The two liquids used in liquid in glass thermometers are mercury and alcohol. It has a greater value of temperature coefficient of expansion than a mercury thermometer. Macmillan and co, limited, 1920, Explaining Physics: GCSE Edition By Stephen Pople. 3. Liquid-in-Glass Thermometers. “Notions of English Disciple.” Comparison of Alcohol and Mercury Thermometer, Available here. 4. lower boiling point (60 0C) Range:-200 °C to 80°C, though range tends to be highly dependent on the type of alcohol used. What is the Difference Between Alcohol and Mercury Thermometers      – Comparison of Key Differences, Key Terms: Alcohol, Alcohol Thermometer, Mercury, Mercury Thermometer, Sensor, Temperature, Thermometer. In terms of the concepts of heat and electricity, please! Mercury Thermometers: Mercury thermometer use mercury, and it does not have to be added with a dye because mercury already has a silvery-color. 1. News » The Advantages and Disadvantages of Thermocouple Utilization : Monday, 26 August 2013. “Mercury-thermometer” By Jurii – (CC BY 3.0) via Commons Wikimedia 3. Home » Science » Chemistry » Analytical Chemistry » Difference Between Alcohol and Mercury Thermometers. Alexis Rohlin is a professional writer for various websites. Mercury Thermometers: Mercury thermometers are used to measure temperatures from −37 to 356 °C. A thermometer is a device that is used to measure the temperature. Due to alcohol's weak surface tension, the alcohol in the thermometer will evaporate. The temperature range is −80 to +330 °C depending on the liquid. It exerts low vapour pressure. The alcohol-in-glass thermometer is a cheaper and less dangerous alternative to the mercury-in-glass thermometers. It is less toxic and less hazardous. “SpiritTherm02” By Chemical Engineer – Own work, Public Domain) via Commons Wikimedia 2. Following are the major advantages associated with the use of liquid-in-glass thermometers: 1. They employ alcohol as the filled in liquid in glass tubes. Alcohol Thermometers: Alcohol thermometer is suitable for measurement of low temperatures. Disadvantages: Alcohol is … Oxford University Press, 1987. 2. The bulb is connected to a sealed capillary tube which is filled with a mixture of nitrogen gas and the vapor of the alcohol. So, we will see them as advantages and also as disadvantages. Advantages of Alcohol Thermometer. It works on exactly the same principle as the mercury-based device but has a few advantages. This capillary tube is made of the same glass used to make the bulb, and it is inside a glass tube which has the temperature scale marked on. set up when the junction of two dissimilar metals is heated. People who prefer it believe that advantages of alcohol … The visible sale is often a glass tube marked with a temperature range. Unlike the mercury-in-glass thermometer, the contents of an alcohol thermometer are less toxic and will evaporate quickly. Some believe that non-mercury thermometers should not be used in secondary schools bec… Mercury thermometer is a type of thermometer that uses a bulb filled with mercury as the temperature sensor. If the top is cooler than the bottom, the alcohol will distil and condensate on the walls, which can cause an inaccurate reading. alcohol - cheaper, less chance of pollution, safer for people to use, less accuracy, harder to read in some cases. What are Mercury Thermometers      – Definition, Mode of Action, Advantages, Disadvantages 3. They can pick up hot spots in electrical systems and bearings and help monitor cooling systems. ADVANTAGES: 1. Alcohol Thermometers: Alcohol thermometers are used to measure temperatures from -115°C to78.5°C. Alcohol Thermometers: Alcohol thermometer wall get wet by alcohol. Mercury Thermometers: Mercury is highly toxic. Due to alcohol's weak surface tension, the alcohol in the thermometer will evaporate. They can be frequently applied in areas where there is problem of electricity. An alcohol thermometer is a commonplace item for many households. Unlike electrical thermometers, they do not necessitate power supply or batteries for charging. Digital Thermometer can accurately the temperature decide and measure, digital display, not a pointer or mercury display. The ethanol version is the most widely used due to the low cost and relatively low hazard posed by the liquid in case of breakage. 3. Below −37°C, mercury is a soli. M.B. Mercury Thermometers: Mercury thermometer is suitable for measurement of high temperatures. It has low specific hest capacity. The main difference between alcohol and mercury thermometer is that the bulb of mercury thermometer is filled with mercury whereas the bulb of alcohol thermometer is filled with alcohol. 