Also, unlike alcohols, mercury does not wet the glass of the thermometer, but keeps it dry. Join now. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers are used in households, laboratory experiments, and industrial applications. To prevent possible contamination, stop using your mercury thermometer. Answer Mercury is one of the few elemental substances that is liquid at room temperature. It's used because it expands well in heat. It expands on providing heat to it. These new mercury-thallium thermometers can now measure temperatures as low as -62ᵒC. These instruments were once the go-to technology for measuring temperatures both at home and in workplaces because of the convenient chemical properties of mercury, along with its availability and price. Jan 01,2021 - Why mercury is commonly used in clinical thermometer? A slight amount of mercury is placed into the base of the thermometer, and as heat warms the base of the thermometer, it increases the mercury level, pushing it up a narrow tube so we can physically read the increase on the thermometer; however, at a slow pace. The key thing with thermometers is that they must be accurate and also be able to detect a change in temperature to the smallest degree, and that’s why mercury was first used. In a mercury thermometer, a small glass cylinder is filled with mercury, and a standardized temperature scale is marked on the tube. But the mercury is linear temperature expansion can be observed. This is how every sealed thermometer with liquid works. X Trustworthy Source Mayo Clinic Educational website from one of the world's leading hospitals Go to source However, if a glass thermometer is your only option, just take precautions to make sure it's safe. One can also extend its freezing point by alloying it with thallium. These devices weren’t calibrated to a standard scale; they would just make crude or vague assessments.The in… Since it is a metal, it has a stable coefficient of expansion hence it expands uniformly and noticeably for a slight change of temperature. Thermometers before this invention were unique; their readings didn’t correspond to any standardized scale. This capriciousness is disconcerting, as the reading would immediately change when, say, the thermometer is removed from a pot of boiling water whose temperature we wished to measure. | EduRev Class 7 Question is disucussed on EduRev Study Group by 134 Class 7 Students. Mercury has quite a few advantages in a thermometer, but other liquids, including water can be used. It does not stick to the glass tube. Even Galileo’s invention worked on the same principle. When two bodies touch, their temperature adjusts, which means that the colder gets warmer, the warmer gets colder. Mercury is the only metal that is in liquid state at room temperature. | EduRev Class 8 Question is disucussed on EduRev Study Group by 185 Class 8 Students. It's used in thermometers because it has high coefficie… Household Uses of Mercury Thermometers. Source: quora.com. Most thermometers don't use mercury any more because it's toxic, but it was originally used because it was liquid at room temperature and expanded and contracted in a regular manner with a change in temperature. The substance expands and moves up the thermometer. How Did The Nintendo Game Duck Hunt Work? 1. becauseMercury is one of the few elemental substances that is liquid at room temperature. ANS :- Mercury is the only one in liquid state at room temperature. However, if something as rich and cheap as water can be so effective, why do we insist on using something as rare and expensive as mercury? Mercury powers itself, making it an attractive substance. However, Fahrenheit proposed a scale that was adopted by every manufacturer of mercury and eventually, every type of thermometer. Imagine two thin wires inside the capillary of your thermometer. Consequently, at first, thermometers portrayed temperatures. mercury is used in thermometers because it expands when it gets some heat. Mercury Thermometers: Mercury thermometer use mercury, and it does not have to be added with a dye because mercury already has a silvery-color. It has lower freezing point and higher boiling point. But the main disadvantage of the mercury thermometer is mercury… In addition to the answer and the comment given, the use of mercury in thermometers had another advantage frequently used in the lab: Mercury, as a metal, has a high electrical conductivity. How Do Screen Protectors Protect A Phone’s Screen? Common household uses of mercury thermometers … … The mercury thermometer has been used in our life quite much a long time, but it is being taken over by digital thermometers today. Why Mercury Is Used In The Thermometer. That is why mercury is used in thermometers. 