What Is Inside A Thermometer

What Is Inside A Thermometer?

A thermometer is usually made up of a small hollow glass tube. At the bottom of the tube is a bulb which holds a liquid such as alcohol or mercury. When there is an increase in heat the liquid inside the bulb expands pushing up into the tube.

What is inside a thermometer now?

In a mercury thermometer a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature the mercury expands and contracts and the temperature can be read from the scale. Mercury thermometers can be used to determine body liquid and vapor temperature.

Is the stuff inside thermometers dangerous?

The small silvery ball in a mercury thermometer can be dangerous if the glass breaks and the mercury is not cleaned up properly. The mercury will evaporate and can contaminate the surrounding air and become toxic to humans and wildlife. Each thermometer contains about .

What is the red fluid in a thermometer?

Mercury is a silver-white to gray substance. If your thermometer is filled with a red liquid your thermometer contains red dyed alcohol or mineral spirits and not mercury.

What materials make up a thermometer?

Mercury is one of the most familiar materials used in liquid thermometers. Other liquids such as kerosene or ethanol may also be used in these types of thermometers.

Is there still mercury in thermometers?

The oldest thermometers used are mercury in glass. Newer thermometers include non-mercury liquids in glass and digital and electronic devices that use sensors to measure temperature. Thermometers that check body temperature in the ear across the forehead or have a digital display do not contain mercury.

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What kind of alcohol is in a thermometer?

The liquid used can be pure ethanol toluene kerosene or isoamyl acetate depending on manufacturer and working temperature range. Since these are transparent the liquid is made more visible by the addition of a red or blue dye.

What happens if you touch mercury from a thermometer?

Mercury is a very toxic or poisonous substance that people can be exposed to in several ways. If it is swallowed like from a broken thermometer it mostly passes through your body and very little is absorbed. If you touch it a small amount may pass through your skin but not usually enough to harm you.

What happens if you inhale mercury from a thermometer?

Mercury readily turns into vapour at room temperature and when inhaled gets absorbed into the bloodstream and attacks the nervous system.

What happens if you swallow mercury?

Health effects of mercury exposure

The inhalation of mercury vapour can produce harmful effects on the nervous digestive and immune systems lungs and kidneys and may be fatal. The inorganic salts of mercury are corrosive to the skin eyes and gastrointestinal tract and may induce kidney toxicity if ingested.

What is the silver stuff in a thermometer?

Identification. You can identify the liquid in a thermometer based on its color. Silver liquid indicates that the thermometer contains mercury while red liquid is alcohol to which red coloring has been added. Although uncommon in modern thermometers a clear color indicates water.

Which one is filled in the bulb of a thermometer?


Mercury is a metal which exists in liquid form at room temperature . It is a shiny liquid metal with a high coefficient of expansion. It also has a high boiling point which is suitable for measurement of higher temperatures. Therefore mercury is the metal used in the bulb of the thermometer.

What is the blue liquid in a thermometer?

The science and development of non-mercury thermometers have made great improvements over the past few years. The blue spirit thermometers listed contain non-toxic isoamyl benzoate and dye. These thermometers can be stored horizontally their separation rate is equal to or better than mercury thermometers.

Which metal is used in thermometer?


Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.

Which luminous substance is in a thermometer?


The correct answer is Mercury. Mercury is used in thermometers because it remains in liquid form throughout a wide range of temperatures i.e -37.89 degrees Fahrenheit to 674.06 degrees Fahrenheit.

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Why is thermometer made of glass?

Glass has a very low coefficient of thermal expansion. This is the reason why thermometer bulb or for a matter of fact entire thermometer is made up of glass. Due to low coefficient of thermal expansion when the thermometer undergoes a large temperature change it will have minimal change in dimensions.

What gets rid of mercury?

Certain types of severe cases of mercury poisoning may require chelation therapy. This is the process of removing mercury from the organs so the body can dispose of it. The drugs used in chelation therapy bind to heavy metals in the bloodstream and are then eliminated in the urine.