6. Alcohol Thermometers: Liquid inside the bulb of alcohol thermometer can be pure alcohol, toluene, kerosene, etc. Condensation. Alcohol thermometer (compared to a mercury thermometer) lower freezing point (-114 ºC) less durable (alcohol evaporates) larger coefficient of expansion. It is less toxic than mercury thermometer and hence high on safety factor for human and environment. Thermocouples use the e.m.f. If not, the rise of the meniscus cannot be seen clearly. When the dyed alcohol rises upward the capillary tube, the position of the meniscus can be clearly located. Madhusha is a BSc (Hons) graduate in the field of Biological Sciences and is currently pursuing for her Masters in Industrial and Environmental Chemistry. When these thermometers are placed in warm solutions, they can measure the temperature of that solution using the expansion of the liquid inside the bulb through the capillary tube. Answer (1 of 1): It is cheap, portable and convenient. Alcohol thermometers are used in the place of mercury thermometers considering the safety of the chemical compound. Alcohol Thermometers: Alcohol thermometer is a type of thermometer that uses a bulb filled with alcohol as the temperature sensor. There are some advantages of resistance temperature detector (RTD) which are given below. * Temperature Range: High-temperature range compared to the alcohol thermometers is another advantage of the mercury types. If an alcohol thermometer breaks, the only hazard it causes is scattered bits of broken glass. Mercury does not wet the capillary tub wall, Hazardous if the bulb is broken and mercury leaks out. It is less durable because alcohol evaporates quickly. Liquid-in-glass thermometers measure the thermal expansion of a liquid, which is placed in a solid container, on a length scale. Mercury Thermometers: Mercury thermometer is a type of thermometer that uses a bulb filled with mercury as the temperature sensor. They are handy and convenient to use. They provide very good repeatability and their calibration remains unaffected. The liquid should be dyed before filling the bulb. Mercury Thermometers: Liquid inside the bulb of mercury thermometer is Mercury. less hazardous. 2. They are comparatively cheaper than other temperature measurement devices. When you are using an alcohol thermometer in warm water, you have to keep the top part of the thermometer warm as well. The alcohol­­glass thermometer: As a liquid it utilises ethyl alcohol, toluene and technical pentane. When the volume of alcohol expands, the liquid enters the capillary tube and rises. The major disadvantage of alcohol thermometers is the limited use at very high temperatures as in cooking, because of the low boiling point of the thermometer’s liquid contents. "Same laboratory thermometers use alcohol instead of mercury. Why is a thermometer, alcohol or mercury, usually shaken before used?" It is suitable to measure low temperatures because of its freezing point is low. The temperature range that can be measured by a typical mercury thermometer is −37 to 356 °C. It gives more accurate readings. The temperature measurement range of alcohol thermometers varies from 115°C to 785°C, where former is the freezing temperature point of alcohol and latter is boiling temperature point of alcohol. Alcohol has a low surface tension and does not react quickly to temperature changes, nor is it a good conductor of heat. What are the advantages and disadvantages of using alcohol in thermometers. It can measure low temperatures. Advantages of mercury as a thermometric liquid.-It is a good conductor of heat and therefore the whole liquid reaches the temperature of the surroundings quickly. Unlike mercury in the mercury thermometer, alcohol is less toxic and evaporates quickly. of 357 degree C. 7. Since alcohols are colorless, they are dyed before filling the bulb. It really depends on what you need to determine the … A mercury-in-glass thermometer has a range of -39oC to 360oC while an alcohol-in-glass thermometer has a range of -112o C to 78o C. Noah Borel Here are some advantages and disadvantages of mercury-in-glass thermometers: The position of the meniscus of the mercury on the temperature scale gives the temperature of the sample. The maximum temperature that can be measured depends on the boiling point of the liquid inside the bulb. Alcohol Thermometers: Alcohol thermometer uses alcohols colored with a dye. Difference Between Alcohol and Mercury Thermometers, What is the Difference Between Alcohol and Mercury Thermometers. “Mercury-in-Glass thermometer.” Wikipedia, Wikimedia Foundation, 12 Dec. 2017, Available here. Below are some of the advantages and disadvantages associated with thermometric liquids.Advantages of mercury as a thermometric liquid.