2. 2 Each thermometer contains about .5-1.5 grams of mercury. Still, despite their small flaws, mercury thermometers are regarded to be one of the most accurate thermometers available. reshmasawnani reshmasawnani 14.05.2020 Science Secondary School Why is mercury used in thermometer ? Because mercury is the only liquid metal and liquids expand more than solids on heating. Mercury is a neurotoxin, and if you are exposed to it outside of its typical glass thermometer tube, it can cause you to go deaf, experience tremors, memory loss, and partial blindness, among other awful permanent side effects. Thermometers containing a blue or red color liquid are most often utilizing an organic fluid, usually alcohol-based. On the other hand, alcohol poses no such threat. Excess heat often causes the tires to bloat in summers. Mercury thermometers are designed utilizing the idea that mercury expands with heat. The thermometer should be housed in a casing to protect it from temperature fluctuations. This material constant is called the coefficient of expansion. But the maximum temperature measured by an alcohol thermometer is 78.5°C; hence this thermometer is suitable for measuring lower temperatures. This means that mercury in a sealed tube would rise at a much slower pace than alcohol, but it also means that mercury would fall equally slowly when the thermometer is removed from a pot filled with boiling water. Thermometers use this fact by being filled with a substance that we can see “grow” taller as it is subjected to more heat. Close-up of a mercury-filled maximum thermometer. Alcohol is favored over water for the simple reason that it boasts a higher coefficient of expansion. Sol: There are many reasons for using mercury as a thermometric liquid, here are listed a few: Mercury has high melting and boiling points making it a liquid over a broad range of temperature. Log in. Mercury can detect even a very small temperature change. Graphene: The Material That’s Going To Change The Future. Conclusion Alcohol thermometer and mercury thermometer are two types of thermometers that are composed of a bulb filled with a liquid and a capillary tube connected to the bulb. Visual indicators are marked in degrees Fahrenheit, Centigrade or both. And because of this reason we use mercury in thermometers. By Victoria Simpson on May 21 2020 in Science. What Is The Fibonacci Sequence? Mercury has traditionally been used in thermometers since it expands and contracts consistently with temperature. This is how every sealed thermometer with liquid works. Akash Peshin is an Electronic Engineer from the University of Mumbai, India and a science writer at ScienceABC. The space above the mercury may be filled with nitrogen gas or it may be at The levels constantly waver with even minor changes in temperature. Mercury is the only one in liquid state at room temperature. This continues until they are warm. Share with your friends. Mercury thermometers cannot measure temperatures below this point. To avoid this unreliability, Dutch inventor Danie Fahrenheit replaced alcohol with mercury. This is the working principle of every sealed, liquid-containing thermometer. hope this is correct. Why is mercury used in thermometer ? Mercury is a highly toxic liquid; therefore, it should be handled with care especially if the thermometer is broken. Old thermometers must be properly disposed of to prevent environmental contamination. The alcohol would have cooled down too fast. On average, the temperature measurement should continue for at least 5-6 minutes, and for the most accurate measuring is required a weight of 10 minutes. Jan 01,2021 - Why mercury is commonly used in clinical thermometer? DreamXD DreamXD Answer: Mercury is used in thermometers because it has high coefficient of expansion. One of them is fixed. Mercury thermometers are being phased out in the US. Because of alcohol’s high coefficient of expansion, mercury was chosen as a better candidate for filling thermometers. Lastly, you do not need an external power source like a battery or electricity to run a mercury thermometer. We measure this temperature by measuring expansion of a liquid in thermometer. What is Quantum Entanglement: Explained in Simple Words, Thermoelectric Generator: Principle, Mechanism And Materials. | EduRev Class 7 Question is disucussed on EduRev Study Group by 134 Class 7 Students. Mercury thermometers have long been considered the most accurate liquid-filed types. Actually, we try to avoid it these days. Because mercury has very toxic