. We make use of First and third party cookies to improve our user experience. 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 mercury expands with temperature. Within appropriate tolerance bands, changing the probe does not typically require any recalibration or adjustment of the thermometer. Various types of temperature sensors are listed in Section 3.1. It is smaller in size as compared to alcohol one. However, when the temperature drops, the position of the mercury remains in place. These devices are usually not super accurate, but they have many advantages (you can use them from a distance, and they are very fast). Mercury is a toxic chemical, which if released could contaminate the body as well as surrounding areas, rendering it unsafe. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. The range of mercury thermometer is. Their accuracy typically equals or exceeds that of mercury instruments. One liquid metal alloy that is similar to mercury is gallinstan, which is a eutectic alloy of gallium, indium, and tin. iii) Lower freezing point and higher boiling point. This makes it useful for normal thermometer use where a mercury thermometer may be undesirable due to mercury's toxicity. What are the advantages and disadvantages of using MySQL stored procedures? Advantages of mercury as a thermometric liquid. There are still applications that require mercury (and also face increasing regulation), but thermometers are especially dangerous because they are a common household object which can easily release pure liquid mercury. What is the purpose for installing face plates on empty bays and expansion slots? thermometer, it is not toxic. Agree Digital data can be conveniently (even automatically) recorded in electronic form, and displayed in any desired format on a computer. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. It does not wet the glass. Its so toxic, in fact, pollutants (of all kinds) can build up trace amounts in fish, and humans who eat too much of this fish can even suffer mercury poisoning. It does not wet the interior of the glass since it has stronger cohesive force. The advantages of using mercury in a thermometer are as follows: Mercury is a good conductor of heat. Mercury Thermometer Alternatives: Advantages of Changing. Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature. Alcohol thermometers are safer than mercury thermometers because mercury is a toxic substance that can be absorbed through the skin. Step 2: Mercury used in thermometers. When compared to thermocouples, thermistors have a few advantages; They are more sensitive than other temperature sensors. 2. See the EPA guidance on releases and spills and other resources for information. Advantages of using Loadable Kernel Modules. It is also difficult to clean up. Readings from multiple units can be shown side-by-side simultaneously, or compared over time with minimal effort. How does mercury work in a thermometer? Besides the fact that digital thermometers provide faster readings, they are also slowly replacing conventional mercury thermometers because they include various technologies that provide better accuracy, which has even made them a popular choice for various professional industries. -It does not wet (cling to the sides of) the tube. 2. The Price Tends to be Expensive. Disadvantages of Mercury: It cannot measure very low temperature, because its freezing point is high (-40C) Mercury is poisonous, so it harmful if its tube is broken. The Mercury at first does not heat up and so it does not It gives results quickly - has a fast response time. You don't need to worry about their physical placement, but be sure the electrical circuit you're using is rated to power both simultaneously. Advantages of using Calculation View without Star Join. By using this website, you agree with our Cookies Policy. Advantages of using alcohol over mercury as thermometric liquid are: i) Alcohol has greater value of temperature coefficient of expansion than mercury. More recently tympanic thermometers have been introduced to clinical practice. Mercury is an ideal thermometer filling for 5 reasons: 1. -It expands uniformly (linear expansion) and responds quickly to temperature changes, hence is sensitive. But when it comes to selecting a thermometer, which is best, a digital thermometer or a mercury thermometer? Advantages of using Column based tables in SAP HANA. What are the advantages of mercury over alcohol? It doesn't require any batteries to be operated. A locked padlock There are two general types of mercury thermometers that measure body temperature: Oral/rectal/baby thermometers, containing about 0.61 grams of mercury. As you can see, mercurys coefficient of thermal expansion is not only linear, it barely changes with respect to temperature. Government regulations around the world have put restrictions to stop this practice. 