-It is a good conductor of heat and therefore the whole liquid reaches the temperature of the surroundings quickly.-It does not wet (cling to the sides of) the tube.-It has a high … When the bulb is immersed in the sample in which the temperature should be measured, the mercury rises up the capillary tube due to the expansion of the volume as a response to the change in temperature. A mercury-in-glass thermometer has a range of -39oC to 360oC while an alcohol-in-glass thermometer has a range of -112o C to 78o C. Noah Borel Here are some advantages and disadvantages of mercury-in-glass thermometers: lower boiling point (60 ºC) Bimetallic thermometer * cheap. Mercury Thermometers: Mercury thermometers are highly durable because Mercury does not evaporate easily. Alcohol has a low surface tension and does not react quickly to temperature changes, nor is it a good conductor of heat. less hazardous. The optical pyrometer is not useful for measuring the temperature of clean burning gases that do not radiate visible energy. It is also known as mercury-in-glass thermometer. Disadvantages of Alcohol Thermometer. Some thermometers use a bulb filled with a chemical such as mercury as the temperature sensor. Mercury Thermometers: Mercury thermometer wall does not get wet by Mercury. The position of the meniscus of the liquid is read using the temperature scale marked on the glass tube. “Alcohol thermometer.” Wikipedia, Wikimedia Foundation, 22 Nov. 2017, Available here. It has a high b.p. Alcohol thermometers are safer than mercury thermometers because mercury is a toxic substance that can be absorbed through the skin. Her interest areas for writing and research include Biochemistry and Environmental Chemistry. fluid loss by evaporation hard to avoid . VI ADVANTAGES OF INFRARED THERMOMETERS. Therefore, it cannot be used in places with high temperatures. First of all, it is not poisonous, and as a result, much safer to use than mercury. The accuracy of RTD is good. Etymologically, the thermometer is a device used to measure the temperature appropiate and express it by a number. The word thermometer comes from the word thermos meaning warm and meter meaning measuring device. 3. Temperature compensation is not necessary. Alcohol Thermometers can leak easily and wet the wall, leading less accurate and slow readings. Alcohol Thermometers: Alcohol thermometers are less durable because alcohol evaporates quickly. Kirkham, in Principles of Soil and Plant Water Relations, 2005. Due to these downsides of alcohol thermometers, some secondary schools don’t use them for educational purposes. Mercury Thermometer Vs. Alcohol Thermometer, University of Wyoming: A thermometer comparison, Sea Friends: Measuring temperature how temperatures are measured. alcohol can polymerise. This physical property also makes alcohol prone to vaporisation, making it less reliable to use than mercury in a thermometer. The capillary tube is located inside a glass tube on which the temperature values are marked on. Rohlin holds a Bachelor of Fine Arts in English from Madonna University. If the top is cooler than the bottom, the alcohol will distil and condensate on the walls, which can cause an inaccurate reading. alcohol ­in ­glass thermometer: As a liquid it utilises ethyl alcohol, toluene and technical pentane, which can be used down to -200 °C. IR thermometers are handy for use in measuring drafts and insulation breakdown. It is easily available in pure state. The most commonly used colors as dye are blue or red. Difference Between Normal Phase and Reverse Phase... What is the Difference Between HPLC and HPTLC, What is the Difference Between Comet and Meteor, What is the Difference Between Bacon and Ham, What is the Difference Between Asteroid and Meteorite, What is the Difference Between Seltzer and Club Soda, What is the Difference Between Soda Water and Sparkling Water, What is the Difference Between Corduroy and Velvet. But some thermometers also use digital sensors. Alcohol Thermometer Advantages and Disadvantages Advantages. An alcohol thermometer has a few advantages and disadvantages when compared to a Mercury thermometer. In temperature measurement, the thermocouple term is commonly found. This loss of fluid cannot be avoided. This can make the thermometer show the results more slowly and less accurately. The accuracy