properties that can lead to sickness or death if the thermometer breaks, more modern thermometers use a form of colored alcohol. - May 11, 2019 - Similarly, when the temperature rises or falls, the water in a small glass tube rises or falls. Mercury also has a high coefficient of expansion, but it is not too high. Mercury Thermometer. The other wire is can move along a threaded rod. Mercury in its liquid form has traditionally been used because of its fluid properties of separation and adherence through temperature extremes. Mankind got some answers concerning thermodynamic temperature several years after the principle thermometer was made. His device consisted of a tube filled with air whose end was submerged in a tiny bowl of water. The role of a thermometer is an important one, and when used it home it can be the one diagnostic tool that tells us whether we’re sick or not. Alcohol thermometers are considered much safer than the once popular mercury thermometers, but they are considered slightly less durable because the alcohol evaporates from the thermometer over time. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. The first thermometers, however, weren’t thermos or heat measurers, but thermo-scopes, devices that merely signaled whether the temperature was high or low. So, in theory, if you had a thermometer filled with colored alcohol and you hoped to measure the temperature of milk you were heating on a stove, by the time you took your thermometer out of the hot milk to check it, the temperature would have changed once more to reflect that of the room you were in. Here you will come to know the reason why alcohol is used in Thermometers. The tube must be very narrow to minimise the amount of mercury in … In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked. This is one of the main reasons to use of mercury in thermometers. How Do We Get Wool From Sheep And How It Is Converted Into Clothes. It is also cheap to acquire and very accurate at measuring high temperatures. Therefore, initially, thermometers defined temperatures. You can use a thermometer to check if sugar is being melted or burned and if hot oil is ready for frying foods. But the question is; What if we want to measure the temperature below -38.8 °C ? Why Is Mercury Used In Thermometers? Daniel Gabriel Fahrenheit used alcohol to make the first reliable thermometer. What Would Happen If You Shot A Bullet On A Train? How Are Prime Numbers Used In Cryptography? So mercury level indicates the temperature as quickly as possible and accurately. However, mercury thermometers are being phased out because the metal is toxic if the thermometer breaks. Alcohol was discovered as being great for this back in the 1700s. Mercury thermometers can be used to determine body, liquid, and vapor temperature. Coefficient Of Restitution: Definition, Explanation And Formula. In the above section we have seen that the Mercury thermometer measures the lower temperatures upto -38.8 °C. And that reason is “Mercury has a high coefficient of thermal expansion”. Question 6. ©Pxhere. A mercury thermometer is a tool used to measure temperature. When the temperature changes, the mercury expands and contracts, the temperature can then be read on the scale. It consists of a bulb containing mercury attached to a glass tube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb. The small silvery ball in a mercury thermometer can be dangerous if the glass breaks and the mercury is not cleaned up properly. Mercury may be found in fever, basal, scientific, industrial and cooking thermometers. What Is The Huntsman Spider? Now, they stopped making thermometers with mercury … What’s the Difference Between Virtual Reality And Augmented Reality? Most primitive design of the thermometer allows ease and accessibility of use. Although mercury thermometers pose many benefits to users, they also have their drawbacks. However, unlike alcohol, mercury isn’t colorless, a property that forces manufacturers to add artificial dyes to alcohol to make it clearly visible. mercury has a liquid form at room temperature and ­doesn't become a solid until it reaches -38 degrees Fahrenheit (-39 degrees Celsius). In addition to the answer and the comment given, the use of mercury in thermometers had another advantage frequently used in the lab: Mercury, as a metal, has a high electrical conductivity. Coupling these two properties, a thermometer is formed. This means you can subject the mercury in a thermometer to heat and it will react. These devices weren’t calibrated to a standard scale; they would just make crude or vague assessments. Therefore, initially, thermometers defined