Of course, identifying whether it is really mercury in your thermometer is an important step, however, it is always better to be safe than sorry. Mercury thermometers can be used to … In several states, in the US now it is even illegal to sell, use and distribute mercury thermometers, and many countries have even bans this simple medical device in hospitals and schools. 2. Traditional thermometers use thermometric liquids (i.e., alcohol, mercury) to measure temperature in body cavities -- orally, rectally, vaginally -- or at other axillary points, such as the underarm 1 2. Bimetal foil thermometer: consisting of two metal foils with different coefficients of expansion. Gas thermometers work best at very low temperatures. Therefore, initially, thermometers defined temperatures. The thermometer usually has a small reserve of liquid mercury in its base, which is most often pressurized; above it is usually a glass or synthetic tube with a calibrated temperature scale. What Are The Uses of Mercury in Glass Thermometer? The glass stem of a thermometer is thick and acts as a cylinder lens. An old type of mercury clinical thermometer - close up image by Werg from, Environmental Protection Agency: Phase-Out of Mercury Thermometers Used in Industrial and Laboratory Settings, University of Maryland Medical Center: Temperature measurement - Overview. The first thermometers, however, weren’t thermos or heat measurers, but thermo-scopes, devices that merely signaled whether the temperature was high or low. How Do I Remove Black Stain from Silver Nitrate Easily? or the right temperature to get the meat thermometers and start cooking. Other benefit of using mercury in glass thermometers is that the material has a high boiling point. The thermometer also a very important feature to most machinery such as chemical tanks, vats, heating, and cooling equipment that make sure the factory production runs smoothly and safely. There are even greener choices such as battery and solar-powered digital thermometers. It is used in the form of gaseous vapors in vapor lamps, neon signs, and fluorescent lamps. Pyrometers, which are high temperature thermometers that are used in factories, baking ovens, etc. Continue shaking until reading is below 35.6° C (96° F). Glass mercury thermometer shows the high temperature of the human body on its scale. A glass mercury thermometer shows the high temperature of the human body on. Why Should You Be Careful When Handling Silver Nitrate? But the main disadvantage of the mercury thermometer is mercury. Mercury in its liquid form has traditionally been used because of its fluid properties of separation and … The mercury thermometer, made up of a sealed glass tube containing mercury. The foremost liquid-in-glass thermometer was introduced in the year 1650 in which the liquid filled in was spirit from wine. For this you must use a cotton ball soaked in alcohol and wipe the thermometer bulb, i.e. Mercury thermometers are simple and can give an acurate measurement. It has varied applications in homes, hospitals, science laboratories, restaurants and industrial processes for different purposes such as measuring the temperature of the human body, food, chemical reactions, air leaks, indoors/outdoors, etc. You can check out the chemical experiments, or the water and acid temperature for certain degrees, blood banks, ovens, and incubators for all it purposed. The rest of the tube may be a vacuum, or it may be filled with nitrogen. When the temperature changes, the mercury expands and contracts, the temperature can then be read on the scale. Mercury thermometers can be used to gauge body, liquid, and vapor temperature. A-Z Chemicals Banned Under FIFRA – Harmful Substances, 8 Helium Uses in The World – Elements and Properties. Mercury thermometer is a type of thermometer that uses a bulb filled with mercury as the temperature sensor. Mercury-in-glass thermometer: | | ||| | Mercury-in-glass thermometer for measurement of room t... World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled. Make sure the thermometer is not used for the ear containing a lot of wax. Why Should You Not Play With The Chemicals In The laboratory. The Dangerous Effects! A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object). The United States Environmental Protection Agency announced in 2010 that it will be working with industrial stakeholders and laboratories to phase out mercury-containing thermometers to reduce the release of mercury into the environment through spills, disposal and breakage. You can answer your question very easily by rephrasing it as follows. As we have established, the main use of a thermometer is to measure temperature. They were simple, inexpensive, long-lasting, and able to measure a wide temperature span. Mercury, which is a chemical element, rises and falls in response to temperature changes, and watching where it stops along the scale provides a reading of how hot or cold a particular substance is. In some cases, there are federal or state regulations that require the use of mercury-containing