may be affected by dust, smoke and thermal background radiation. The boiling point of mercury is 356.7 °C, hence the maximum temperature that can be read from a mercury thermometer is 356 °C. A thermometer is composed of two components: a sensor to detect temperature, and a visible scale to get the numerical value for the temperature measured. It does not stick to glass-sides. It cannot measure high temperatures than the boiling point of the liquid inside the bulb. alcohol can polymerise. Alcohol thermometer (compared to a mercury thermometer) lower freezing point (-114 0C) less durable (alcohol evaporates) larger coefficient of expansion. Sometimes, it is a digital readout. Alcohol thermometer and mercury thermometer are two types of thermometers which are composed of a bulb and a marked glass tube. The liquid inside the bulb can be pure ethanol, toluene, kerosene or any other suitable component depending on the application. Range c. -200 Advantages: °C to 80°C, though range tends to be highly dependent on the type of alcohol used. Thermister-based or “metal thermometers” are recommended in these applications, which do not utilize any liquid for temperature measurement. If the cold junction is kept at a constant known temperature, the galva… It measures the temperature precisely. Advantages: It can measure very low temperatures. For instance, an alcohol thermometer cannot be used to determine the temperature of steam because the high heat required to change water from a liquid to a gas (steam) would also cause the alcohol to boil and evaporate. But the maximum temperature measured by an alcohol thermometer is 78.5°C; hence this thermometer is suitable for measuring lower temperatures. The disadvantages includes, it is fragile and the fluid contained inside the tube may be toxic. The liquids are used as a thermometer filler, because the liquids undergo the change in … Alcohol has a low surface tension and does not react quickly to temperature changes, nor is it a good conductor of heat. On the surface of the glass tube, temperature scale is marked in order to get the value for a particular temperature. She has produced works for Red Anvil Publishing and was one of the top 10 finalists in the 2007 Midnight Hour Short Story Contest for OnceWritten.com. Alcohol thermometer is a type of thermometer that uses a bulb filled with alcohol as the temperature sensor. November 13, 2020 by . The space of the capillary tube (above mercury) is filled with nitrogen gas. Advantages of alcohol consumption: Many of them consume alcohol but few people are critical about its use.But some of them are in dilemma about its use. It cannot record temperature automatically or electronically. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Thermocouple is mainly used in thermometer as the sensor of temperature measurement. fluid loss by evaporation hard to avoid . Thermometer is commonly made of a glass tube which is filled with liquids. 4. The expansion of alcohol is regular. Answer (1 of 4): The two liquids used in liquid in glass thermometers are mercury and alcohol. The capillary wall gets wet by They both have advantages and disadvantages: A mercury-in-glass thermometer can measure high temperature (up to 357 0C, the boiling point of mercury; and its freezing point is -39 0C). Advantages and disadvantages of resistance temperature detector (RTD) Author: Technical Editor Category: Electronics Articles 8 Jul 17. DISADVANTAGES: 1. 5. Alcohol thermometers are used to measure temperatures from -115°C to78.5°C. The higher temperature junction is usually called the ‘hot junction’ and the lower temperature junction the ‘cold junction’. Therefore, this thermometer is not suitable for such low temperatures. Let’s say you’ve heard a lot about infrared thermometers and are considering purchasing one. The mercury thermometer is one example of liquid thermometers. Alcohol is also used with this type of instrument. Alcohol thermometers are replacing mercury thermometers in many applications. 2. It is opaque n shining. “Rtuťový teploměr; Mediacal mercury-in-glass thermometer” by Da Sal (CC BY 2.0) via Flickr. But if the capillary tube is filled with nitrogen gas, then the temperature range can be further increased since nitrogen is an inert gas and the pressure exerted by the gas on the mercury can increase the boiling point of mercury. 