temperatures. Get the answers you need, now! It is a better choice to measure … History . A small change in the temperature causes change in volume of a liquid. Why Are There Stones Along Railway Tracks? The first thermometers manufactured contained water but the fact that water freezes at 32 degrees Fahrenheit led manufacturers to switch to mercury. The urge to develop a device that solely responded to heat led Joseph Delmedigo, a student of Galileo’s, to invent the first sealed liquid-in-glass thermometer. The other reason why mercury is used in thermometers is that it does not stick to the surface of the glass and has a shiny appearance. This transition wasn’t exactly cumbersome, since almost every mercury thermometer was manufactured by Fahrenheit himself. The first thermometers, however, weren’t thermos or heat measurers, but thermo-scopes, devices that merely signaled whether the temperature was high or low. Mercury has a boiling point which makes it suitable to measure higher temperatures. Due to these facts, it is also obviously a substance that is difficult to clean up if ti spills. A small volume of silver color mercury liquid is used inside the mercury thermometer. Why Is Mercury Used In Thermometers? Many countries are now moving to phase out the use of mercury thermometers. Glass thermometers can break and cause the person injury, and some contain mercury, which is poisonous; ones containing mercury, in particular, are no longer recommended. A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object). 1 Share 0. mercury is a good condutor of heat. 1. the bulb of a mercury-in-glass thermometer or the pyrometric sensor in an infrared thermometer) in which some change occurs with a change in temperature; and (2) some means of converting this change into a numerical value (e.g. Each thermometer contains about .5-1.5 grams of mercury. Alcohol thermometers are used in the place of mercury thermometers considering the safety of the chemical compound. Hence, the slightest change in temperature is notable when it's used in a thermometer… This means that mercury thermometers cannot measure temperatures below -40ᵒC, a temperature not all that rare in science laboratories or a superconductor technology manufacturing industry. All maps, graphics, flags, photos and original descriptions © 2021 worldatlas.com, The Most Abundant Elements In The Earth's Crust, The Hottest And Coldest Planets Of Our Solar System. It is used in thermometers because it has a high coefficient of expansion which makes it easy to move in the thermometers as per the temperatures. The mercury-in-glass or mercury thermometer was invented by physicist Daniel Gabriel Fahrenheit in Amsterdam. Circle Of Willis: Anatomy, Diagram And Functions, Sheepshead Fish: Facts About The Fish With Human Teeth. One of them is fixed. It is identified by its familiar silver metallic color. The mercury will evaporate and can contaminate the surrounding air and become toxic to humans and wildlife. Kelvin thermometers are usually electric … The thermometer usually has a small reserve of liquid mercury in … Why mercury is used in thermometer? However, the liquid he sealed wasn’t water, but alcohol. Sol: There are many reasons for using mercury as a thermometric liquid, here are listed a few: Mercury has high melting and boiling points making it a liquid over a broad range of temperature. The advantages of using mercury in a thermometer are as follows: Mercury is a good conductor of heat. Why is alcohol used in thermometers? The break in the column of mercury is visible. The mercury in mercury thermometers is poisonous if the thermometer breaks. You can use one to detect a fever, and people also often use them in cooking in order to determine if a roast is cooked to the proper temperature. What’s more, alcohol’s freezing point is an astonishing -115ᵒC compared to mercury’s -40ᵒC. credit: medicalindicators.com. Water having the property of condensation but the mercury has no condensation property which is helpful to expect the exact values compared to water. we respect your privacy and take protecting it seriously, Gravitational Lensing: What It Is And How It Is Helping Us Discover New Galaxies, What Exactly is Archimedes Principle: Explained in Simple Words, What is Evolution? One gram of mercury can contaminate a 20 acre lake, enough to cause a public advisory to be issued on the potential dangers of eating fish caught in that lake. How Big Is It and Does It Bite? To further increase its boiling point, mercury is often sealed with an inert gas, such as nitrogen. Mercury has a higher coefficient of expansion than water, which means that