thermometers, although some alternatives such as digital thermometers and non-mercury liquid-in-glass thermometers are being used more frequently. A mercury-in-glass thermometer can form the basis of a simple on/off temperature controller that will control the temperature of an enclosure at any value between 40°C and 350°C. Because it has high coefficient of expansion. For this reason, a common form of thermometer contains a liquid in a narrow glass tube. 94.02 Subject: EQUIPMENT--Discontinuance of field use of mercury liquid-in-glass thermometers The purpose of this memorandum is to announce that mercury liquid-in-glass thermometers are no … 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 mercury-in-glass or mercury thermometer was invented by physicist Daniel Gabriel Fahrenheit in Amsterdam (1714). Why mercury used in thermometers instead of water? Patrick has a journalism arts diploma and a Bachelor of Arts in general humanities from the University of Calgary. Privacy Policy | The rest of the tube may be a vacuum, or it may be filled with nitrogen. In thermometer. The space above the mercury may be filled with nitrogen gas or it may be at less than a… The principle used to measure temperature is that of the apparent thermal expansion of the liquid. A thermometer is an instrument that measures the temperature of any solid, liquid or gaseous matter. Clinical thermometers, also known as medical thermometers or doctors' thermometers, are used to take body temperatures in humans and animals 1 2. Following are the major advantages associated with the use of liquid-in-glass thermometers: They are comparatively cheaper than other temperature measurement devices. 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. The thermometer … Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Thermometers come in several types, but the liquid-in-glass mercury thermometer is one of the most well-known. Mercury-in-glass medical thermometers‎ (1 C, 37 F) Media in category "Mercury-in-glass thermometers" The following 14 files are in this category, out of 14 total. Mankind learned about thermodynamic temperature centuries after the first thermometer was invented. Alcohol Thermometers can leak easily and wet the wall, leading less accurate and slow readings. That is why the use of mercury thermometers in prohibiting medical and health care institutions. The thing about Mercury thermometers is its diverse applications. The open end was immersed upside down in a mixture of alcohol with water and when heating the liquid, it went up the tube until it reached the sphere depending on the temperature. Adchoices | Another type is a digital thermometer, which uses electronics to measure temperature. A mercury-in-glass thermometer, invented by German physicist Daniel Gabriel Fahrenheit, is a thermometer consisting of mercury in a glass tube. Thermometers have myriad uses in science, engineering, industry, medical facilities and daily living. In a mercury thermometer, a glass tube is filled with mercury and a usual temperature scale is marked on the tube. A typical liquid-in-glass thermometer is shown in the figure below. Mostly Mercury and alcohol are used in glass thermometers. Mercury is a good electrical conductor. If there is a paper calibration strip inside of the thermometer that includes the words “mercury free,” then the liquid in the thermometer is not mercury. Mercury is the only one in a liquid state at room temperature. How Often to Disinfect a Thermometer . Yes, you probably and most likely have seen the common household mercury glass thermometer in the kitchen or medicine cabinet. Another type is a digital thermometer, which uses electronics to measure temperature. Mercury has a low freezing point relative to alcohol (- 3.89 degrees C centigrade, 25 degrees F) and as a result it cannot be used in colder areas. However, if a glass thermometer is your only option, just take precautions to make sure it's safe. Liquids used in glass thermometers. It also has a high boiling point.This video is about: Why Mercury is Used in Glass Thermometer.. It is very reflective, so it's easy to see and to read accurately. Definition of mercury-in-glass thermometer in the Definitions.net dictionary. The mercury is forced up through the constriction … “In the LIG thermometer the thermally sensitive element is a liquid contained in a graduated glass envelope. Meaning of mercury-in-glass thermometer. The size of the mercury thermometers itself is only a strip of a straw with a silvery-white liquid in it. It can be used for power plants and piping in an enormous size and temperature that can have a very huge impact in the industrial field. Later on, more linear thermometers were developed with the use of mercury as a liquid inside the thermometer. Mercury has been frequently used in thermometers because it remains in liquid form throughout a wide range of temperatures: -37.89 degrees Fahrenheit to 674.06 degrees Fahrenheit. Information and translations of mercury-in-glass thermometer in the most comprehensive dictionary definitions resource on the web. Before using the mercury thermometer we must always clean it to ensure that it is properly disinfected. depends on the purpose or application for which you want to use the thermometer. 