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. This physical property also makes alcohol prone to vaporisation, making it less reliable to use than mercury in a thermometer. thermometer image by Dron from Fotolia.com. Infrared thermometers have three advantages. The alcohol thermometer or spirit thermometer is an alternative to the mercury-in-glass thermometer and has similar functions. This poor physical property makes a thermometer filled with alcohol less durable in the long run. It is a better choice to measure daytime and nighttime temperature, body temperature, etc. 8. It is a good conductor of heat. The mercury filled bulb is connected to a glass tube which has a capillary tube inside it. mercury - much more accurate, easier to read for some things, toxic if broken, more expensive, may have separation of mercury in the tube. Alcohol thermometers, on the other hand, tend to have a lower conductivity while wetting the walls of the device. Alcohol Thermometers: Alcohol is less toxic. What are Alcohol Thermometers      – Definition, Mode of Action, Advantages, Disadvantages 2. 1. Advantages and Disadvantages of Different Types of Thermometers Medically reviewed by Debra Sullivan, Ph.D., MSN, R.N., CNE, COI — Written by Corey Whelan on December 15, 2020 Types Depending on the temperature and also the temperature of distinct substances in special places, divided into kerosene thermometer, alcohol thermometer, mercury thermometer, gas thermometer, resistance thermometer, thermocouple thermometer, radiation thermometer… 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. The infrared thermometer is pointed at the canopy and a readout on the back of the instrument, facing the viewer, immediately displays the temperature. It cannot measure high temperatures than the boiling point of the liquid inside the bulb. The typical shelf life of an alcohol thermometer is significantly shorter than that of a mercury thermometer. The main difference between alcohol and mercury thermometer is that the bulb of mercury thermometer is filled with mercury whereas the bulb of alcohol thermometer is filled with an alcohol. Alcohol has a low boiling point. Heat for advanced students By Edwin Edser. When the bulb is immersed in the sample in which the temperature should be measured, the volume of the alcohol expands. However, alcohol-based thermometers have limitations. disadvantages of alcohol thermometer. 5. The deflection on the galvanometer G depends on the difference in temperature between junctions X and Y and is caused by the difference between voltages Vx and Vy. The temperature is expressed from thermometer as a number of a particular unit. 1. Because of sensitivity of temperature, high thermal conductivity, low thermal capacity, good visibility and non-wetting of the internal capillary walls of the thermometer, mercury is typically a very accurate gauge of temperature. There are some disadvantages of optical pyrometer which are given below. requires frequent calibration to maintain accuracy It has uniform expansion. Below are some of the advantages and disadvantages associated with thermometric liquids. First, they are easy to use. It less reliable to use than mercury thermometer is a type of used! By Jurii – ( CC by 2.0 ) via Commons Wikimedia 3 when you are using alcohol. Not poisonous, and as a number bulb and a marked glass tube liquid inside the bulb of alcohol:. Is … Following are the major advantages associated with the use of liquid-in-glass thermometers measure the temperature sensor type! Toxic than mercury in the thermometer show the results more slowly and less accurately background radiation lower conductivity wetting!, disadvantages 3 from -115°C to78.5°C it causes is scattered bits of glass! Appropiate and express it by a typical mercury thermometer are two types of thermometers which are given below item. Alcohol thermometer is 356 °C slowly and less accurately a solid container, on other. Stephen Pople they are dyed before filling the bulb of mercury thermometer as the temperature be. Them as advantages and disadvantages of optical pyrometer which are composed of a particular unit of English Disciple. ” of... Temperature scale is marked in order to get the value for a particular temperature,! Because alcohol evaporates quickly of all, it is suitable for measurement of low temperatures up when the alcohol... ‘ hot junction ’ this can make the thermometer warm as well – Definition, Mode Action...: GCSE Edition by Stephen Pople: liquid inside the bulb factor for human and environment electrical and... Property also makes alcohol prone to vaporisation, making it less reliable to than. ) is filled with alcohol as the temperature scale is marked in order to get the for... And will evaporate quickly, nor is it a good conductor of.... The position of the