thermometers. It is good conductor of heat. Mercury thermometers can be used to determine body, liquid, and vapor temperature. It is opaque and shiny. Mercury thermometers can be used to determine body, liquid, and vapor temperature. What to do if a mercury thermometer breaks. temperature changes, hence is sensitive. Selecting these types makes for very good narrow span measurement, the temperatureversuss resistance characteristics is shown below. (f). The light sensitivity is the only disadvantage of the laser thermometers , However , they may be handled in case we take some cautions during the time of taking the temp belonging to the substance . 4 Why are thermometers preferred to mercury thermometers? What are advantages and disadvantages of mercury thermometer? reaches the temperature of the surroundings quickly. Mercury is the only one in liquid state at room temperature. Questions Science with Answers, CBSE Advantages: Disadvantages: Dual lasers assist with target area identification for more precise non-contact temperature measurement. The disadvantages are that they break easily and there is risk of mercury poisoning if the glass tube breaks. yes some glass thermometers do that is mercury in glass Infrared thermometer facilitates temperature measurement from a distance without contact . Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. test for class 7 Math's, Online 2. Sample Papers Math's, CBSE Sharma Solution, PS Wide temperature ranges are available. At least 13statesCalifornia, Connecticut, Illinois, Indiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Hampshire, Rhode Island, Oregon, and Washingtonhave passed such laws. Analytical cookies are used to understand how visitors interact with the website. By clicking Accept All, you consent to the use of ALL the cookies. 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. What are the advantages and disadvantages of a mercury in glass thermometer. Some thermistors have a large change in resistance to a change in temperature. Disadvantages of mercury thermometers If the bulb cracks and mercury spills out, it is extremely dangerous to humans and the environment Mercury is difficult to remove and can pollute the area where it has spilt It is unable to detect frigid temperatures Its thermal co-efficient is low. ii) Mercury thermometer cannot be used in very cold regions like arctic regions because it freezes below a temperature of 39 o C. smartech('create', 'ADGMOT35CHFLVDHBJNIG50K96924VTU0A9D6T0V8SJJV89KVC9EG'); reactions organic chemistry, Bihar School Examination In addition, it is a lightweight and . Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Class 10 Civics, English Notes for class 7, Ask Pros- Mercury thermometers are used to provide exact readings of body temperature. 1 What are advantages and disadvantages of mercury thermometer? slow response. What are the advantages of using mercury in a thermometer instead of water? The traditional mercury thermometer has the mercury in a narrow It cannot measure very low temperature, because its freezing point is high (-40C) Mercury is poisonous, so it harmful if its tube is broken. papers class 8 science, Important What are the advantages and disadvantages of using digital thermometer over mercury thermometer for temperature measurement? is neither analogue nor digital. Disadvantages of mercury as a thermometric liquid -It is a good conductor of heat and therefore the whole liquid smartech('identify', ''); Get instant access to high-quality material. Solutions For class 7, NCERT Aggarwal Solutions for Math's, Worksheet for Formulas, About Most made in the 20th century are mercury-in-glass thermometers. What are the advantages and disadvantages of alcohol and mercury thermometers? View a list of the updated ASTM standards. No special tools or instruments are required for maintenance. It does not wet the interior of the glass since it has stronger cohesive force. It is a metal, so it's a good conductor of heat. Radiometers are used for remote observations. Your class 8 Doubts, Class This is to help remove the threat of thermometer breakage and the subsequent release of mercury vapor indoors. 5 Is a mercury thermometer the most accurate? Sample papers, NTSE Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. class 6 Science, Worksheet 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. 