bubble and capillary tube are connected by a section of very thin shrinkage. When measuring the temperature, mercury expansion can rise from the bubble through the contraction mouth to the upper capillary. When reading the thermometer, it is generally necessary to make the thermometer leave the human body. When mercury contracts in cold, it is disconnected at the contraction mouth, so that the mercury in the above capillary can not return, so the thermometer can also show the temperature of the human body after leaving the human body.