Mercury is listed by the United Nations as one of the top ten chemicals that endanger human health and the environment.

     China has joined the United Nations "Minamata Convention", and my country will start a total ban on the production and export of mercury in 2020.

     As the most widely used mercury thermometer in the market, it is about to be delisted. In the face of the complex and diverse electronic thermometers, forehead thermometers, ear thermometers and the latest mercury-free glass thermometers on the market, how should families choose?

     Along with our mercury thermometers for more than 20 years, they have always been simple in function, high in accuracy, and affordable, and have been loved by users. However, with the increasing impact of mercury on people’s lives, the pollution to the environment has become more and more serious. Minamata disease in Japan, mercury pollution in Guizhou, and various mercury soil and water pollution all over the world have become banned imminent.

     Electronic clinical thermometers came into being. Electronic clinical thermometers are fast, convenient and suitable for people of all ages, and they are becoming more and more in the market. However, electronic clinical thermometers have shortcomings that cannot be ignored. Because electronic clinical thermometers are susceptible to electromagnetic interference, circuit aging and external temperature differences, the accuracy of measurement results is often not very high. Electronic clinical thermometers ignore the core function of clinical thermometers-measurement accuracy. 

     Substituting mercury materials is a key area that has been researched and explored in recent years,The emergence of mercury free thermometer can not only have the accuracy of mercury thermometers (-0.15~+0.1℃), but also solve the problem of mercury pollution hazards, retaining the core functions of the thermometer and measuring accuracy. Mercury free is the biggest advantage of good clinical thermometers, and high accuracy is the core of the product. 

       Mercury free thermometer is made of gallium instead of mercury, including a tube body and a temperature-sensitive bubble, the inside of the tube body is formed with capillary pores along the axial direction, and a cavity is formed inside the temperature-sensitive bubble; one end of the tube body is connected with the temperature-sensitive bubble, and the capillary is connected with the cavity; capillary pores. There is also a throat bubble formed on the throat bubble; a throat bubble is provided with a reserved spot, and a flow channel is formed between the inner wall of the throat bubble and the outer wall of the reserved spot raised; the flow area of the flow channel is smaller than the flow area of the capillary hole; and By setting the laryngeal bubble in the capillary and forming the retention point in the laryngeal bubble, the flow area of the temperature-sensitive liquid is reduced when passing through the laryngeal bubble and the retention point is raised, so that the temperature-sensitive liquid is not The reflux will occur due to the shrinkage of the temperature-sensitive liquid itself, which prevents the liquid surface of the temperature-sensitive liquid from falling in the pores, thereby ensuring the accuracy of the measurement reading. 

     In a word, in terms of accuracy, there is no difference between mercury free thermometer and mercury thermometer.