3) It does not stick to glass-sides. Its price is very high. Infrared thermometer. (c). Advantages of Mercury as a thermometric liquid. Low temperature may be associated with certain conditions such as sepsis, shock and hypothyroidism or be due to excessive outside stay in cold weather. Requested URL: byjus.com/question-answer/what-are-the-advantages-and-disadvantages-of-using-mercury-in-thermometer-5-marks-1/, User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36. Laser thermometers disadvantages. Same expansion coefficient at all temperatures. Class 7 Question. Notes Class 12, Zoology Class 12, Maths -It does not wet (cling to the sides of) the tube. Advantages of mercury thermometers: Mercury thermometers provide reliable readings. There are some disadvantages of thermistor which are given below. Temperature affects the amount the mercury is spread out. exam, Study 11 Chemistry Notes, Maths (down to -115 0C, the freezing point of alcohol; and its boiling Thus, it has a high sensitivity. Singh physics solutions, Lakhmir Sharma solutions, NTSE For NEET, Questions class 10 Geography, History Class Copyright 2022 Physics Wallah Pvt. Thermistor. Why is mercury and alcohol used in thermometers? It does not store any personal data. formulas, Math's A .gov website belongs to an official government organization in the United States. It is an opaque shiny liquid which can be easily detectable through the glass of the thermometer. The cookies is used to store the user consent for the cookies in the category "Necessary". A mercury-in-glass thermometer can quickly response to Thermometers consist of three basic elements: spirit-filled liquid, which responds to changes in heat and cold; a glass tube to house the temperature-measuring liquid; and black ink to color in the engraved scale marks with legible numbers. However, mercury is poisonous and alcohol is NOT poisonous. A clinical or medical thermometer is a thermometer used to measure human body temperature. Aggarwal solution, RD It can be used both orally and under the arm. Its price is very high. For instance, mercury thermometers are the standard equipment at surface weather stations, and bimetallic thermometers are used in radiosondes. Quiz for Class 6 Math's, Online Math's Solutions, Worksheet for NEET, Entrance Highly effective measurement tracking and recording. It may cause a cut if the glass of the thermometer breaks down. The table below compares the various thermometers. What are the advantages of mercury thermometer Class 7? Alcohols are more sensitive to temperature changes so that their volume can be clearly seen when reading the measurement results. for class 7 Science, RS Drawbacks Since they're made from glass, mercury. Thermistor has a higher output. Questions Class 8 Science, R.S wise, Chemistry Mercury thermometer has mercury inside the bulb as the temperature sensitive fluid, and in alcohol thermometers, it is an alcohol. Sample papers, CBSE The price of an infrared thermometer ranges from 500k to 1,000K IDR. It is a good conductor of hest, so it quickly absorbs heat to attain the temperature of the object. Quiz for class 11, Chapter wise Mercury has a high boiling . Digital thermometers provide faster results. -It has a high freezing point therefore it cannot be used in Class 8, Sample Advantages: Disadvantages: Mercury thermometer: Cheap: Display is harder to read: Durable: Does not work below -39 0 C (Hg freezing pount) Accurate: Cannot be used for thermograph: Easily calibrated: Slow response : Fragile : Mercury vapour is poisonous: Alcohol thermometer (compared to a mercury thermometer) 1) It is toxic in nature, even small traces of mercury in blood is harmful. -It is a good conductor of heat and therefore the whole liquid reaches the temperature of the surroundings quickly. The cookie is used to store the user consent for the cookies in the category "Performance". 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. What are the disadvantages of mercury? Advantages of using mercury in a thermometer It is opaque and shining. Class 12 notes, Chemistry cannot be used for thermograph. It's used in thermometers because it has high coefficient of expansion. They do not need any additional power source to operate. Board, Tamil Nadu ii) Mercury thermometer cannot be used in very cold regions like arctic regions because it freezes below a temperature of 39 o C. We are not permitting internet traffic to Byjus website from countries within European Union at this time. The Cherub baby 4-in-1 thermometer is an ear and forehead thermometer that reads the temperature of the baby in one second. Notes for class 7, Science temperature, while an alcohol-in-glass thermometer can only slowly They are common in many households, schools, and medical facilities. Solutions, Entrance exam Its price is very high. What qualifies you as a Vermont resident? class 6 Math's, Worksheet for mercury thermometers are not allowed on aircraft. You cannot access byjus.com. In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. Material Biology, Name Theyre often cheaper and more accurate, especially at higher temperatures. Biology Notes, Chapter These cookies will be stored in your browser only with your consent. 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. -It is a good conductor of heat and therefore the whole liquid reaches the temperature of the surroundings quickly. Previous year papers, BITSAT It is one of the oldest thermometers available in the industry. Also It is more durable than alcohol thermometer because mercury does not evaporate easily. The battery is a button-cell battery and may contain a small amount of mercury, so it should be recycled with a hazardous waste collection program. 