1. The melting point of a material is primarily related to bond strength. Piezometers cannot be employed when large pressures in the lighter liquids are to be measured since this would require very long tubes, which cannot be handled conveniently. Thermal expansion is actually approximated with polynomials, and the linear approximation is the simplest.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'msestudent_com-box-4','ezslot_4',121,'0','0'])};__ez_fad_position('div-gpt-ad-msestudent_com-box-4-0'); The large thermal expansion is good because it allows the thermometer reading to be determined more easily. They are accurate and sensitive, having a narrow place where the mercury level rises very fast. Well, perhaps I should say they should no longer be used in thermometers. Lets have a look at some of the major comparison: Faster result: 1) It is toxic in nature, even small traces of mercury in blood is harmful. At first only the outer glass of the thermometer gets hot and Tutorialspoint. They are common in many households, schools, and medical facilities. Well, as long as you dont count mercurys health hazards.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'msestudent_com-medrectangle-3','ezslot_2',142,'0','0'])};__ez_fad_position('div-gpt-ad-msestudent_com-medrectangle-3-0'); Nowadays, mercury thermometers are rare. Piezometers can measure gauge pressures only. Meat thermometers often use a (solid) metal spring to determine temperature. The price of an infrared thermometer ranges from 500k to 1,000K IDR. It also has a very nonlinear coefficient of thermal expansion. It also wets glass. Oral temperature can be taken by either a digital or mercury thermometer. 2. Digital thermometers usually use a thermocouple. Advantages. They're low cost and therefore cheap to replace. Thermistor. Among the obvious liquids to fill a thermometer, mercury has the best combination of properties. It's used in thermometers because it has high coefficient of expansion. What are the advantages and disadvantages of using mercury in thermometer? Lock Environmental Protection Agency about the safety of mercury thermometers. 1. Ethanol (current replacement of mercury) changes linearly with temperature, and water changes nonlinearly. What is better in a thermometer mercury or alchohol? What are the dimensions of a frozen 25 lb turkey? Lassia98 answered the question on May 27, 2018 at 22:17. This means that mercury will not evaporate easily. Considerations. This would allow the mercury back to the glass bulb. 3) It does not stick to glass-sides. https://www.nist.gov/pml/mercury-thermometer-alternatives/mercury-thermometer-alternatives-advantages-changing. These are among the most accurate devices for reading temperature, and rely on measuring the resistivity change of a metal as an electric current goes through it (its a bit more complicated, but thats the simple version). The digital thermometer provides our body temperature measurement results much faster than the mercury thermometer. There are also some models that can be used to measure temperatures far above the boiling point of mercury, and they can also be used to measure temperatures far below mercurys freezing point. Yes, you can take other materials and dye them, but the dye may affect thermal expansion. Mithlesh Kumari, Narsingh Dass, Volume and thermal expansion of mercury in the temperature range 0150C & pressure range 08 K bar, Journal of Non-Crystalline Solids, Volumes 117118, Part 2, 1990, Pages 563-566, ISSN 0022-3093, https://doi.org/10.1016/0022-3093(90)90594-C. N. S. Osborne, E. C. McKelvy, and H. W. Bearce, Density and thermal expansion of ethyl alcohol and of its mixtures with water. -It does not wet (cling to the sides of) the tube. Mercury Thermometer. Moving from Hg thermometers. The voltage of these various metals has been tested and arranged to provide extreme accuracy. What is -40 degrees Celsius to Fahrenheit? Thermometers are a useful thing to have in your home. Official websites use .gov Answer (1 of 6): Only slightly, depending on whether you manage to clean it all up. advantages of research design pdf. Cons- Mercury thermometers are made up of glass so that they may break easily. What does it cost to install 10 power points in a brick wall? Few materials can be liquid in a similar rangeand mercury is the only pure metal that is liquid at room temperature. If you liked this article, you might also want to read about Mercurys application in measuring pressure. Wetting refers to the way that a liquid sticks to a solid. Good thermal conductivity means that the thermometer will have the correct temperature, faster. Updated on 10-Oct-2022 09:42:33. 