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. One of the popular mercury thermometers called ASTM-type is commonly used in industrial, scientific and commercial purposes. Mercury is poisonous and is being phased out of use in many industries. Mercury (liquid in glass) thermometer Mercury thermometers were once the only option available for taking temperature. 17 Uses of Potash in Agriculture Fields – Plants Growth. The volume of mercury changes slightly with temperature; the small change in volume drives the narrow mercury column a relatively long way up the tube. Moreover, with changes in temperature, it can be referred to from the thermometer itself. Mercury-in-glass thermometer 3 Phase out Today, many mercury-in-glass thermometers are still widely used in meteorology; however, they are becoming increasingly rare for other uses, as many countries have banned them outright from medical use. Mercury sphygmomanometers (blood pressure meter) and various other laboratory equipment also make use of mercury. Do you know the reason behind usage of mercury in thermometer? It is the presence of mercury (about 2 grams) – hazardous substances for health and glass design “thermometer” that can be easily broken up, negates all the advantages of mercury thermometer compared with all the others. The height at which the mercury rests corresponds to calibrated marks on the side of the tube, allowing you to read the temperature of the item or air that is being measured. A thermometer has two important elements: (1) a temperature sensor (e.g. In smaller scale usage for home industrial usage such as breweries, canneries, bakeries, candy making, dairies, wineries a simple mercury thermometer can have a major impact on the quality of processed food. Mercury is dangerous and banned or restricted in many fields in various countries. As the mercury heats up, it rises in the tube, and as it cools, it retracts back into the bulb. getting the right temperature can be daunting without the proper tools. Due to safety concerns, … Disclaimer | Mercury-in-glass thermometer 1 Mercury-in-glass thermometer Closeup of a maximum thermometer. In a mercury thermometer, a glass tube is filled with mercury and a usual temperature scale is marked on the tube. Briskly shaking lowers mercury level in glass tube. The range of a liquid-in-glass thermometer is limited by the liquid, by the glass, and by the construction. What Happens If You Mix Zopiclone With Alcohol? Mercury will freeze solid at -37.89 degrees F, and if there is nitrogen in the space above the mercury, it will flow down and become trapped below the mercury when it thaws. The capillary or stem is the tube through which the mercury flows. Calibrated marks on the tube allow the temperature to be read by the length of the mercury within the tube, which varies according to the heat given to it. There are Harmful effects Chemicals Living Things that lurking behind the common daily life such as the mercury thermometers for determining the body, liquid, and vapor temperature from the households all the way to industrial usage. This thermometer consists of a glass bulb and stem filled with a working liquid (alcohol or mercury) and an inert gas. “A maximum thermometer is a unique kind of mercury thermometer which functions by having a constriction in the neck close to the bulb. A mercury thermometer measures temperature by changing the volume of the mercury in the thermometer. Remove the thermometer from the ear and clean the tip with cotton and alcohol. That is Why Should You Not Play With The Chemicals In The laboratory. These devices weren’t calibrated to a standard scale; they would just make crude or vague assessments.The i… Thermometers measure temperature, by using materials that change in some way when they are heated or cooled. For this reason, mercury thermometers are not recommended for cold climates and should be brought indoors when the temperature starts dipping below -30 degrees. Glass mercury thermometer. In a thermometer, a glass bulb attached to a glass capillary tube is filled with mercury. Dangerous than a Broken Thermometer? For example, if you measure the temperature of the air outside, you will know how to dress appropriately. Thermometers such as mercury thermometers, alcohol in glass thermometer, constant pressure gas thermometers, and platinum resistance thermometers are designed on the basis of technology. The mercury filled bulb is connected to a glass tube which has a capillary tube inside it. The thermometer usually has a small reserve of liquid mercury in its base, which is most often pressurized; above it is usually a glass or synthetic tube with a calibrated temperature scale. Other liquids, such as kerosene or ethanol , may also be used in these types of thermometers. Is It Dangerous? Mercury is difficult to clean and it can easily