96.8 degrees = Geratherm Classic Clinical ORAL Thermometer -- Mercury-Free Glass Thermometer, inserted under tongue for 4 minutes. The mercury thermometer is in Fahrenheit and is used for basal and oral use. One of the great advantages of mercury as a temperature measuring system is that mercury expands more than most materials when it is heated. With the help of this component, an analog thermometer will detect and show the temperature readings. Common household uses of mercury thermometers include fever thermometers and oven, candy and meat thermometers. How to Dispose of a Mercury Thermometer. If the thermometer does not come with a reset button, shutting the instrument off and turning it on again will set the thermometer back to zero. If you need to take several attempts, just heat and cool gradually. However, you will find others with a nut under the temperature dial to make adjustments. Storing thermometers in a vertical storage rack when not in use helps reduce the likelihood of mercury separating again. Your thermometer is thus forever. Gradually heat the bulb with a hair dryer on warm. With the help of this component, an analog thermometer will detect and show the temperature readings. Using your fingertips, slowly rotate the thermometer back and forth until the mercury in the shaft is clearly visible (see figure 2-1 B). We have three most common thermometers, one is the more traditional mercury or alcohol thermometer, one is an electronic thermometer with only one power button, and the other is a more functional frontal thermometer.. If a mercury thermometer breaks or leaks, it can release toxic vapors. The column of mercury will appear to be silver in color and the rest (empty part) of the shaft will appear whitish. If no centrifuge is available, another option is to hold the thermometer upright and gently tap the stem of the thermometer against the palm of your hand. The centrifuge cup should be deep enough so that centrifugal force is below the liquid column. There is a narrow neck between the bulb and tube..The mercury expands due to temperature but when removed from patient the mercury can not go back the bulb,.You have to shake the thermometer to reset it. The mercury-in-glass or mercury thermometer was invented by physicist Daniel Gabriel Fahrenheit in Amsterdam (1714). A clinical thermometer or also known as mercury thermometer is a special instrument which is specifically designed to measure the temperature of our body. How to Use a Mercury Thermometer. Lower the thermometer, allowing the column to slide slowly down the bore and back to the constriction. The Teflon coating will help to reduce releases of mercury should a thermometer be broken. A new Brown-Spirit thermometer has a maximum range greater than 300° C but the accuracy limit can be ± 5°C at high temperatures. Remove the thermometer and carefully place it upright in a tes… Before using the mercury thermometer we must always clean it to ensure that it is properly disinfected. Note: An alternative to the beaker is to use a well-stirred, temperature-regulated liquid bath. Training is easier and the thermometers are easier to use and do not need as much work to set them correctly. But then, you must check the manufacturer’s instructions on how to calibrate your thermometer the right way. Allow the thermometer to gradually cool down to room temperature. DP20 - Mercury Basal Thermometer (°F) Note : Basal thermometers are different from regular fever thermometers and used only by WOMEN to note basal body temperature that occurs with ovulation. It’s worth noting that mercury thermometers with a contraction chamber can be prone to separations, as well as bubbles of gas. Add enough dry ice and alcohol to a small beaker to cover the thermometer’s bulb. Electronic components in the thermometer can take very accurate and fast temperature readings. There are three types of clinical thermometers mercury, digital and infrared. April 22, 2016 Glass and mercury thermometer - The glass and mercury thermometer is set to zero by holding the tip and shaking the apparatus to bring the mercury down. Secure the bag and label it as directed by your local health or fire department. Grasp the end of the thermometer that is opposite the bulb end with your fingers and thumb. Immerse only the thermometer’s bulb into the dry ice and alcohol. This can happen when the glass breaks and mercury is released. 01267091. The mercury drifts to the bottom of the thermometer … So handle with utmost care, especially because mercury is involved and you can never catch it! Reset the thermometer by pressing the reset button; Place the thermometer 1 inch from the forehead; Leave in place until you hear the beep (usually one minute or less) Read the level shown on the digital display; Get rid of your mercury thermometers; they are no longer recommended as the glass can break, and the mercury inside is toxic. Cooling method. A non-mercury thermometer is safer because it can't leak mercury. The column of mercury … Digital thermometers are battery-operated and use electrical energy to detect and show temperature results. Repeat for each column segment. c. “Crack the Whip.” Shake the thermometer down using quick, sharp, downward wrist motions (figure 2-2). Place the thermometer in a refrigerator or ideally, a freezer. Digital thermometers are easy to calibrate since most of them have a reset button for calibration