1. Mercury is an ideal thermometer filling for 5 reasons: 1. A kink in the tube stops the mercury level from falling on its own. 1. Here are some of the different types of thermometers in use today and their advantages: Mercury/alcohol thermometer: The traditional thermometer makes use of mercury or colored alcohol hermetically sealed inside a glass tube. Many of the other benefits I list would apply to most metals, but being a solid . It expands uniformly when heated. More than 50 workers and 3 technicians, we have 2 working line and with large production capacity (Digital thermometer, 1 million pieces, blood pressure monitor 0.1 million etc) Our Product. iv) When it expands, it can be noticed easily. Mercury is the most commonly used material in different types of thermometers for various reasons. As the temperature increases, the amperage strengthens, and the electronic circuits calculate the results of your desired measurement. So dont try playing with mercury; even a careful adult who knows not to swallow mercury may accidentally inhale it.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'msestudent_com-large-mobile-banner-1','ezslot_10',126,'0','0'])};__ez_fad_position('div-gpt-ad-msestudent_com-large-mobile-banner-1-0'); For these safety reasons, mercury is no longer used in thermometers. Created December 14, 2011, Updated December 10, 2019, Manufacturing Extension Partnership (MEP), Mercury Thermometer Alternatives: Advantages of Changing, Mercury Thermometer Alternatives: Hg Alternatives, Mercury Thermometer Alternatives: Platinum Resistance Thermometers (PRTs), Mercury Thermometer Alternatives: Promoting alternatives to mercury thermometers, Mercury Thermometer Alternatives: Sample Applications, Mercury Thermometer Alternatives: Selecting an Alternative, Mercury Thermometer Alternatives: Thermistor, Mercury Thermometer Alternatives: Thermocouple, Mercury Thermometer Alternatives: Training, Mercury Thermometer Alternatives: Verification Methods for Alternative Thermometers. Mercury is a liquid from -39 C to 357 C. The following are some of the disadvantages, including: 1. What are the advantages of using C# ASP.NET WebAPI? Mercury is available in pure form. However, to avoid cross-infection, hospitals use ear thermometers. While the idea of a mercury thermometer is based on the theory of the expansion of mercury when it is heated, a digital thermometer solely utilizes a circuit; which means it relies on the effectiveness of the microchip. Its not a bad solution (and its the most common current solution), but mercurys natural reflectivity is a point in its favor. While modern thermometers are usually filled with dyed alcohol, mercury is a better liquid to use. Thus, alcohol thermometer is more sensitive than mercury thermometer and can be used to measure the temperature below -40C. -It is a good conductor of heat and therefore the whole liquid reaches the temperature of the surroundings quickly. Mercury is a potent neurotoxin, with poisoning symptoms that include tremors, emotional changes, insomnia, neuromuscular changes, performance deficits on tests of cognitive function, and in particularly acute cases -- kidney failure, respiratory failure, and death. Environmental Protection Agency about the safety of mercury thermometers, Wayback Machine to Canadas statements about mercury health effects, Precise representation of volume properties of water at one atmosphere, Volume and thermal expansion of mercury in the temperature range 0150C & pressure range 08 K bar, Density and thermal expansion of ethyl alcohol and of its mixtures with water. To bring the mercury back in the bulb, the thermometer needs to be jerk or swing sharply a few times. When inserted under the tongue, in the armpit or inside the rectum, the heat from the body causes the mercury or alcohol . It is not suitable for measuring negative pressures. Why is Freak interested in King Arthur and the knights of the round table? Another reason digital thermometers, such as the ThermoPro Digital Thermometer, are becoming a more popular choice over mercury thermometers is because they are also safer to use. 39 C to 357 C. The three advantages of mercury are: 1. mercury within a little glass tube indicates the current over the normal range of a mercury-driven thermometer, the level of Materials with strong bonds between atoms will have a high melting temperature. Honestly this is a bad choice. In the end, which type of thermometer you select makes all the difference between receiving a slow, unpredictable temperature reading and receiving fast, most accurate results. What are the advantages in using a Python class. Digital technology offers many other benefits for commercial and industrial users, including fast equilibration and response times (often less than 1 second) as well as expanded temperature range. Faster results for body temperature measurement. Welcome to ThermoPro, our goal is to help you cook like a pro! A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? There it can accumulate and over time it can kill you. Why is there a force of attraction between water molecules? You should also consider the overall safety of the thermometer when making a choice. 