What is the mercury thermometer?

Mercury thermometer is a tool used to measure temperature. Gabriel Fahrenheit invented this in 1714 and its basic model is still used in a medical and non -medical environment. Usually such a device is a glass tube filled with mercury. Most of this substance is found in a metal tip that is used as a heating device for a thermometer. Most of these thermometers hold between 0.02 ounces (0.5 g) and 0.1 ounces (3 g) mercury. Strong glass generally closes liquid metal sensitive to temperature. When the mercury thermometer is placed outside or in the body, the metal tip is heated and the mercury stretches along the length of the hollow space inside the tube. Higher temperatures cause mercury growth, while low temperatures cause a drop. These thermometers are usually marked by the temperature on the Fahrenheit or Celsius scale.

These devices are commonly used in medicine and meteorology. Doctors often use the maximum mercury thermometer to measure the human body temperature. This type can be used orally or anal. Make it possiblee to maintain the temperature readings until the mercury is forced back to the tip with a centrifugal force or by shaking the thermometer head towards the floor. Nitrogen gas in the glass tube is what holds mercury in place.

meteorologists can also use mercury thermometer to measure air temperature. The standard mercury freezes at -37.89 ° F (-38.83 ° C). In order to measure temperatures below this point, meteorologists will often mix mercury with the thali alloy. Thallium reduces the freezing point to -78 ° F (-61.1 ° C). If the mercury freezes, nitrogen may be caught by a metal that causes thermometers to work.

with only 0.02 ounces (0.5 g) and 0.1 ounces (3 g) mercury in each thermometer are considered low. However, mercury inhalation at these levels could cause dangerous side effects. Due to the dangers associated with mercury poisoning, many countries in Europe have decided to ban thermometers RTuti for medical use.

The United States did not forbid mercury thermometers in the medical environment. However, the American Academy of Pediatricians and the Environmental Protection Agency has designed an alternative temperature measurement device for personal use. Since 2009, there has been no US ban on the use of mercury thermometer in a professional medical environment.