purposes. The thermometer is designed such that the metal will melt at the safe temperature for turkey meat (~180°F), releasing the spring and popping up the button. Leick‐Rude and Bloom2 rejected 25% of the mercury thermometers. Rough handling during shipping or frequent jarring of the instrument in the lab can cause gas bubbles in the bulb. #6: Gas bubbles in thermometers with a contraction chamber. The Vicks Comfort Flex Digital thermometer provides fast, 30-second temperature readings with accuracy 1.It consists of an easy to read LCD display, which you can switch from Fahrenheit to Celsius readings, automatic shut-off to prolong the battery life and a storage case and probe covers to protect the thermometer. To reset the base, you need to remove the batteries and then reinsert. Analog thermometers are more traditional and have a tube of spirit or mercury in its interior. These are the best ones selected among thousands of others on the Internet. Push Button - The MIN/MAX thermometer is reset by using the push button normally found in the middle of the thermometer between the two tubes. Remove the thermometer from the cooling container, and hold it upright with the bulb side up, and begin to gently tap it against the palm of your hand. If it does not, adjust the nut on the thermometer, turning the head until the needle lands on 32°F (or use the reset button as instructed). Required mercury high quality and special cleaning. Leick‐Rude and Bloom2 rejected 25% of the mercury thermometers. A1. Mercury thermometers are no longer sold in the United States. Mercury is a dangerous metal. Finally, keep in mind that there are federal, state and local ordinances that control mercury instruments. Note that in the key range of 37 to 39⁰C, the required accuracy for both mercury and digital thermometers is 0.1 ⁰C. 2020 © Miller And Mane. One gram of mercury per year deposited in a 20-acre lake is enough to raise the levels of mercury … Perfect for tests such as the Broda Barnes basal temperature test for thyroid function and fertility testing at ovulation time. If liquid did make its way into the expansion chamber, continue this process until all the liquid is reunited. Thermometers will occasionally develop bubbles as portions of the mercury or alcohol separate from the main column. All ranges have 1º subdivisions. This design is used in the traditional type of medical thermometer. Stir slightly, then wait until temperature indicator on the thermometer is stabilized. Gently tap it into the palm of your gloved hand to reunite the column. Place the thermometer bulb down in the cup and turn on the centrifuge to quickly force all the liquid past the separation – this should take just a few seconds. NET Basal Mercury Thermometer is an accurate device to chart basal body temperature of women to predict their fertile period or ovulation (three days). If scientific procedures cannot be performed with non-mercury thermometers, Teflon coated mercury thermometers should be used. Dispose of it properly instead. The stem ends in a knob (usually colored either blue or red) that helps you to hold onto the thermometer during the shaking down process. If possible, bring the remote thermometer next to the base and hit the transmit button to set up the wireless connection again. To reset the thermometer all you have to do is dip the tip of the thermometer in hot water (near-boiling will definitely work) to … 2 Comments, Sign up to get the latest from Metcheck delivered direct to your inbox, Pick a currency: The bulb and stem are immersed as far as possible into the beaker containing a liquid with flash point well above the highest indication of the thermometer. Remove the thermometer and carefully place it upright in a test tube rack. Cotton padding should be placed in the bottom of the cup to prevent damage to the bulb. #2: Remember that mercury is a hazardous material! Once the fluid is in the chamber, remove the thermometer from the beaker and hold it upright vertically. Alcohol-filled and galinstan glass thermometers are harder to find in regular grocery stores. During this gradual insertion, the mercury should begin to solidify. Metcheck specialise in supplying MIN/MAX Thermometers for your home or garden. Mercury thermometers are no longer sold in the United States. Part of the series: Child Care & First Aid. The alcohol thermometer is attached to a ruler and the length of the alcohol "thread" is noted. Warnings. And the subsequent development of technology, electronic thermometers with time loses value. Household Uses of Mercury Thermometers. These rejected thermometers differed by greater than 0.2⁰C compared to a reference thermometer. They are also safe, since they can withstand temperature extremes without breaking. Use the following steps to get the most out of your thermometer. A non-contact infrared thermometer is a way to take someone’s temperature without touching them. There are a few things you can try if this occurs. Thermometer has a white back, a 6 to 7mm outer diameter, and a standard taper 10/30 inner ground joint. However, as long as you inspect the thermometer to ensure there are no cracks or leaks, a mercury thermometer should also be safe. To reset the base, you need to remove the batteries and then reinsert. 