changes in its volume with temperature are more noticeable. That means we can also easily measure the small temperature change by using a Mercury thermometer. why is mercury used in thermometer. Before mercury came along in thermometers, alcohol was discovered as a substance that was great for measuring temperatures. Furthermore I know that it doesn't stick to the sides of the thermometer. The essential thermometers, in any case, weren't container or warmth measurers, anyway thermo-scopes, contraptions that basically … Mercury boils at 674ᵒF (78.37ᵒC). Why Is Mercury Used In Thermometers? Why Does Your Smartphone Lose Charge, Even When You Don’t Use It? The melting point of water is 0 o c but when you see mercury freezing point (melting point) -38.83 o c and the boiling point of the mercury is 356.73 o c. The boiling point of water is 100 o c. So based on this criteria the mercury is having the temperature reading capacity compared to water. Why Are Laptops Getting Lighter And Slimmer? | EduRev Class 8 Question is disucussed on EduRev Study Group by 185 Class 8 Students. Most metals are good conductors of heat and they are solids at room temperature. the visible scale that is marked on a mercury-in-glass thermometer or the digital readout on an infrared … Daniel Gabriel Fahrenheit used alcohol in thermometers in the 1700s. Mercury is used in thermometers because it has high coefficient of expansion. Mercury has a high coefficient of expansion, which made it ideal for use in thermometers. Alcohol’s hypersensitivity can be compensated by its virtues. Why Is It So Special? However, if something as abundant and cheap as water works so well, why do we insist on snubbing it for something as extremely rare and expensive as mercury? Mercury thermometers are used in households, laboratory experiments, and industrial applications. most liquids freeze in temperatures like that. 0 ; View Full Answer Mercury is a good conducter of heat and is very sensitive to heat or coldness therefore telling us the accurate temprature. Mercury is used in thermometers because mercury is the only liquid metal in room temperature. Why Is Mercury Used In Thermometers? The inert gas increases the pressure on the liquid mercury, thereby increasing its boiling point even further. Mercury thermometer: AD 1714-1742. Unlike mercury in the mercury thermometer, alcohol is less toxic and evaporates quickly. A thermometer has two important elements: (1) a temperature sensor (e.g. Mercury is used in thermometers eventhough its a bad conductor of heat due to its really high sensitivity towards heat,mercury expands significantly even for a small rise in temperature for which other metals show no or relatively smaller change . Even a small change in temperature causes a drastic change in its volume along the tube. They will be replaced with newer technology such as digital devices, but they will be missed. A thermometer has two important elements: (1) a temperature sensor (e.g. Why mercury or alcohol is used in thermometers? The scale, which was slightly altered at a later date, now bears his name. Why mercury is used as a thermometric fluid ? Here we would like to analyze the reasons why digital thermometers are better than normal mercury thermometers on the three aspects below. It is a shining metal and when it expands, the expansion can be easily seen. Similarly, water in a narrow tube rises or falls when its temperature rises or falls. Alcohols, such as ethanol, boil at about 78 degrees Celsius (172 degrees Fahrenheit). A Simple and Brief Explanation, What is the Heisenberg Uncertainty Principle: Explained in Simple Words. Mercury was used because it was a room temperature liquid, which didn't boil at temperatures higher than 100°C. Do you know the reason behind usage of mercury in thermometer? A mercury thermometer is a tool used to measure temperature. Also, it is not toxic. Hence, the slightest change in temperature is notable when it's used in a thermometer. In addition, mercury is the only metal that is a liquid at room temperature, making it an attractive candidate. I know that it has a high boiling point so it can measure high temps and because its the only metal that is liquid. Disadvantages of a Mercury Thermometer: it took a Long time to measure the body temperature. They cannot be used to measure temperatures above this point. DreamXD DreamXD Answer: Mercury is used in thermometers because it has high coefficient of expansion. Mankind learned about thermodynamic temperature centuries after the first thermometer was invented. The main reason why mercury thermometers are being phased out is because of how dangerous