Mercury thermometer, a kind of thermometer, is made of glass and contains mercury column that rises with body temperature. Mercury thermometers are widely used in the medical field and ordinary families, and some pharmacies can buy mercury thermometers.
Mercury thermometer is also called "medical thermometer". The working substance of thermometer is mercury, and the volume of its vacuole is much larger than that of the upper tubule. Mercury in the vacuole expands due to the influence of body temperature, which will obviously change the length of the mercury column in the tube.
The temperature of human body generally varies from 35℃ to 42℃, so the scale of thermometer is usually from 35℃ to 42℃, and the range of each degree is divided into 10, so the thermometer can be accurate to110.
After use, the thermometer should be "put back on the table", that is, the upper part of the thermometer should be forcibly dropped to make the mercury that has risen to the tube return to the vacuole; Other thermometers will not shake, which is a big difference between thermometers and other liquid thermometers.
Extended data:
If there is any damage, such as mercury thermometer or mercury sphygmomanometer, please deal with it in the following order:
1. Please keep irrelevant personnel (especially children) other than porters away from the mercury-scattering area or room, keep the mercury-scattering place in its original state, and be careful not to step on the polluted area.
2. Open all windows and use electric fans to enhance indoor and outdoor air circulation.
3. Turn off indoor heating equipment and other air conditioning systems.
4. Close the door communicating with the polluted room, isolate the polluted room from other rooms in the house, and avoid the mercury vapor from spreading to other rooms.
5. Use eye drops, syringes, bookmarks, business cards or plastic sheets to collect. Never use a vacuum cleaner, or even heat mercury in any way (because it will make mercury evaporate more easily); Do not use a broom or any towel to handle or wipe the scattered parts, so as to avoid the spread of mercury.
6. The collected mercury should be stored in a sealed and sturdy container, and the bottle cap should be sealed with adhesive tape and marked; Articles (such as clothes, carpets, etc.) ) must also be placed in a sealed container.
7. Use a flashlight to check whether there are droplets of mercury left near the scattered place. If there is still mercury, repeat steps 5-6.
8. Temporarily store the collected mercury and related pollutants in solid containers outside the house to prevent children and pets from touching them. Contact the local environmental protection bureau or the cleaning team of the township office to discharge according to their designated collection and cleaning methods.
9. Keep the polluted room ventilated and continuously isolated from other rooms (for several hours).
10. Never pour the collected mercury into the sewer to avoid polluting underground water sources. If mercury seeps into groundwater, people will drink water containing heavy metals, which will be harmful to human health.
References:
Baidu encyclopedia-mercury thermometer
References:
Baidu encyclopedia-thermometer