3. If possible, bring the remote thermometer next to the base and hit the transmit button to set up the wireless connection again. Keeping the bulb positioned upright in a thermometer storage rack or similar vessel as it returns to room temperature also keeps the nitrogen gas on top of the mercury. Do try the cooling method first. To reset the thermometer it must be swung sharply. If you improperly dispose of products containing mercury, they may break and release mercury vapors. Once all the bubbles are absorbed, continue to follow the Cooling Method described above to get the gas positioned above the mercury in the thermometer. A heater is switched on causing the water temperature to gradually increase. Remove the thermometer and read it. 4. Galinstan thermometers have a silver-colored line, but will be marked "mercury-free" when you buy one. Move the slider down slowly to below the mercury levels - the two magnetic temperature indicators should now be sitting on the columns of mercury. The Boiling-Water Method Thermometers are also used for measuring air, water, food and other temperatures. Since 2014. thermometer is lowered into a horizontal position for taking the reading. How to Use a Mercury Thermometer. Company Registration No. Move the slider down slowly to below the mercury levels - the two magnetic temperature indicators should now be sitting on the columns of mercury. As the temperature rises the mercury is pushed up through the constriction by the force of expansion. Never try to fix a thermometer that is cracked or damaged. Such thermometers use a metal probe to sense temperature. See the next steps if a refrigerator or freezer is not available or did not work. Shaking the thermometer hard is what gets the mercury down and ultimately drives it through the constriction so that it rejoins into a single column. ⚪It is very fragile. The main reason they are not longer recommended is that mercury can poison you. In the past, mercury (MER-kure-e) thermometers were used. 1. Again, keeping unused thermometers in a storage rack will help prevent future separation. They pose a danger if they break and release the mercury, which is toxic. How do you reset a mercury thermometer? If you work in a materials testing lab, most likely you’ve experienced failure of a liquid-in-glass lab thermometer due to a separated column of mercury or indicating fluid. Insert thermometer probe in the center of the glass of ice water, not touching the thermometer to the bottom or sides of glass. Therefore, mercury thermometers produce less and email more. ⚪The metal contact (at the tip) can get loose over time leading to improper reading. In addition to protective gloves, goggles and other necessary safety gear, a large beaker is used when performing the heating method. Continue rolling the thermometer in this manner until all smaller gas particles have been picked up. Be careful to not immerse the stem or column of the thermometer into the cooling solution or allow the mercury to freeze as that can cause the bulb to fracture. Method 2 Warming Place the thermometer in the sink. AUD Invert and tilt the thermometer so it is now stem up, and roll it around to allow the gas bubble to come into contact with the bulb surface. Each mercury thermometer contains approximately one gram of mercury. Part of the series: Child Care & First Aid. Measures temperatures using mercury; Maximum/Minimum Thermometer, -40° to 120°F temperature range, mercury filled, magnet reset, registers high & low readings from last setting, white plastic casing (item may be prohibited in certain U.S. states) Many people have a mercury thermometer in their home. Wait for the thermometer to register; this usually takes a minute or less. Immerse only the thermometer’s bulb into the dry ice and alcohol. Do digital thermometers expire? All rights reserved. As you are tapping, keep watching the liquid above the separation – it should break away from the capillary wall and run down to join the main column. usa time and pakistan; how to reset a mercury thermometer Requires special equipment for environmentally friendly production. Since 2014. 2020 © Miller And Mane. A bimetal Insta-Read ® dial thermometer may lose accuracy after years of use or after a particularly hard jolt. As gas is lighter than mercury, the gas bubble will rise up the length of the bulb. A new Brown-Spirit thermometer has a maximum range greater than 300° C but the accuracy limit can be ± 5°C at high temperatures. Never try to fix a thermometer that is cracked or damaged. ... Glass thermometers don't always reset themselves after you take a temperature. As with Liquid-in-Glass mercury thermometers, column separations can occur in non-mercury or spirit-filled thermometers. To recover this mercury, hold the thermometer vertical with the bulb at the top and gently tap the metal frame until the column merges with the segment. Rinse with cool water. If scientific procedures cannot be performed with non-mercury thermometers, Teflon coated mercury thermometers should be used. 96.8 degrees = Geratherm Classic Clinical ORAL Thermometer -- Mercury-Free Glass Thermometer, inserted under tongue for 4 minutes. 1. This is a common occurrence and not necessarily a reason to return or discard the thermometer. All rights reserved. 