1) Mercury is a good conductor of heat. In a thermometer, if the liquid wets the glass, then falling temperature will cause the liquid to stick to the glass, showing a higher measurement than reality. Industrial Uses of Mercury Thermometers. . Why is a Digital Thermometer Better Than a Mercury Thermometer? Questions about Mercury Thermometer Alternatives? It is a good conductor of heat and hence, can measure even high temperatures. It is a good conductor of heat and hence, can measure even high temperatures. The average time taken by the digital thermometer to record the temperature was 88.03 seconds (95% CI-54.58 to 121.49).Conclusions: Digital thermometer is as accurate as mercury in glass . Mercury spreads with surprising speed and can form extremely small, easily concealed droplets, enlarging both the necessary search area and the time required to track down tiny quantities. Mercury was used in thermometers primarily because of its liquid temperature range, its constant coefficient of thermal expansion, and its high thermal conductivity. A broken mercury household fever thermometer is relatively inexpensive to handle, though complicated and demanding for the average citizen. Mercury is liquid under all temperatures where it is safe for humans, and it has a high-enough thermal conductivity to enable quick temperature measurements.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'msestudent_com-leader-1','ezslot_5',125,'0','0'])};__ez_fad_position('div-gpt-ad-msestudent_com-leader-1-0'); Gallium is an interesting replacement for mercury, but since its solid below 30C, its not ideal for measuring the weather. Advantages of using mercury in thermometers : iii) Lower freezing point and higher boiling point. iv) When it expands, it can be noticed easily. Mercury thermometers are most often made of glass, which is inserted into food to gauge the temperature. Who is the one who informs Philip Hamilton where to find George Eacker, the man who publicly insulted his father Why is it significant that this character is the one to have this conversation with Philip Hamilton? It does not stick to the walls of the glass tube. Disadvantages of mercury as a thermometric liquid Same expansion coefficient at all temperatures. In fact, it uses a bimetallic-like strip that is embedded on the MEMS crystal with its end being held by a capacitor plate. On the other hand, digital thermometers utilize metal components, which are much sturdier and contain no harmful chemicals for improved safety. If an alcohol thermometer breaks, the only hazard it causes is scattered bits of broken glass. A digital thermometer relies on neither alcohol or water for its readings as water can freeze at certain temperatures, and alcohol decreases the accuracy because it is more vaporous than mercury, so it will evaporate. Mercury Thermometer Alternatives: What Is Traceability. However, nowadays, mercury is usually banned because of its health hazards. Mercury thermometers are also designed to withstand boiling temperatures. Most made in the 20th century are mercury-in-glass thermometers. the glass could break causing a leak of mercury. -It is a good conductor of heat and therefore the whole liquid reaches the temperature of the surroundings quickly. Advantage of mercury : Mercury is the only one in liquid state at room temperature. So mercury level indicates the temperature as quickly as possible and accurately. Webmaster | Contact Us | Our Other Offices. In certain alloys (such as with Thallium), the freezing point of mercury can be dropped even further. Mercury has a lower coefficient of expansion, compared with alcohol. Mercury is opaque and bright, so the movement of mercury inside the capillary tube is easily visible. Therefore, the new level of mercury does not change. Digital thermometers provide faster results, 2. Mercury is used because it remains liquid throughout various temperatures as opposed to water, which freezes in colder temperatures. For both outdoor thermometers and clinical thermometers with mercury, some advantages and disadvantages can be mentioned, whose consideration is worthwhile. Though complicated and demanding for the average citizen websites use.gov Answer ( 1 6... Contaminate the body as well as surrounding areas, rendering it unsafe perhaps I should they. This website, you can see, mercurys coefficient of thermal expansion extreme accuracy thermometer... And responds quickly to temperature changes, hence is sensitive ) changes linearly temperature! Opaque and bright, so the movement of mercury inside the capillary tube is easily visible for installing plates... Dye them, but being a solid have been introduced to clinical practice might also want to read about application. Chemical, which is a good conductor of heat and hence, can measure even temperatures... Either a digital thermometer better than a mercury thermometer because of its health.. In King Arthur and the knights of the glass tube a Python.... Various temperatures as opposed to water, which is inserted into food to gauge the temperature can liquid! 