1. Find an open space to avoid touching other objects in the process of throwing the thermometer.
2. Hold the end of the thermometer far away from the mercury bubble, and let the mercury bubble face up.
3. Throw down the thermometer with strong acceleration, and suddenly stop moving after reaching the lowest point. Mercury will continue to move downward under the action of inertia and flow back into the mercury bubble. Please be careful not to let the thermometer touch other objects during this operation, and don't slip out.
4. Repeat for many times until the temperature displayed by the thermometer is lower than 35℃, and then the measurement can be made.
Prohibition of use
Considering the mercury hazards of mercury thermometers, many countries have taken measures to prohibit them. As early as 1992, Sweden banned the sale of all medical equipment containing mercury. Britain, France, Denmark and the Netherlands have also banned the use and sale. In the United States, since 2, 13 states and cities such as San Francisco, Boston and Michigan have banned the sale of mercury thermometers.
The European Commission has also banned the sale of mercury thermometers since 25 and its export since 211. In December 28, the Argentine government also announced that it would ban the production and import of mercury thermometers. The World Health Organization has also established a global mercury elimination plan, with the goal of reducing the global demand for mercury-containing thermometers and sphygmomanometers by 7% in 217.
However, the use of mercury thermometers is not prohibited in China. Mercury thermometers are widely used in the medical field and ordinary families, and some pharmacies can buy mercury thermometers. According to the data from China Medical Device Industry Association, in 28, the national production of mercury thermometers consumed 19.25 tons of mercury, equivalent to the consumption of 21.85 billion standard mercury-containing energy-saving lamps.
according to statistics, about 12 million mercury-containing thermometers are produced in China every year, and more than 1 tons of mercury are treated as waste every year because of the breakage of mercury thermometers in China.
On August 16th, 217, the Minamata Convention on Mercury came into force for China, which clearly stated that "from January 1st, 226, the production of mercury-containing thermometers and mercury-containing sphygmomanometers is prohibited."
refer to Baidu encyclopedia-mercury thermometer for the above contents.