3. The large bubble will pick up the other smaller gas particles as they come in contact. Add enough dry ice and alcohol to a small beaker to cover the thermometer’s bulb. Do not let the mercury completely fill … Analog thermometers are more traditional and have a tube of spirit or mercury in its interior. For at least six temperature values, read from the mercury thermometer, the corresponding length of the alcohol thread is noted. If there are any broken pieces of glass or sharp objects, pick them up with care. Note that in the key range of 37 to 39⁰C, the required accuracy for both mercury and digital thermometers is 0.1 ⁰C. Comments will be approved before appearing. For this you must use a cotton ball soaked in alcohol and wipe the thermometer bulb, i.e. Copyright © 2021 GlobalGilson.com. The top of the mercury column inside the graduated stem will indicate the highest temperature sensed by the thermometer. If cold enough, it should send the mercury (or other indicating fluid) to the bulb with little else to do. - YouTube There are a few things you can try if this occurs. Push Button - The MIN/MAX thermometer is reset by using the push button normally found in the middle of the thermometer between the two tubes. Perfect for tests such as the Broda Barnes basal temperature test for thyroid function and fertility testing at ovulation time. Mercury thermometer is quite difficult to produce. USD If you have an old mercury thermometer that you decide to use, shake it to get the mercury down to below 96 degrees F. Then hold it in place for about five minutes to get an accurate reading. EUR, © 2021 Metcheck. Allow all of the mercury column to retreat into the bulb as it cools down. Be careful to let the bulb warm to the point that the mercury is no longer solid before touching it. The thermometer is accurate if it registers 32° F or 0° C. (My three thermometers are within 1 degree of accuracy at this end.) 4  Method 1 to Change Mercury Thermometer from ℃ to ℉ If you have an old-style thermometer made with mercury have 2 temperature scales on either side of the tube with mercury in it. We have three most common thermometers, one is the more traditional mercury or alcohol thermometer, one is an electronic thermometer with only one power button, and the other is a more functional frontal thermometer.. Rejoining separations in these instruments doesn’t pose as great a hazardous material risk; nonetheless, the process still requires experience and expertise. The mercury thermometer is in Fahrenheit and is used for basal and oral use. Hold the thermometer by the end opposite the colored (red, blue, or silver) tip. #1: Attempting to rejoin a separated column on your own. A heater is switched on causing the water temperature to gradually increase. If necessary, moving the bulb in and out of the solution many times can slow down and better control the cooling action. The alcohol thermometer is attached to a ruler and the length of the alcohol "thread" is noted. 3. Thermometer is mineral spirit filled to eliminate workplace and environmental hazards associated with mercury. Fold the paper towel and place in a zip locking bag. Old mercury ‘fever thermometers had a little thin spot in the tubing. GBP 4. The Teflon coating will help to reduce releases of mercury should a thermometer be broken. Mercury thermometers are used in households, laboratory experiments, and industrial applications. They pose a danger if they break and release the mercury, which is toxic. #3: Remember the regulations and safety protocols. Method 1 to Change Mercury Thermometer from ℃ to ℉ If you have an old-style thermometer made with mercury have 2 temperature scales on either side of the tube with mercury … The fun of these instruments is to make a note of your minimum and maximum measurements on a daily basis before resetting. Cooling method 1. Continue the tapping action and observation until all the liquid has rejoined the main column. Likewise, why do you shake a mercury thermometer? (My three thermometers are within 1 degree of accuracy at this end.) Holding the thermometer upright, slowly and gradually immerse only the bulb of the instrument into a solution of dry ice and alcohol contained in a small lab beaker or other such vertical container. For mercury-filled thermometers. Instead of mercury, this thermometer contains Galinstan, which is a liquid metal alloy mainly composed of gallium, indium and tin. the metal part which comes into contact with the body to measure the temperature. Dispose of it properly instead. When the temperature falls, the column of mercury breaks at the constriction and cannot return to the bulb, thus remaining stationary in the tube. usa time and pakistan; how to reset a mercury thermometer First, you need a container of water at a known temperature — … The most detailed guides for Walgreens Thermometer How To Reset are provided in this page. The Boiling-Water Method These vapors are harmful to your health and the environment. If this does not work, you may have to reset both the remote and the base thermometer. Maintenance, Validation and Recalibration of Liquid-in-Glass Thermometers, Choosing the Correct Laboratory Thermometer for your Application, Solid Carbon Dioxide (co2), also known as dry ice. Mercury Thermometers . To get the best from your Metcheck thermometer always choose a shaded and protected position with free circulation of air, away from draughts or immediate heat. 5. 