Can water be used in thermometer?

Water is not able to be used as a thermometer liquid because of its higher freezing point and lower boiling point than the other liquids in general.

Why are thermometers filled with alcohol?

Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. … If it freezes it won’t move in the tube so a liquid must be used that has a freezing point that’s lower than the temperature it’s measuring.

Why has mercury been replaced by alcohol in a thermometer?

Alcohol thermometers are used in the place of mercury thermometers considering the safety of the chemical compound. Unlike mercury in the mercury thermometer alcohol is less toxic and evaporates quickly.

Why alcohol is not used in thermometer?

Alcohol is not used in a clinical thermometer. It cannot measure the high temperatures because of its low boiling point. Mercury is used in a clinical thermometer.

How would you dispose of the mercury if a thermometer breaks?

Place all materials used with the cleanup including gloves in a trash bag. Place all mercury beads and objects into the trash bag. Place the trash bag outside in a secured area and label it as directed by your local health or fire department.

Can you drink mercury?

Background: The oral ingestion of elemental mercury is unlikely to cause systemic toxicity as it is poorly absorbed through the gastrointestinal system. However abnormal gastrointestinal function or anatomy may allow elemental mercury into the bloodstream and the peritoneal space.

Where is liquid mercury found?

Like other metals mercury is extracted from ores – one of the main varieties being cinnabar. It is found mostly in China Spain and California. Droplets of liquid mercury can actually be found within the ore though it is usually extracted through heating.

Can you wash mercury out of clothes?

Throw all clothing that came in contact with liquid mercury in the trash. … Wash clothing or other items that were exposed to mercury vapor during the cleanup but did not get mercury directly on them. “In no case should a vacuum cleaner or broom be used to remove mercury.

Does mercury vapor go away?

Liquid mercury vaporizes (evaporates) at room temperature causing elevated levels of mercury in indoor air. Mercury vapor is not irritating and has no odor so people do not know when they are breathing it.

What STD was treated with mercury vapor?

Mercury was in use by the early 16th century and remained the primary treatment for syphilis until the early 20th century. Syphilis led to stigmatizing disfigurations that were treated with surgery including pioneering attempts in rhinoplasty.

Does mercury stay in your body forever?

Mercury does not stay in the body forever. It takes about six months to a year to leave the bloodstream once exposure stops. Some researchers think mercury can permanently damage the nervous system in children.

What causes Mad Hatter’s Disease?

Mad hatter disease is caused by prolonged mercury exposure. The exact method of exposure varies by the form of mercury: Elemental mercury. Elemental mercury vapors may be inhaled in workplaces like dental offices smelting sites and mining operations.

Why do fish have mercury?

Mercury occurs naturally in the environment and can also be released into the air through industrial pollution. Mercury falls from the air and can accumulate in streams and oceans and is turned into methylmercury in the water. … Fish absorb the methylmercury as they feed in these waters and so it builds up in them.

What kind of mercury is in a thermometer?

Thermometers with a silver line contain elemental mercury. Thermometers with a red or blue liquid do NOT contain mercury. There is much misinformation about mercury its various forms and its dangers. Three different types of mercury exist varying in their levels of toxicity.

What is the use of the liquid inside the thermometer?

Mercury is the only metal which is in liquid form at natural temperature and due to this property it is being used in thermometer to measure the temperature. With rise in temperature due to capillary action it rises and indicates a measurement on the scale.

Do glass thermometers contain mercury?

Newer glass thermometers do not actually contain mercury but some of them contain a silver-colored liquid so it can be difficult to tell apart. Spilled mercury from a broken thermometer breaks up into little shiny balls that move around quickly.

Which one is filled in the bulb of?

Mercury is filled in the bulb of a thermometer.

What is inside a digital thermometer. Tear down of digital thermometer.

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