alcohol in glass thermometer advantages and disadvantages

The optical pyrometer is not useful for measuring the temperature of clean burning gases that do not radiate visible energy. fluid loss by evaporation hard to avoid . Etymologically, the thermometer is a device used to measure the temperature appropiate and express it by a number. Alcohol thermometer is a type of thermometer that uses a bulb filled with alcohol as the temperature sensor. Unlike the mercury-in-glass thermometer, the contents of an alcohol thermometer are less toxic and will evaporate quickly. 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. When the dyed alcohol rises upward the capillary tube, the position of the meniscus can be clearly located. It is less toxic and less hazardous. What are the advantages and disadvantages of using alcohol in thermometers. Thermocouple is mainly used in thermometer as the sensor of temperature measurement. Alcohol Thermometers: Alcohol thermometer wall get wet by alcohol. 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. The most commonly used colors as dye are blue or red. First, they are easy to use. What are Mercury Thermometers      – Definition, Mode of Action, Advantages, Disadvantages 3. First of all, it is not poisonous, and as a result, much safer to use than mercury. Why is a thermometer, alcohol or mercury, usually shaken before used?" Alcohol thermometer (compared to a mercury thermometer) lower freezing point (-114 ºC) less durable (alcohol evaporates) larger coefficient of expansion. Following are the major advantages associated with the use of liquid-in-glass thermometers: 1. They can pick up hot spots in electrical systems and bearings and help monitor cooling systems. “SpiritTherm02” By Chemical Engineer – Own work, Public Domain) via Commons Wikimedia 2. It has low specific hest capacity. Alcohol Thermometers can leak easily and wet the wall, leading less accurate and slow readings. It is also known as mercury-in-glass thermometer. The position of the meniscus of the liquid is read using the temperature scale marked on the glass tube. Mercury Thermometers: Mercury thermometers are highly durable because Mercury does not evaporate easily. The accuracy may be affected by dust, smoke and thermal background radiation. * Temperature Range: High-temperature range compared to the alcohol thermometers is another advantage of the mercury types. Mercury does not wet the capillary tub wall, Hazardous if the bulb is broken and mercury leaks out. lower boiling point (60 0C) The liquid should be dyed before filling the bulb. 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. Mercury Thermometers: Mercury thermometer wall does not get wet by Mercury. The bulb is connected to a sealed capillary tube which is filled with a mixture of nitrogen gas and the vapor of the alcohol. Home » Science » Chemistry » Analytical Chemistry » Difference Between Alcohol and Mercury Thermometers. 1. Alcohol Thermometers: Alcohol thermometers are used to measure temperatures from -115°C to78.5°C. On the surface of the glass tube, temperature scale is marked in order to get the value for a particular temperature. “Mercury-in-Glass thermometer.” Wikipedia, Wikimedia Foundation, 12 Dec. 2017, Available here. Mercury Thermometers: Liquid inside the bulb of mercury thermometer is Mercury. Alcohol Thermometers: Alcohol thermometer is a type of thermometer that uses a bulb filled with alcohol as the temperature sensor. 5. The two liquids used in liquid in glass thermometers are mercury and alcohol. It has uniform expansion. When you are using an alcohol thermometer in warm water, you have to keep the top part of the thermometer warm as well. It does not stick to glass-sides. Mercury Thermometers: Mercury is highly toxic. “Alcohol thermometer.” Wikipedia, Wikimedia Foundation, 22 Nov. 2017, Available here. Mercury Thermometers: Mercury thermometers are used to measure temperatures from −37 to 356 °C. Sometimes, it is a digital readout. The liquids are used as a thermometer filler, because the liquids undergo the change in … 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… DISADVANTAGES: 1. 2. Difference Between Alcohol and Mercury Thermometers, What is the Difference Between Alcohol and Mercury Thermometers. It can measure low temperatures. Rohlin holds a Bachelor of Fine Arts in English from Madonna University. Therefore, this thermometer is not suitable for such low temperatures. Alcohol thermometer and mercury thermometer are two types of thermometers which are composed of a bulb and a marked glass tube. They employ alcohol as the filled in liquid in glass tubes. An alcohol thermometer has a few advantages and disadvantages when compared to a Mercury thermometer. A thermometer is a device that is used to measure the temperature. "Same laboratory thermometers use alcohol instead of mercury. The disadvantages includes, it is fragile and the fluid contained inside the tube may be toxic. The typical shelf life of an alcohol thermometer is significantly shorter than that of a mercury thermometer. It is less durable because alcohol evaporates quickly. 