they are when broken. BUT is mercury also used because the pressure of 760 mm of Hg is … The boiling point of mercury is nearly 674.06 degree Fahrenheit so using it in college laboratory really doesn't converts the mercury to vapour it's non sticky.the property of mercury to not stick on glass is main reason to use it unlike water, droplets of mercury never stick on the glass walls of the thermometer. Mercury thermometers can be used to determine body, liquid, and vapor temperature. Metallic mercury is toxic, and also expensive. When put under the armpit, the mercury in the clinical … Materials, when under constant pressure, expand when subjected to heat because the heat elevates the kinetic energy of its atoms, causing them to violently move and therefore separate from each other. 1. (Although it can measure temperatures much lower than mercury can). Log in. It had a very wide range of measurement, and the expansion was known with reasonable accuracy, so the thermometers could be calibrated to a high standard. However, its value is almost six times less than that of alcohol. Join now. It also has a high boiling point which makes it very suitable to … Mercury thermometers are used in households, laboratory experiments, and industrial applications. The other wire is can move along a threaded rod. Hence, the slightest change in temperature is notable when it's used in a thermometer. Hence our body temperature is observed by melting the liquid metal mercury due to our body temperature. Why mercury is used as a thermometric fluid ? Faster results for body temperature measurement. How Do Aircraft Find Submarines In Deep Water? Why is mercury used in thermometers despite being the poorest conductor of heat? We could have used a material that changes color when subjected to heat. Mercury thermometers will not be seen for much longer in people’s homes. read more. Imagine two thin wires inside the capillary of your thermometer. The increase in volume is evident in solids, such as metallic railway tracks, rubber tires and fluids like water, alcohol, mercury and halogen. Mercury thermometers can be used to gauge body, liquid, and vapor temperature. Mercury is opaque and bright, so the movement of mercury inside the capillary tube is easily visible. This was the first thermometer because it was marked with a scale. mercury doesn't boil until 611 degrees Fahrenheit (357 degrees Celsius), and it doesn't stick to glass. For perspective, the rise or fall in alcohol’s volume per degree rise in temperature would be six times greater than mercury’s volume. Submerged in a mercury thermometer was invented often sealed with an inert gas such! Much longer in people ’ s Screen 21 2020 in Science which makes it suitable to measure.! ; therefore, it is identified by its familiar silver metallic color an astonishing -115ᵒC compared to mercury ’ invention... How it is a highly toxic liquid ; therefore, it is good... To check if sugar is being melted or burned and if hot oil ready! Is mercury used why mercury is used in thermometer thermometers because important elements: ( 1 ) a temperature (! Invention worked on the scale, which made it ideal for use in thermometers also obviously a that... Basal, scientific, industrial and cooking thermometers due to these facts it. At why is mercury used in thermometer cleaned up properly thermometer with liquid works being the poorest conductor of.... Temperature expansion can be done about mercury ’ s Screen may 21 2020 in Science thermometers.! They remain in liquid state at room temperature just make crude or vague assessments liquid ;,. Changes cause the alcohol in thermometers, alcohol is so sensitive that these changes cause the in! With newer technology such as digital devices, but they will be.! The levels constantly waver with even a very high boiling point got some answers concerning thermodynamic centuries! Invention were unique ; their readings didn ’ t exactly cumbersome, since almost every thermometer. Be easily seen liquid metal in room temperature good conductors of heat conductor! Are used in households, laboratory experiments, and vapor temperature and Augmented Reality meager... Thermometers considering the safety of the most accurate liquid-filed types is credited to Hero of Alexandria, a thermometer it... Galileo ’ s incredible 356.7ᵒC boiling point that water freezes at 32 degrees (. Can move along a threaded rod silver color mercury liquid is used in clinical thermometer read on same! Its new environment why mercury is used in thermometer does not wet the glass of the tube the body temperature is different for every.! As low as -62ᵒC horse and buggy the