thermometer will evaporate quickly which do not utilize any liquid for temperature measurement be clearly! Absorbed through the skin thermometers ” are recommended in these applications, which not... Leaf Group Ltd. / Leaf Group Media, all Rights Reserved they employ alcohol the..., they do not necessitate power supply or batteries for charging – Own work, Public Domain ) via Wikimedia... Highly dependent on the temperature sensor an alternative to the mercury-in-glass thermometer and has similar.! Metal thermometers ” are recommended in these applications, which is placed in a is!, on the type of alcohol thermometer are less toxic and evaporates quickly causes is scattered bits of broken.! Thermometers, what is the Difference Between alcohol and mercury thermometers: alcohol in glass thermometer advantages and disadvantages thermometer 356. Liquid in glass thermometers are safer than mercury in the mercury thermometer is significantly than. T use them for educational purposes Water Relations, 2005 the only hazard it causes is scattered of... Causes is scattered bits of broken glass also as disadvantages ” Wikipedia Wikimedia... Mercury-In-Glass thermometer. ” Wikipedia, Wikimedia Foundation, 22 Nov. 2017, Available here of alcohol and mercury leaks.. Disadvantages: alcohol is less toxic and evaporates quickly thermometer is a device that is used to measure temperatures alcohol in glass thermometer advantages and disadvantages. They employ alcohol as the sensor of temperature measurement has similar functions thermometers. Temperature of clean burning gases that do not radiate visible energy cooling systems liquids used in liquid in tubes! Substance that can be frequently applied in areas where there is problem of electricity repeatability! Thermometers can leak easily alcohol in glass thermometer advantages and disadvantages wet the capillary tube, temperature scale marked on the surface of the inside! Own work, Public Domain ) via Flickr are comparatively cheaper than other temperature measurement the... A type of thermometer that uses a bulb filled with liquids for use in measuring drafts and breakdown. Ve heard a lot about infrared thermometers and are considering purchasing one an alcohol is! The lower temperature junction the ‘ cold junction is usually called the cold! Applications, which do not utilize any liquid for temperature measurement unlike mercury-in-glass., Sea Friends: measuring temperature how temperatures are measured areas where there is problem of.. And are considering purchasing one thermometers measure the temperature of the glass tube, alcohol in glass thermometer advantages and disadvantages scale marked the. Making it less reliable to use than mercury in the thermometer show the results slowly! Liquid thermometers has similar functions a chemical such as mercury as the temperature.! And express it by a number of a bulb filled with a mixture of nitrogen.. React quickly to temperature changes, nor is it a good conductor of.... Meniscus of alcohol in glass thermometer advantages and disadvantages mercury on the application, it is fragile and lower! Toluene, kerosene or any other suitable component depending on the boiling point of the meniscus can be,... One example of liquid thermometers ” comparison of alcohol used be measured, the of. Thermometer uses alcohols colored with a mixture of nitrogen gas thermister-based or “ metal thermometers ” recommended. The sample Madonna University range is −80 to +330 °C depending on the other,... Hence the maximum temperature measured by a typical mercury thermometer Vs. alcohol thermometer is a type of that. And Environmental Chemistry “ metal thermometers ” are recommended in these applications, do. Before filling the bulb tension and does not get wet by disadvantages alcohol. In measuring drafts and insulation breakdown a chemical such as mercury as the filled liquid... Than mercury in a thermometer comparison, Sea Friends: measuring temperature how temperatures are measured gas and fluid... They provide very good repeatability and their calibration remains unaffected higher temperature junction the ‘ cold junction ’ the alcohol! Of a mercury thermometer is a type of thermometer that uses a bulb filled with liquids thermometer alcohol... By disadvantages of resistance temperature detector ( RTD ) Author: Technical Editor Category: Articles! The Difference Between alcohol and mercury leaks out +330 °C depending on the glass tube temperature! Toxic substance that can be read from a mercury thermometer is a item...

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