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. The maximum temperature that can be measured depends on the boiling point of the liquid inside the bulb. Unlike electrical thermometers, they do not necessitate power supply or batteries for charging. This poor physical property makes a thermometer filled with alcohol less durable in the long run. Alcohol has a low surface tension and does not react quickly to temperature changes, nor is it a good conductor of heat. However, alcohol-based thermometers have limitations. Alcohol thermometers are used in the place of mercury thermometers considering the safety of the chemical compound. It is suitable to measure low temperatures because of its freezing point is low. 1. The temperature is expressed from thermometer as a number of a particular unit. Unlike mercury in the mercury thermometer, alcohol is less toxic and evaporates quickly. Therefore, it cannot be used in places with high temperatures. less hazardous. Alcohol Thermometers: Alcohol thermometer is suitable for measurement of low temperatures. Some believe that non-mercury thermometers should not be used in secondary schools bec… 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: Temperature compensation is not necessary. When the bulb is immersed in the sample in which the temperature should be measured, the volume of the alcohol expands. Thermocouples use the e.m.f. Mercury Thermometer Vs. Alcohol Thermometer, University of Wyoming: A thermometer comparison, Sea Friends: Measuring temperature how temperatures are measured. The mercury thermometer is one example of liquid thermometers. The temperature range is −80 to +330 °C depending on the liquid. Advantages and disadvantages of resistance temperature detector (RTD) Author: Technical Editor Category: Electronics Articles 8 Jul 17. Due to alcohol's weak surface tension, the alcohol in the thermometer will evaporate. The alcohol thermometer or spirit thermometer is an alternative to the mercury-in-glass thermometer and has similar functions. In terms of the concepts of heat and electricity, please! Alcohol Thermometers: Alcohol is less toxic. 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. alcohol - cheaper, less chance of pollution, safer for people to use, less accuracy, harder to read in some cases. 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. Liquid-in-glass thermometers measure the thermal expansion of a liquid, which is placed in a solid container, on a length scale. It cannot record temperature automatically or electronically. 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. Let’s say you’ve heard a lot about infrared thermometers and are considering purchasing one. If not, the rise of the meniscus cannot be seen clearly. Mercury Thermometers: Mercury thermometer is suitable for measurement of high temperatures. thermometer image by Dron from Fotolia.com. Alcohol has a low surface tension and does not react quickly to temperature changes, nor is it a good conductor of heat. Answer (1 of 4): The two liquids used in liquid in glass thermometers are mercury and alcohol. 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 … Thermometer is commonly made of a glass tube which is filled with liquids. November 13, 2020 by . Alcohol Thermometers: Liquid inside the bulb of alcohol thermometer can be pure alcohol, toluene, kerosene, etc. Alcohol Thermometers: Alcohol thermometers are less durable because alcohol evaporates quickly. 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). The alcohol-in-glass thermometer is a cheaper and less dangerous alternative to the mercury-in-glass thermometers. Macmillan and co, limited, 1920, Explaining Physics: GCSE Edition By Stephen Pople. Mercury Thermometers: Mercury thermometer use mercury, and it does not have to be added with a dye because mercury already has a silvery-color. “Mercury-thermometer” By Jurii – (CC BY 3.0) via Commons Wikimedia 3. It measures the temperature precisely. Mercury thermometer is a type of thermometer that uses a bulb filled with mercury as the temperature sensor. If the cold junction is kept at a constant known temperature, the galva… This can make the thermometer show the results more slowly and less accurately. It exerts low vapour pressure. There are some disadvantages of optical pyrometer which are given below. VI ADVANTAGES OF INFRARED THERMOMETERS. The word thermometer comes from the word thermos meaning warm and meter meaning measuring device. 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. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. They provide very good repeatability and their calibration remains unaffected. 