contaminate other surfaces after a thermometer breaks. Mercury In Glass Thermometer Safety Data Sheet Effective date: May 29, 2015 According to 29 CFR 1910:1200 and GHS Rev. Liquid-In-Glass Thermometers . This makes it easy to see the liquid level in the glass tube. In a mercury thermometer, a small glass cylinder is filled with mercury, and a standardized temperature scale is marked on the tube. In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. It can be used for power plants and piping in an enormous size and temperature that can have a very huge impact in the industrial field. Liquid in glass thermometers are the cheapest kind of thermometer, and are also easy to use. One type of thermometer is a narrow, concealed glass tube containing mercury or alcohol which extends along the tube as it expands. Calibrated marks on the tube allow the temperature to be read by the length of the mercury within the tube, which varies according to the heat given to it. Best used to measure high temperatures, mercury thermometers are still widely used in meteorology and in high temperature places such as autoclaves, which are high-pressure vessels used to sterilize or process equipment. In several states it is now illegal to sell mercury thermometers, and many countries have banned the use of mercury thermometers in hospitals and schools. “A maximum thermometer is a unique kind of mercury thermometer which functions by having a constriction in the neck close to the bulb. Mercury thermometers provide accurate temperature readings and can be used orally, rectally, or under the arm. Contact Us | The glass tube measurement with mercury becomes a standard scale by watching the mercury element going up and down the scale. A thermometer is an instrument for measuring or showing temperature (how hot or cold something is). Alcohol thermometers, infrared thermometers, mercury-in-glass thermometers, recording thermometers, thermistors, and Six's thermometers are used outside in areas which are well-exposed to the elements at various levels of the Earth's atmosphere and within the Earth's oceans is necessary within the fields of meteorology and climatology. The use of the mercury thermometer is contraindicated due to health risks, such as respiratory problems or skin damage, but there are also currently glass thermometers similar to the old mercury, called analog thermometers, which do not have mercury … Calibrated marks on the tube allow the temperature to be read by the length of the mercury within the tube, which varies according to the heat given to it. A temperature scale devised in this way using mercury is known as a “mercury-in-glass” scale. Thermometers are typically constructed of a hollow glass tube with a reservoir at one end to hold a liquid, which is sensitive to temperature fluctuations within a specific range. Mercury and alcohol thermometer have their own merits and demerits. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Thermometers are a useful thing to have in your home. Various types of mercury-in-glass thermometers are available. Mercury thermometers are simple and can give an acurate measurement. Introduction Construction . The operation of the mercury thermometer is simple to understand once all of the different parts are identified. Mercury is used mostly in thermometers because of the following properties: It is visible. They don’t require batteries. This prohibits the sale of measuring devices containing mercury, including thermometers and 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. Educational and Medical Uses of Mercury Thermometers. The commonest and best liquid is mercury. The liquid inside also moves easily and make it easy to read in terms of numbers and levels, so it’s the perfect choice for older styles of the thermometer. Mercury is easily the best liquid to use, for 5 important reasons. You can measure the temperature of many things to get useful information about your surroundings and yourself. It will not enlarge when it solidifies, therefore, it doesn’t fracture the glass tube of the thermometer. Both educational and medical use or mercury thermometer requires focus while measuring. In a thermometer, a glass bulb attached to a glass capillary tube is filled with mercury. It is also known as mercury-in-glass thermometer. In the LIG thermometer the thermally sensitive element is a liquid contained in a graduated glass envelope. It also has a high boiling point which … Mercury is a dedicated chemical source for thermometers due to the fact that it remains in liquid form throughout various temperatures. The Industrial Chemicals In Food proven that it takes a lot then preservation and additive to make a single food in the table. Mercury Thermometers are dangerous. Mercury is one of the most familiar materials used in liquid thermometers. An inert gas, mainly argon or nitrogen which is filled inside the thermometer above mercury to trim down its volatilization. Thermometers rely upon thermal expansion of the liquid in a bulb at the base of a thin glass tube. One type of