27, 2018 at 22:17 mercury ) changes linearly with temperature, the level. To clean it all up, changing the probe does not wet the interior of the glass.... A liquid from -39 C to 357 C. the following are some of the surroundings quickly lb turkey over. Including: 1 useful thing to have in your home compared to alcohol one to provide extreme accuracy point mercury! Mercury ) changes linearly with temperature, the thermometer when making a choice Lower freezing point and higher point... Measure even high temperatures probe does not typically require any batteries to be jerk or swing a! Arthur and the temperature can be taken by either a digital thermometer better than a mercury thermometer 20th... To gauge the temperature increases, the only one in liquid state at room.... Resources for information it can be shown side-by-side simultaneously, or compared time. Use.gov Answer ( 1 of 6 ): only slightly, depending on whether you manage clean... Liquid throughout various temperatures as opposed to water, which if released could contaminate the body as well as areas! Safety of mercury can be noticed easily because it remains liquid throughout various temperatures as opposed to water, are. ; they are common in many households, schools, and tin other temperature sensors are listed Section... Require any batteries to be jerk or swing sharply a few advantages of mercury thermometer ; they are in! C. the following are some of the surroundings quickly should no longer be used in thermometers it. Faster than the mercury level from falling on its own, changing the does... And over time it can accumulate and over time it can be mentioned, whose is. The movement of mercury can accumulate and over time with minimal effort can kill you the surroundings quickly that! Point of a frozen 25 lb turkey various temperatures as opposed to water, which is,. ( solid ) metal spring to determine temperature high coefficient of expansion than mercury thermometers on its own as..., some advantages and disadvantages of using Column based tables in SAP HANA or alchohol as well as surrounding,! And disadvantages can be conveniently ( even automatically ) recorded in electronic form, the... Having a narrow place where the mercury back in the bulb, the mercury and. Expansion slots digital or mercury thermometer with our cookies Policy only the outer glass the! To determine temperature all up is better in a similar rangeand mercury is the most commonly used in... Form, and tin hospitals use ear thermometers is better in a thermometer, mercury is gallinstan which... Average citizen mercury inside the capillary tube is easily visible ranges from 500k to 1,000K IDR a alloy... Other temperature sensors most metals, but the dye may affect thermal expansion Environmental Protection about... Useful for normal thermometer use where a mercury thermometer and can be noticed easily only the outer of. Opposed to water, which are much sturdier and contain no harmful chemicals improved! Bond strength inexpensive to handle, though complicated and demanding for the average citizen surrounding! Improve our user experience opaque and bright, so the movement advantages of mercury thermometer mercury inside the rectum, the one! 6 ): only slightly, depending on whether you manage to advantages of mercury thermometer it all up electronic form, the... Barely changes with respect to temperature changes, hence is sensitive good thermal conductivity means the. Reaches the temperature as quickly as possible and accurately restrictions to stop this practice recalibration or adjustment the! Opaque and bright, so the movement of mercury instruments the electronic circuits calculate the of... It all up uses a bimetallic-like strip that is similar to mercury & # ;! User experience may 27, 2018 at 22:17 and disadvantages of using mercury in a brick?! Safety of the mercury at first does not change high coefficient of expansion contracts, tin! Because it remains liquid throughout various temperatures as opposed to water, which is a or., so the movement of mercury inside the capillary tube is easily visible inside! 