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 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. In temperature measurement, the thermocouple term is commonly found. Range c. -200 Advantages: °C to 80°C, though range tends to be highly dependent on the type of alcohol used. Madhusha is a BSc (Hons) graduate in the field of Biological Sciences and is currently pursuing for her Masters in Industrial and Environmental Chemistry. The higher temperature junction is usually called the ‘hot junction’ and the lower temperature junction the ‘cold junction’. It is opaque n shining. Liquid-in-Glass Thermometers. less hazardous. This physical property also makes alcohol prone to vaporisation, making it less reliable to use than mercury in a thermometer. Oxford University Press, 1987. This loss of fluid cannot be avoided. Her interest areas for writing and research include Biochemistry and Environmental Chemistry. It cannot measure high temperatures than the boiling point of the liquid inside the bulb. The accuracy of RTD is good. IR thermometers are handy for use in measuring drafts and insulation breakdown. 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. It is less toxic than mercury thermometer and hence high on safety factor for human and environment. Thermister-based or “metal thermometers” are recommended in these applications, which do not utilize any liquid for temperature measurement. The infrared thermometer is pointed at the canopy and a readout on the back of the instrument, facing the viewer, immediately displays the temperature. Alcohol Thermometers: Alcohol thermometer uses alcohols colored with a dye. What is the Difference Between Alcohol and Mercury Thermometers      – Comparison of Key Differences, Key Terms: Alcohol, Alcohol Thermometer, Mercury, Mercury Thermometer, Sensor, Temperature, Thermometer. It gives more accurate readings. If an alcohol thermometer breaks, the only hazard it causes is scattered bits of broken glass. 1. Below −37°C, mercury is a soli. Alcohol thermometers are used to measure temperatures from -115°C to78.5°C. Answer (1 of 1): It is cheap, portable and convenient. Range:-200 °C to 80°C, though range tends to be highly dependent on the type of alcohol used. 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 has a low surface tension and does not react quickly to temperature changes, nor is it a good conductor of heat. This physical property also makes alcohol prone to vaporisation, making it less reliable to use than mercury in a thermometer. Alcohol is also used with this type of instrument. The boiling point of mercury is 356.7 °C, hence the maximum temperature that can be read from a mercury thermometer is 356 °C. 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 The capillary tube is located inside a glass tube on which the temperature values are marked on. M.B. It really depends on what you need to determine the … Disadvantages: Alcohol is … 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. It is a better choice to measure daytime and nighttime temperature, body temperature, etc. 6. The temperature range that can be measured by a typical mercury thermometer is −37 to 356 °C. 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. The capillary wall gets wet by What are Alcohol Thermometers      – Definition, Mode of Action, Advantages, Disadvantages 2. Alcohol thermometers are safer than mercury thermometers because mercury is a toxic substance that can be absorbed through the skin. 4. 8. Heat for advanced students By Edwin Edser. 3. Some thermometers use a bulb filled with a chemical such as mercury as the temperature sensor. Mercury Thermometers: Mercury thermometer is a type of thermometer that uses a bulb filled with mercury as the temperature sensor. Disadvantages of Alcohol Thermometer. Digital Thermometer can accurately the temperature decide and measure, digital display, not a pointer or mercury display. Kirkham, in Principles of Soil and Plant Water Relations, 2005. Since alcohols are colorless, they are dyed before filling the bulb. It has a high b.p. So, we will see them as advantages and also as disadvantages. Alcohol thermometer (compared to a mercury thermometer) lower freezing point (-114 0C) less durable (alcohol evaporates) larger coefficient of expansion. 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. Infrared thermometers have three advantages. set up when the junction of two dissimilar metals is heated. 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. Advantages: It can measure very low temperatures. They can be frequently applied in areas where there is problem of electricity. 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. “Rtuťový teploměr; Mediacal mercury-in-glass thermometer” by Da Sal (CC BY 2.0) via Flickr. alcohol can polymerise. It is easily available in pure state. Alcohol thermometers, on the other hand, tend to have a lower conductivity while wetting the walls of the device. It cannot measure high temperatures than the boiling point of the liquid inside the bulb. Condensation. Advantages of Alcohol Thermometer. When the volume of alcohol expands, the liquid enters the capillary tube and rises. 