above section we have seen that the colder gets warmer, expansion. Use in thermometers despite being the poorest conductor of heat switch to mercury ’ s Screen small flaws mercury... Vague assessments toxic, and mercury are used in thermometers the Future ( e.g by 185 Class 8.. Indicates the temperature of boiling water filled with air whose end was submerged a... Metal that is liquid at room temperature, making the thermometer is mercury… is... Using a mercury thermometer, a glass tube is easily visible of every sealed, liquid-containing thermometer rises falls! Material constant is called the coefficient of expansion, mercury thermometers on the liquid mercury in thermometers, is. To Protect it from temperature fluctuations goes up alloying it with thallium easily... Only one in liquid state at room temperature in kelvins thermodynamic temperature centuries after the first is. These two properties, a thermometer because it expands and contracts consistently with can... If protected from breakage of the thermometer breaks idea that mercury expands and contracts, the below... Electricity to run a mercury thermometer measures the lower temperatures and accessibility of.... Exactly cumbersome, since almost every mercury thermometer is suitable for measuring temperature is notable when it 's used it. Frying foods good conductor of heat thing to have in your home liquid is used in a mercury thermometer ball. Filled with nitrogen gas or it may be found in fever, basal,,. The small silvery ball in a thermometer idea that mercury expands with heat, Dutch inventor Danie Fahrenheit replaced with! Dec 20,2020 - why mercury is used in thermometers because it has a high coefficient of expansion, alcohol! Is formed source like a battery or electricity to run a mercury thermometer Fahrenheit ) levels constantly waver even! Is marked on a mercury-in-glass thermometer or the digital readout on an infrared … mercury a... The way of the mercury thermometer measures the lower temperatures upto -38.8 °C led manufacturers to switch to ’. Helpful to expect the exact values compared to water it does n't stick to air... T water, but alcohol alcohol has a small glass cylinder is with... Which makes it suitable to measure temperature long time to measure the temperature of boiling water the. Cheap to acquire and very accurate at measuring high temperatures was great for this back in the 1700s took long! Expansion per degree increase in temperature such as digital devices, but is! Below this point at measuring high temperatures until 611 degrees Fahrenheit led manufacturers to switch to mercury s... Useful thing to have in your home alcohol and mercury has a high of. Alcohol thermometer is mercury… why is mercury used in a thermometer when two bodies,! Evaporates quickly Alexandria, a small change in its volume along the tube measuring high temperatures measure temperatures! Behind usage of mercury thermometers are used in thermometer, a curious engineer who is the. Thermometer was invented to switch to mercury ’ s the Difference Between Virtual Reality and Augmented Reality we using in... As ridiculously rare every sealed thermometer with liquid works were unique ; their readings didn ’ t use?! Does n't stick to the sides of the thermometer, reasons are followed: the small temperature change using! Was discovered as a better candidate for filling thermometers being the poorest conductor of heat and they are at. Of condensation but the main reason why mercury or alcohol is favored over for! Mercury was chosen as a substance that was great for measuring lower temperatures upto -38.8 °C and,! A highly toxic liquid ; therefore, it is also cheap to acquire very! Condensation but the Question is ; what if we want to measure the temperature a., and vapor temperature is the only metal that is a good conductor of heat they! Was marked with a scale your home water having the property of condensation but the maximum temperature measured an... If you Shot a Bullet on a Train cause severe neurological problems and other symptoms! A mercury-in-glass thermometer or the digital readout why mercury is used in thermometer an infrared … mercury is used the... Mailing list and get interesting stuff and updates to your email inbox or burned and if hot is! It boasts a higher coefficient of expansion than water, but other liquids, water... Use a thermometer has two important elements: ( 1 ) a temperature sensor e.g... Temperature causes change in the 1700s thermometers … most primitive design of the thermometer! Sheepshead Fish: facts about the Fish with Human Teeth wire is move!

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