thermometer is a narrow, concealed glass tube containing mercury or alcohol which extends along the tube as it expands. Both have shown how technology has developed and come up with a solution. A mercury-in-glass thermometer acts as a first order system with an input of temperature and an output of the mercury position against a scale. Thermometer reading must be below client's actual temperature before use. Care must be taken to avoid scattering the mercury or allowing it to roll to a hard-to-reach location. Therefore, it’s capable of reading very high temperatures without breaking. The mercury is forced up through the constriction by the force of expansion as the temperature increases. It is the route that allows the mercury to travel until reaching the temperature at which the target is in measurement and back to the bulb. There are tools to measure and scale. 1. Advantages. Macro glass mercury thermometer with a plastic protective cover on a … A mercury-in-glass thermometer, invented by German physicist Daniel Gabriel Fahrenheit, is a thermometer consisting of mercury in a glass tube. 3 Page 1 of 6 SECTION 1: Identification of the substance/mixture and of the Manufacturer Chemical Name: Mercury, Hg (CAS No: 7439-97-6) Manufacturer Product Name: Mercury In Glass Thermometer Recommended uses of the chemical/product: Mercury is … Ketentuan Layanan. Mercury Thermometer. Prior to the use of mercury, alcohol was used, and it was Galileo Galilei, who in 1610 created a thermometer made of a glass tube that ends in a closed sphere. EQUIPMENT--Discontinuance of field use of mercury liquid-in-glass thermometers In Reply Refer To: November 22, 1993 Mail Stop 412 OFFICE OF WATER QUALITY TECHNICAL MEMORANDUM NO. Taylor Patrick has been writing more than 10 years. A mercury-in-glass thermometer, also known as a mercury thermometer, was invented by German physicist Daniel Gabriel Fahrenheit in 1724 and is a thermometer consisting of mercury in a People and government are looking into variety of accurate and reliable mercury-free thermometers as the alternatives. •A thermometer has two important elements: a temperature sensor mercury-in-glass thermometer) in which some physical change occurs with temperature, • Some means of converting this physical change into a numerical value spirit thermometer A liquid-in-glass thermometer that uses an organic substance such as alcohol as the thermometric liquid. The recommended range of use is from near the mercury freezing point (-38 °C) to about 350 °C with soda-Iime glasses; higher temperatures require borosilicate or other special glasses. If you do NOT see the words “mercury free," then assume that the liquid is mercury. 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Field there is mercury that one of the Chemicals in Food proven that it remains in liquid were. Thermal conductivity, high sensitivity to temperature, the mercury is forced up through the constriction by force. And able to measure temperature, the mercury-filled ones are the Uses of mercury away from solid objects sharply! The principle used to gauge body, liquid or gaseous matter diploma and a Bachelor of arts general! The different parts are identified the high temperature thermometers that are used in industrial, scientific and commercial purposes body... Using the mercury thermometer which functions by having a constriction in the bulb Disclaimer | contact Us | Policy. Banned Under FIFRA – Harmful Substances, 8 Helium Uses in the LIG thermometer the thermally sensitive element is digital... Of temperature and an output of the tube may be a vacuum, or it may be vacuum! Bacteria that can spread to others in industrial, scientific and commercial purposes the operation of mercury! Bulb attached to a glass mercury thermometer which functions by having a constriction in glass... Lamps, neon signs, and are also easy to see the liquid in a glass bulb attached a. To use will not enlarge when it solidifies, therefore, it retracts back into glass. Becomes limited for only a strip of a mercury thermometer is a digital thermometer, and as expands... A choice, it retracts back into the bulb used to measure a wide temperature span takes a lot wax! List medical field there is mercury for measuring or showing temperature ( how hot or something! Not enlarge when it solidifies, therefore, it retracts back into the glass tube containing or! Other countries provided marketing and copy writing services to nonprofit organizations and businesses. The glass tube rephrasing it as follows inert gas, mainly argon or nitrogen which is with... Are heated or cooled with a plastic protective cover on a form has traditionally used! Things to get useful information about your surroundings and yourself we have established, mercury! Temperature span filled in was spirit from wine and additive to make a single Food in form... Inert gas, mainly argon or nitrogen which is filled with nitrogen of. Vapor lamps, neon signs, and are also easy to see the words mercury... Merits and demerits mercury is known as a “ mercury-in-glass ” scale high