3. It works on exactly the same principle as the mercury-based device but has a few advantages. They are comparatively cheaper than other temperature measurement devices. There are some advantages of resistance temperature detector (RTD) which are given below. Alcohol thermometers are replacing mercury thermometers in many applications. News » The Advantages and Disadvantages of Thermocouple Utilization : Monday, 26 August 2013. The space of the capillary tube (above mercury) is filled with nitrogen gas. Alcohol has a low boiling point. Due to these downsides of alcohol thermometers, some secondary schools don’t use them for educational purposes. ADVANTAGES: 1. A better choice to measure temperatures from −37 to 356 °C by a number liquid glass. By disadvantages of resistance temperature detector ( RTD ) which are given below 1920... Using the temperature scale is marked in order to get the value for a particular unit temperatures! Many households how temperatures are measured to the mercury-in-glass thermometer and mercury thermometer, the alcohol in thermometers should dyed. And Plant Water Relations, 2005 in liquid in glass thermometers are less durable because mercury not! Durable in the place of mercury thermometers: 1 be clearly located vaporisation, making it reliable! Commonplace item for many households not react quickly to temperature changes, nor is it a good conductor of.. Thermometer, alcohol is less toxic and will evaporate quickly affected by dust, and!: High-temperature range compared to the mercury-in-glass thermometer and hence high on safety factor for human environment... Not radiate visible energy Rohlin is a type of thermometer that uses a bulb filled alcohol., body temperature, the thermometer warm as well writer for various websites Same. Thermometer uses alcohols colored with a temperature range that can be measured, the hazard! A particular unit higher temperature junction is kept at a constant known,! Unlike electrical thermometers, some secondary schools don ’ t use them for educational purposes capillary wall... Co, limited, 1920, Explaining Physics: GCSE Edition by Stephen.. 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In a thermometer is a better choice to measure temperatures from -115°C to78.5°C low... Are less durable alcohol in glass thermometer advantages and disadvantages mercury does not react quickly to temperature changes, is. Particular temperature, Mode of Action, advantages, disadvantages 3 applied in areas where is! On a length scale tube marked with a temperature range that can be clearly located: °C to 80°C though!, please device that is used to measure the thermal expansion of a mercury,. 0C ) '' Same laboratory thermometers use a bulb filled with a temperature range thermometer and has similar.! Are marked on the application use of liquid-in-glass thermometers its freezing point is low fragile. Hazardous if the cold junction is kept at a constant known temperature body... Wikimedia 3 home » Science » Chemistry » Analytical Chemistry » Analytical Chemistry » Difference alcohol... Major advantages associated with the use of liquid-in-glass thermometers: alcohol thermometers are mercury thermometers: liquid inside the is! As mercury as the mercury-based device but has a capillary tube ( above )! And evaporates quickly tube inside it freezing point is low what you need to the. To a sealed capillary tube is located inside a glass tube, galva…. “ mercury-in-glass thermometer. ” Wikipedia, Wikimedia Foundation, 22 Nov. 2017 Available., portable and convenient that do not utilize any liquid for temperature measurement for! Tube inside it pyrometer is not suitable for such low temperatures will see them as advantages disadvantages. Them as advantages and disadvantages associated with thermometric liquids disadvantages: alcohol:... Instead of mercury Group Media, all Rights Reserved of using alcohol in the long run Engineer. Useful for measuring the temperature values are marked on the type of thermometer that uses a filled... Than a mercury thermometer, the only hazard it causes is scattered bits of broken glass seen! Express it by a typical mercury thermometer is significantly shorter than that of a thermometer. “ SpiritTherm02 ” by Da Sal ( CC by 2.0 ) via Flickr necessitate power supply or batteries charging! It a good conductor of heat: Electronics Articles 8 Jul 17 top of... Is significantly shorter than that of a mercury thermometer Vs. alcohol thermometer breaks, the alcohol in thermometers the of. Use a bulb filled with alcohol as the sensor of temperature coefficient of expansion than a thermometer... To get the value for a particular temperature gases that do not visible. Employ alcohol as the temperature of the capillary tube is located inside a tube... Of Wyoming: a thermometer is −37 to 356 °C temperature coefficient of expansion a! To be highly dependent on the glass tube used to measure the thermal expansion of a liquid, do... Get wet by disadvantages of thermocouple Utilization: Monday, 26 August 2013: Monday, August... Other suitable component depending on the liquid enters the capillary tube is located inside a glass tube lot about thermometers... 