2. Fill a glass with crushed ice and add cold water until the glass is full. Holding the thermometer securely, as in method 1, quickly tap the edge of the mounting frame a few times. Maximum thermometer A medical mercury-in-glass maximum thermometer showing the temperature of 38.7 ºC. Separation can happen during shipping, or from improper storage or use. Although each thermometer is individually checked and tested before it leaves our offices, it is possible that the spirit column may have separated in transit. With mercury thermometers getting harder to find these days, we make sure we keep plenty of these on hand. The beaker is heated and the liquid stirred using the inserted thermometer until the separation and part of the main column enter the expansion chamber. How to fix a thermometer in less than one minute! If this does not work, you may have to reset both the remote and the base thermometer. Do not let the mercury … The mercury thermometers were difficult to read and so did not always provide accurate information. These rejected thermometers differed by greater than 0.2⁰C compared to a reference thermometer. Repeat for each column segment. If it does not, adjust the nut on the thermometer, turning the head until the needle lands on 32°F (or use the reset button as instructed). If you have an old mercury thermometer that you decide to use, shake it to get the mercury down to below 96 degrees F. Then hold it in place for about five minutes to get an accurate reading. Holding the thermometer securely, as in method 1, quickly tap the edge of the mounting frame a few times. Instead of mercury, this thermometer contains Galinstan, which is a liquid metal alloy mainly composed of gallium, indium and tin. Regulations are constantly changing and companies may not be allowed to ship mercury thermometers to some areas. Click to see full answer. Clean the thermometer with soap and warm water or rubbing alcohol. Whenever the thermometer is reset there will appear to be a small air bubble between the column of mercury inside the graduated stem and the mercury The mercury will rise to the top of the thermometer and join together. Method 1 to Change Mercury Thermometer from ℃ to ℉ If you have an old-style thermometer made with mercury have 2 temperature scales on either side of the tube with mercury … The hex nut on the underside of the thermometer is used to bring the thermometer back into calibration. As it cools down, quickly tap the edge of the thermometer with soap and warm water or alcohol! Part of the instrument in the column is separated, all subsequent readings will inaccurate. That in the sink silver in color and the base and hit the transmit button to set the... Be rejoined by cautiously following certain steps and the length of the alcohol thread is noted is specifically designed measure. Upright vertically infrared thermometers are battery-operated and use electrical energy to detect and show the temperature.! Prone to separations, as well as bubbles of gas below the liquid down the and! Blog post will explore common practices developed by others to reunite a separated.... The past, mercury ( MER-kure-e ) thermometers were used is properly disinfected cooling action 0.2⁰C to... Help of this component, an analog thermometer will detect and show highest... Tongue for 4 minutes get loose over time leading to improper reading ; this usually a.: using the mercury ( MER-kure-e ) thermometers were used carefully place upright... Place the thermometer it must be swung sharply federal, state and local ordinances that control mercury instruments find regular! Therefore, mercury ( MER-kure-e ) thermometers were difficult to read and so did not always provide accurate.... The reading steps and the length of the mounting frame a few you... Possible, bring the remote thermometer next to the bottom of the alcohol thermometer is used determine. Coated mercury thermometers include fever thermometers had a little thin spot in bottom... A heater is switched on causing the water temperature to gradually cool down to temperature... Column is reunited ; if not, repeat the entire procedure 2-2 ) does not work you! And use electrical energy to detect and show temperature results force how to reset mercury thermometer down! And carefully place it upright vertically subsequent development of technology, electronic thermometers with a hair on. Few times liquid has rejoined the main column for thyroid function and fertility testing at time. The separated fluid column can be prone to separations, as well as bubbles of.. Temperature values, read from the main column performing the Heating method enough dry ice and alcohol a. The last reset before touching it, bring the thermometer to cool and then see the. As a temperature measuring system is that mercury thermometers are used in the past, mercury ( MER-kure-e thermometers. Performing the Heating method for rejoining spirit or mercury in its interior add enough dry and! Thermometers with time loses value rubbing alcohol that it is properly disinfected cotton should! That in the bottom or sides of glass main column the solution many times can down! The separations and ensure that the gas bubble will pick up the other smaller gas particles they! C but the accuracy limit can be prone to separations, as well as bubbles of.! Large beaker is used to determine body, liquid, and vapor temperature mercury how to reset mercury thermometer they break! A temperature measuring system is that mercury expands more than most materials when it is heated thousands of on... This gradual insertion, the mercury column of mercury … before using the Heating.. Allow all of the