10 Math's Notes, Class And unlike one common alternative, electronic thermometers, theyre self-contained (no wires sticking out) and require no power. To date, multiple ASTM standards have been updated to approve the use of mercury-free alternatives for temperature measurement. But mercury thermometers also have real advantages over the alternatives. The cookie is used to store the user consent for the cookies in the category "Analytics". Verma & VK Agarwal Biology Solutions, Lakhmir Disadvantages of thermocouples: Temperature measurement with a thermocouple involves the measurement of two temperatures, the junction. What are the disadvantages of mercury? from - 260 0 C to 1200 0 C. Disadvantages of Platinum Resistance thermometer:- 1) High Cost . (e). Once it is setup, it performs data logging automatically and does not . The Weaknesses or the 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. Following are the benefits or advantages of Data Loggers: It can be used in remote or dangerous situations. 2 What are the advantages of using mercury? The digital thermometer has the disadvantages of low price.a modest digital thermometer, the market price, typically is tens to hundreds. Often more expensive than other thermometer types. A lock (LockA locked padlock) or https:// means youve safely connected to the .gov website. Alcohol is transparent and this makes hard to read the thermometer. The two liquids used in liquid in glass thermometers are mercury and alcohol. Board, Online They are accurate and sensitive, having a narrow place where the mercury level rises very fast. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Solutions For Class 6, NCERT Previous Year Papers, Revision Some of these thermometers do not have replaceable batteries. heat around the glass protecting the mercury of the thermometer Their freezing points are very low and boiling point is high in case of mercury Disadvantages (d). One of the disadvantages of the alcohol thermometer is that its accuracy is a bit low. 8 Math Notes, Class 8 -It does not wet (cling to the sides of) the tube. If the liquid in the thermometer bulb is any color other than silver, it is not a mercury thermometer. rises, the mercury expands and covers more room in the This radiation is reflected by metal, so it is generally safe, even when used near food storage. Solution for Science, Worksheet for Questions Physics, Important glass tube with the readings/markings etched into the glass so it Advantages: Small size Very high sensitivity (Select range) Polarity insensitive No cold junction compensation Wide selection of sensors It gives results quickly - has a fast response time. However, you may visit "Cookie Settings" to provide a controlled consent. These can all be used orally, rectally, or in the armpit. They both have advantages and disadvantages: Class 11, Class 11 Advantages of Thermocouple: They are capable of being used to directly measure temperatures up to 2600C; and The junction of the thermocouple can be grounded and brought into direct contact with the measured material. Online Quiz Class 9, Chapter wise Medical Exam, Olympiads Heat If you break a thermometer while using it or if you improperly dispose of it, the thermometer will release mercury vapors that are harmful to human and ecological health. Resourses, Sample papers for In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. fragile. MCQ, Physics does not work below -39C (Hg freezing pount). What happens when a solid as it turns into a liquid? This cookie is set by GDPR Cookie Consent plugin. A kink in the tube stops the mercury level from falling on its own. Higher distance to spot-ratio size than other infrared models. Singh Chemistry Solutions, NCERT A minimum-maximum thermometer shows the minimum and maximum temperatures reached in any given period of time Answered In Uncategorized What are the disadvantage and advantage of infrared thermometer? Questions Biology, CBSE As part of a partnership EPA developed with the National Institute of Standards and Technology (NIST), NIST no longer provides calibration services for mercury thermometers. The cost is very low. In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. So use of mercury thermometers should be handled carefully to prevent exposure to this element. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Digital thermometer,compact, stylish, do not consist of mercury, the use would not harm to the environment. What type of medical thermometer is the most accurate? Advantages of Platinum Resistance thermometer:- 1) High accuracy of measurement . Platinum Resistance Thermometers (PRTs) rely on the fact that platinum, like many other metals, exhibits increased electrical resistance as temperature rises. Of all these, the Cherub Baby 4-in-1 thermometer is the best. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. paper Class 8 Math's, Sample Cons- Mercury thermometers are made up of glass so that they may break easily. There are some advantages of bimetallic thermometer which are given below. 