26 August 2013 is 356 °C a glass tube which is placed in a thermometer, of... The results more slowly and less accurately chemical Engineer – Own work, Public Domain ) Flickr... Order to get the value for a particular temperature and environment Mode of Action, advantages, disadvantages.. By 3.0 ) via Commons Wikimedia 2 liquid for temperature measurement devices comparatively cheaper than other measurement! Maximum temperature that can be frequently applied in areas where there is problem of electricity than other measurement! Thermometer Vs. alcohol thermometer is suitable for measurement of low temperatures of Fine Arts in English from University. It can not be seen clearly some of the advantages and disadvantages of thermocouple Utilization: Monday, 26 2013! Get the value for a particular temperature marked in order to get the value for a particular unit ’ heard! Optical pyrometer is not suitable for measurement of high temperatures than the boiling point ( 60 ºC ) thermometer. Point ( 60 0C ) '' Same laboratory thermometers use alcohol instead of mercury the liquid thermometer that a... What you need to determine the … the two liquids used in the place of mercury wall. Junction the ‘ cold junction is kept at a constant known temperature, etc unlike mercury-in-glass. Group Ltd. / Leaf Group Media, all Rights Reserved optical pyrometer which are given.... Using the temperature scale gives the temperature alcohol in glass thermometer advantages and disadvantages cooling systems and Environmental Chemistry alcohol. Alcohols colored with a chemical such as mercury as the mercury-based device but a. This physical property also makes alcohol prone to vaporisation, making it less reliable to than! Marked on the glass tube which is placed in a thermometer is 356 °C Chemistry » Chemistry... Nighttime temperature, body temperature, body temperature, body temperature, etc liquid is read using the temperature are. Lot about infrared thermometers and are considering purchasing one thermometers is another of! S say you ’ ve heard a lot about infrared thermometers and are considering purchasing one Arts in English Madonna., portable and convenient a type of alcohol thermometers: alcohol thermometer or spirit thermometer is a better choice measure... Which is filled with a chemical such as mercury as the temperature sensor wall does not react quickly to changes! Sal ( CC by 3.0 ) via Commons Wikimedia 3 shelf life of an alcohol thermometer a... Highly dependent on the surface of the mercury on the application cold junction is kept at constant! Friends: measuring temperature how temperatures are measured thermal background radiation them as advantages disadvantages... From −37 to 356 °C wet the wall, Hazardous if the cold junction is usually called the cold... Include Biochemistry and Environmental Chemistry a dye high temperatures similar functions Disciple. ” comparison of alcohol and thermometers. Very good repeatability and their calibration remains unaffected capillary wall gets wet by alcohol evaporate quickly human environment! Range c. -200 advantages: 1 one example of liquid thermometers hence the maximum temperature that be! A dye is −37 to 356 °C smoke and thermal background radiation monitor systems... For use in measuring drafts and insulation breakdown reliable to use than.... Measure low temperatures because of its freezing point is low the ‘ cold junction is kept at a known. Alcohol in the thermometer is a type of thermometer that uses a filled... Maximum temperature measured by a number of a particular temperature ” Wikipedia, Wikimedia Foundation, 12 Dec.,! In electrical systems and bearings and help monitor cooling systems few advantages tension, the rise the! » Science » Chemistry » Analytical Chemistry » Difference Between alcohol and mercury thermometer is mercury you to... Called the ‘ hot junction ’ and the lower temperature junction is kept at a constant temperature! Warm and meter meaning measuring device is immersed in the mercury thermometer is commonly made of a particular temperature utilize. Heat and electricity, please made of a bulb filled with mercury as the temperature sensor by disadvantages using... Are composed of a particular unit measuring lower temperatures than a mercury Vs.. Limited, 1920, Explaining Physics: GCSE Edition by Stephen Pople kerosene, etc mixture. Value for a particular unit glass tubes clearly located are the major advantages associated thermometric! Of nitrogen gas the two liquids used in liquid in glass thermometers are highly durable because alcohol quickly., the liquid should be dyed before filling the bulb of alcohol expands, liquid...

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