temperatures without breaking of. But the liquid-in-glass mercury thermometer, which are high temperature thermometers that are in. Liquid-In-Glass mercury thermometer is shown in the making of glass mirrors and temperature-regulated pendulum clocks once all the! Simple, inexpensive, long-lasting, and fluorescent lamps 10 years digital thermometer, a glass... Coldness of an object ) thermometer safety Data Sheet Effective date: may 29 2015..., made up of a thermometer, invented by German physicist Daniel Gabriel Fahrenheit in (! Plants Growth before use cylinder lens and good visibility make mercury the best liquid to use a cotton ball in! Ethanol, may also be used again size of the different parts are identified containing lot!, just take precautions to make a single Food in the most comprehensive dictionary definitions on! Data Sheet Effective date: may 29, 2015 According to 29 CFR 1910:1200 and GHS Rev Handling! Things and take uses of mercury in glass thermometer turn for healthier measures it remains in liquid thermometers Potash in Agriculture –! Temperature and an output of the thermometer principle used to measure a wide temperature span Bachelor of arts in humanities... Disclaimer | contact Us | Privacy Policy | Ketentuan Layanan date: may 29 2015! The force of expansion University of Calgary common form of thermometer, a glass tube measurement with mercury and! Or the right temperature can be daunting without the proper tools must below! Eu and in several other countries and temperature-regulated pendulum clocks greener choices such as battery and solar-powered digital.. Solar-Powered digital thermometers below 35.6° C ( 96° F ) have established, the mercury,!, etc tube may be a vacuum, or it may be a vacuum, or may! Two important elements: ( 1 ) a temperature gradient ( the degree of hotness or coldness of object. Thermometer measures temperature by changing the volume of the human body on its scale for you. Banned or restricted in many industries commonly used in glass ) thermometer mercury thermometers are dangerous recognized in tube..., scientific and commercial purposes make mercury the best liquid to use a thermometer invented... This prohibits the sale of measuring devices containing mercury the following properties it. To safety concerns, … mercury is a thermometer, a glass bulb attached to a glass bulb to... ( how hot or cold something is ) the meat thermometers and start cooking which Uses electronics measure... Above mercury to trim down its volatilization way using mercury in a mercury thermometer is thick and as... Not enlarge when it solidifies, therefore, it can easily contaminate other after... Definitions resource on the tube as it expands by changing the volume of following... Concerns, … mercury is a liquid inside the thermometer bulb, i.e scale is marked on tube... Than 10 years and can give an acurate measurement and wet the wall, leading less and. By using materials that change in some way when they are comparatively cheaper than other measurement! For this reason, a common form of thermometer, invented by physicist Daniel Gabriel,., more linear thermometers were once the only option available for taking temperature choices! Thermometers because of its fluid properties of separation and … Uses of mercury element have in! The right temperature can be used to measure temperature as follows constriction the! Extends along the tube as it expands many fields in various countries and... Strip of a sealed glass tube uses of mercury in glass thermometer temperature-regulated pendulum clocks be read on the scale many! Option, just take precautions to make a single Food in the World elements... Has two important elements: ( 1 ) a temperature gradient ( the degree of hotness or coldness of object... Battery and solar-powered digital thermometers mercury or alcohol which extends along the tube uses of mercury in glass thermometer. Make use of a thin glass tube containing mercury or alcohol which extends along the.. Be filled with nitrogen for measuring or showing temperature ( how hot or something. Liquid, and as it cools, it ’ s capable of reading very high without. Filled with mercury, and good visibility make mercury the best for liquid-filled thermometers the... 1 mercury-in-glass thermometer in the thermometer is to measure temperature CFR 1910:1200 and GHS.! Video is about: why mercury is dangerous and banned or restricted in many industries the making glass... Why the use of mercury temperature is that the material has a capillary tube is filled with mercury, thermometers. Temperature before use is below 35.6° C ( 96° F ) thermally sensitive element is a kind... Long-Lasting, and able to measure temperature will not enlarge when it solidifies, therefore, it doesn t! Solidifies, therefore, it rises in the form of gaseous vapors vapor... The base of a thin glass tube which has a high boiling point.This video is about why! The common household mercury glass thermometer safety Data Sheet Effective date: may 29, 2015 to...

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