2. Chemistry Notes, Class 8 Mercury has small values for the linear expansion, the variation of volume with temperature is not important. Disadvantages: Mercury is toxic . What are the relative advantages and disadvantages of mercury and alcohol in thermometers? Thermocouples are used for in situ observations at locations wired to a computer network. The following are some of the disadvantages, including: 1. You can read more about the impact the decision will have in NISTs February 2011 press release announcing the change. -It does not wet (cling to the sides of) the tube. The disadvantages of mercury as thermometric liquid are: i) its temperature coefficient of expansion is very low and it cannot be used to measure the temperature below -39C and above 357C. Advantages of mercury as a thermometric liquid. 1. Highly sensitivity allows it to work well over a small and narrow temperature range. Materials, Class display is harder to read. Below are some of the advantages and disadvantages associated with thermometric liquids. There are two types of liquid-in-glass thermometers: 1) Mercury-In-Glass Thermometers 2) Alcohol-In-Glass Thermometers. 2) Requires additional equipment such as bridge circuit, Power supply etc. Which is better digital or mercury thermometer? It expands evenly as the temperature rises. Hence, the slightest change in temperature is notable when its used in a thermometer. Mercury thermometers can be used to determine body, liquid, and vapor temperature. It will be very dangerous if broken. cannot be used for thermograph. Some of the advantages of simple barometer are as follows: 1. /* MARKETING SCRIPT */?> Mercury fever thermometers are made of glass the size of a straw, with a silvery-white liquid inside. Answer (1 of 4): Mercury is dangerous when exposed to any amount. Learn more about how to tell if there is mercury in your fever thermometer. Advantages of Mercury as a thermometric liquid. The cookie is used to store the user consent for the cookies in the category "Other. Advantages of mercury as a thermometric liquid. It consists of a lens to focus the infrared (IR) energy on to the detector that converts the energy to an electrical signal which can be displayed in units of temperature after being compensated for the ambient temperature variation . If the liquid in your thermometer bulb is silver, then the liquid might be: A non-toxic compound that looks similar to mercury, Polychlorinated biphenyl (PCB) waste disposal. What are the advantages and disadvantages of mercury as thermometric liquid? I thought it was analogue. Quiz for Class 6 Science, Online It has a wide temperature range between to degree Celsius. Advantages of using mercury in thermometers : i) It does not stick to the glass tube. The benefits of the thermocouple are listed below.. (g). Winner of the Mother and Baby Best Thermometer Award, this device has a built-in flashlight that makes reading easy. What are the two advantages of using mercury in thermometer? Mercury thermometers are designed utilizing the idea that mercury expands with heat. Solutions for class 9, NCERT Solutions This website uses cookies to improve your experience while you navigate through the website. A liquid-in-glass thermometer is the simplest and most commonly employed type of temperature measurement device. Advantages of thermocouple. Possible to measure higher temperatures as in cooking. Previous year papers, Olympiad Biology Notes, Aptitude Alcohol Thermometer This thermometer is similar to a mercury thermometer, except that the filler in this thermometer is alcohol. If there is no liquid in your thermometer, for example, if it uses a metallic strip or coil to measure temperature (like most meat thermometers do), it is not a mercury thermometer. Mercury thermometers provide accurate temperature readings and can be used orally, rectally, or under the arm. A mercury-in-glass thermometer can measure high temperature (up Advantages Comparatively inexpensive Wide temperature range (-270 C to 2100 C) Small (down to 0.25 mm diameter) Disadvantages Small signals, limited temperature resolution (0.01 C to 1 C) in some models Thermocouple wires must extend from the measurement point to the readout or ice-point junction. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. 8 SST Notes, Ask Ltd. All rights reserved. Since alcohol is non toxic, alcohol thermometers are much safer to use . Official websites use .gov Based Questions, Biology MCQ Questions Chemistry, Important Main Previous Year papers, JEE Its price is very high. This cookie is set by GDPR Cookie Consent plugin. test for class 7 Science, Chapter It has a low freezing point and a high boiling point. The data logging can work as per its design. But opting out of some of these cookies may affect your browsing experience. You can carry it with you anywhere and use it with any device. Suggest Corrections. for Math's, Worksheet Theory & Notes, Math's unique curriculum that is the best fit for every student. JavaScript appears to be disabled on this computer. Advantages of thermistor The benefits of the thermistor are: Thermistor has a compact size. What are the advantages and disadvantages of clinical thermometer? Its used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when its used in a thermometer.
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