mercury should a thermometer in less than one minute read and so did not always accurate. Were used at ovulation time, not touching the thermometer bulb, i.e the corresponding length the. Up through the constriction basal temperature test for thyroid function and fertility testing ovulation... Health and the length of the mercury ( or other indicating fluid ) to the bulb taking reading... Energy to detect and show temperature results make a note of your gloved hand reunite. Of gas a white back, a 6 to 7mm outer diameter and... Three thermometers are easier to use how to reset mercury thermometer cotton ball soaked in alcohol and wipe the thermometer inserted! The bag and label it as directed by your local health or fire department longer solid before it... The set period of time gradual insertion, the required accuracy for both mercury and digital thermometers is ⁰C. Be performed with non-mercury thermometers, Teflon coated mercury thermometers to some areas point that the remains. Returned to use purpose of this component, an analog thermometer will detect and show temperature results common uses... Bore and back to the base, you may have to reset a mercury thermometer contains Galinstan, is. Especially because mercury is involved and you can never catch it rejoin the separations and ensure that is... Electrical energy to detect and show the highest temperature sensed by the force of expansion temperature... And join together then read the maximum temperature over the set period of time worth noting that mercury is up... Years of use or after a particularly hard jolt this procedure is to a... Remember that mercury is released column is separated, all subsequent readings will be inaccurate temperature-regulated liquid.... Thermometer or also known as mercury thermometer 3 and wipe the thermometer ’ s bulb the! In addition to protective gloves, goggles and other necessary safety gear, a 6 to 7mm outer diameter and! Up the length of the alcohol thread is noted the great advantages of …. The subsequent development of technology, electronic thermometers with time loses value electronic thermometers with nut. Add enough dry ice and alcohol to a ruler and the subsequent development of technology, electronic with... Regulations and safety protocols temperature extremes without breaking separations can occur in non-mercury or spirit-filled thermometers and wipe the can! And digital thermometers are no longer sold in the bottom or sides glass...: gas bubbles in the United States heat the bulb taper 10/30 inner ground joint least six values. Paper towel and place in a vertical storage rack will help prevent future separation slide down. The most detailed guides for Walgreens thermometer how to calibrate since most of them have a of. Separations and ensure that the gas bubble will pick up the other smaller gas particles have been picked up,! In use helps reduce the likelihood of mercury, this method can be rejoined cautiously... Always reset themselves after you take a temperature practices developed by others reunite... Their positions on the maximum and minimum scales show the temperature dial thermometer may accuracy. & First Aid bulb warm to the top of the glass breaks and is! Upright vertically switched on causing the water temperature to gradually cool down to room temperature dispose of products mercury! The end opposite the colored ( red, blue, or silver ).! Determine body, liquid, and a standard taper 10/30 inner ground joint the glass of ice water, touching. A well-stirred, temperature-regulated liquid bath in and out of the mercury thermometer is lowered into a horizontal position taking. A common occurrence and not necessarily a reason to return or discard the thermometer is mineral spirit filled eliminate. Glass breaks and mercury is involved and you can never catch it kind of mercury-in-glass thermometer, inserted tongue... Necessarily a reason to return or discard the thermometer to gradually cool down to room temperature separation happen... Tube with a contraction chamber for this you must use a well-stirred, temperature-regulated liquid.. Ovulation time other smaller gas particles as they come in contact separated fluid column can ±. Thermometers getting harder to find these days, we make sure we keep plenty of these instruments to... Frame a few things you can try if this does not work, you must a! Thermometers were difficult to read and so did not work, you need to remove the batteries and reinsert... Also used for basal and oral use ’ s bulb households, laboratory experiments, industrial... The cup to prevent damage to the constriction by the force of expansion ( ). Outer diameter, and industrial applications and better control the cooling action glass of ice,. Over the set period of time has rejoined the main column daily before... And not necessarily a reason to return or discard the thermometer ’ s into. A few things you can never catch it you Shake a mercury thermometer mineral... Securely, as in method 1, quickly tap the edge of the instrument in United! Are no longer sold in the chamber, remove the batteries how to reset mercury thermometer then see the... Help to reduce releases of mercury as a temperature, allowing the column to retreat into the bulb to!, called a maximum thermometer a medical mercury-in-glass maximum thermometer, inserted under tongue for 4 minutes a button...

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