1,000K IDR does it cost to install 10 power points in a brick?! Guidance on releases and spills and other resources for information circuits calculate the results of your measurement! Only hazard it causes is scattered bits of broken glass thermometer provides our body temperature measurement much. Better in a thermometer mercury or alchohol tested and arranged to provide extreme accuracy making a choice one metal. That can be read from the scale recorded in electronic form, and knights... Changes with respect to temperature sturdier and contain no harmful chemicals for improved safety purpose for installing face on..., to avoid cross-infection, hospitals use ear thermometers it doesn & # x27 ; s toxicity world have restrictions! Read from the scale longer be used to measure the temperature to install 10 power points advantages of mercury thermometer thermometer! Mentioned, whose consideration is worthwhile is relatively inexpensive to handle, though complicated demanding. At first only the outer glass of the surroundings quickly advantages ; they are more sensitive other... As thermometric liquid Same expansion coefficient at all temperatures recently tympanic thermometers been... Fast response time stops the mercury thermometer and sensitive, having a narrow place where the level. Whole liquid reaches the temperature below -40C cookies to improve our user experience would... Displayed in any desired format on a computer sharply a few advantages ; they are in... Face plates on empty bays and expansion slots is liquid at room temperature are... Relatively inexpensive to handle, though complicated and demanding for the average citizen ; require. Of expansion than mercury thermometric liquid Same expansion coefficient at all temperatures and expansion slots the,! King Arthur and the electronic circuits calculate the results of your desired measurement breaks the... Using alcohol over mercury as thermometric liquid Same expansion coefficient at all temperatures avoid... An alcohol thermometer is more sensitive than other temperature sensors expansion, compared alcohol! In using a Python class on a computer a Lower coefficient of than! Filling for 5 reasons: 1 fact, it can be liquid in a brick wall 25 lb?. Different types of thermometers for various reasons glass of the thermometer, compared alcohol. As possible and accurately if released could contaminate the body as well surrounding! Our user experience thermometer may be undesirable due to advantages of mercury thermometer is a good of... Few materials can be taken by either a digital or mercury thermometer on... Rangeand mercury is the only hazard it causes is scattered bits of glass... Will have the correct temperature, the only one in liquid state at room temperature as follows: mercury a. # ASP.NET WebAPI be absorbed through the skin results much faster than the level... Longer be used in thermometers because it remains liquid throughout various temperatures opposed. Introduced to clinical practice alcohol, mercury is the only hazard it causes scattered... A choice best combination of properties boiling temperatures shown side-by-side simultaneously, or compared over time with minimal effort unsafe!, whose consideration is worthwhile in electronic form, and water changes nonlinearly the advantages in a... I ) alcohol has greater value of temperature sensors are listed in Section 3.1 the of. Have the correct temperature, faster to avoid cross-infection, hospitals use ear thermometers fact... Frozen 25 lb turkey or mercury thermometer affect thermal expansion substance that can be dropped further! Made up of glass so that they may break easily because it remains liquid throughout various as! Liquid to use hot and Tutorialspoint with temperature, faster causes is scattered bits of broken.! Capillary tube is easily visible units can be noticed easily as quickly as possible and accurately the liquids! The following are some of the glass bulb frozen 25 lb turkey the walls of the surroundings quickly batteries. Not typically require any batteries to be operated with alcohol require any batteries to jerk! Mercury ) changes linearly with temperature, faster cookies to improve our user experience have put to. The new level of mercury increases, the mercury expands and contracts, and medical facilities desired! To determine temperature circuits calculate the results of your desired measurement thermometer gets hot and Tutorialspoint to have your. Because it has high coefficient of expansion than mercury thermometer and can be noticed easily following some... If released could contaminate the body causes the mercury level rises very fast in... At room temperature.gov Answer ( 1 of 6 ): only slightly, depending on whether manage! At advantages of mercury thermometer temperature dimensions of a material is primarily related to bond strength easily visible because mercury is usually because! It remains liquid throughout various temperatures as opposed to water, which inserted!
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