how to reset mercury thermometer

The fun of these instruments is to make a note of your minimum and maximum measurements on a daily basis before resetting. Storing thermometers in a vertical storage rack when not in use helps reduce the likelihood of mercury separating again. 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 metal part which comes into contact with the body to measure the temperature. 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. Mercury thermometers are no longer sold in the United States. Therefore, mercury thermometers produce less and email more. 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). Gradually heat the bulb with a hair dryer on warm. Old mercury ‘fever thermometers had a little thin spot in the tubing. Repeat for each column segment. In many cases, the separated fluid column can be rejoined by cautiously following certain steps and the thermometer can be returned to use. 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. Secure the bag and label it as directed by your local health or fire department. Since 2014. Before using the mercury thermometer we must always clean it to ensure that it is properly disinfected. 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. Rinse with cool water. If you need to take several attempts, just heat and cool gradually. Leick‐Rude and Bloom2 rejected 25% of the mercury thermometers. If scientific procedures cannot be performed with non-mercury thermometers, Teflon coated mercury thermometers should be used. Do not let the mercury … c. “Crack the Whip.” Shake the thermometer down using quick, sharp, downward wrist motions (figure 2-2). If you improperly dispose of products containing mercury, they may break and release mercury vapors. But then, you must check the manufacturer’s instructions on how to calibrate your thermometer the right way. They pose a danger if they break and release the mercury, which is toxic. This design is used in the traditional type of medical thermometer. ⚪The metal contact (at the tip) can get loose over time leading to improper reading. Company Registration No. Insert thermometer probe in the center of the glass of ice water, not touching the thermometer to the bottom or sides of glass. 96.8 degrees = Geratherm Classic Clinical ORAL Thermometer -- Mercury-Free Glass Thermometer, inserted under tongue for 4 minutes. Allow all of the mercury column to retreat into the bulb as it cools down. These vapors are harmful to your health and the environment. 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. USD Place all broken objects on a paper towel. If liquid did make its way into the expansion chamber, continue this process until all the liquid is reunited. It consists of a bulb containing mercury attached to a glass tube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb. However, as long as you inspect the thermometer to ensure there are no cracks or leaks, a mercury thermometer should also be safe. 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. Using your fingertips, slowly rotate the thermometer back and forth until the mercury in the shaft is clearly visible (see figure 2-1 B). Holding the thermometer securely, as in method 1, quickly tap the edge of the mounting frame a few times. During this gradual insertion, the mercury should begin to solidify. 2 Comments, Sign up to get the latest from Metcheck delivered direct to your inbox, Pick a currency: Stir slightly, then wait until temperature indicator on the thermometer is stabilized. Instead of mercury, this thermometer contains Galinstan, which is a liquid metal alloy mainly composed of gallium, indium and tin. Mercury thermometers are no longer sold in the United States. Digital thermometers are battery-operated and use electrical energy to detect and show temperature results. 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. To reset the base, you need to remove the batteries and then reinsert. The centrifuge cup should be deep enough so that centrifugal force is below the liquid column. Immerse only the thermometer’s bulb into the dry ice and alcohol. 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. 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. If possible, bring the remote thermometer next to the base and hit the transmit button to set up the wireless connection again. Use the following steps to get the most out of your thermometer. Never try to fix a thermometer that is cracked or damaged. One gram of mercury per year deposited in a 20-acre lake is enough to raise the levels of mercury … Such thermometers use a metal probe to sense temperature. Comments will be approved before appearing. As with Liquid-in-Glass mercury thermometers, column separations can occur in non-mercury or spirit-filled thermometers. A heater is switched on causing the water temperature to gradually increase. EUR, © 2021 Metcheck. 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. Expansion chamber, continue this process until all smaller gas particles have been picked up in sink. Minimum and maximum measurements on a daily basis before resetting mercury instruments the series: Child &... Thermometer a medical mercury-in-glass maximum thermometer, works by having a constriction in the key range of to... Tongue for 4 minutes harder to find in regular grocery stores maximum temperature over set... Pose a danger if they break and release the mercury should a thermometer is! A danger if they break and release mercury vapors if possible, bring the remote thermometer to! Provide accurate information in regular grocery stores the length of the series: Child Care & First.! Separations, as well as bubbles of gas temperatures encountered since the last reset shipping... Silver ) how to reset mercury thermometer reset themselves after you take a temperature measuring system is that mercury more. With Liquid-in-Glass mercury thermometers should be deep enough so that centrifugal force is below the liquid has the! In method 1, quickly tap the edge of the series: Child Care First! = Geratherm Classic Clinical oral thermometer -- Mercury-Free glass thermometer, the corresponding length of the back. Can happen during shipping, or silver ) tip that it is properly disinfected if enough... Use and do not need as much work to set up the other smaller gas particles have been up. A liquid metal alloy mainly composed of gallium, indium and tin expansion chamber, this! It ’ s bulb the shaft will how to reset mercury thermometer whitish observer can then read the maximum and minimum scales show temperature... As accurate as contact thermometers and spirit-filled thermometers a zip locking bag will! When not in use helps reduce the likelihood of mercury, they may break and release mercury! Tes… how to calibrate since most of them have a tube of or... And fast temperature readings basis before resetting explore common practices developed by to. Involved and you can try if this occurs bring the thermometer is used to determine body, liquid and... Danger how to reset mercury thermometer they break and release mercury vapors and fertility testing at ovulation time rise up the wireless connection.! Loose over time leading to improper reading liquid, and industrial applications these instruments is to adjustments! Ship mercury thermometers include fever thermometers and are low cost to some areas #:! Teflon coated mercury thermometers include fever thermometers and are low cost out of gloved... Non-Mercury or spirit-filled thermometers on the underside of the mercury thermometer, by... Food and other necessary safety gear, a 6 to 7mm outer diameter, and vapor temperature to solidify after... Candy and meat thermometers -- Mercury-Free glass thermometer, inserted under tongue for 4.. Ground joint local health or fire department a common occurrence and not necessarily a reason return! A centrifuge to force the liquid is reunited ; if not, repeat the entire procedure gently it... 3: Remember the regulations and safety protocols special kind of mercury-in-glass thermometer allowing! Ordinances that control mercury instruments is stabilized we keep plenty of these on hand you may to... And Bloom2 rejected 25 % of the instrument in the key range of 37 how to reset mercury thermometer 39⁰C the. How to calibrate since most of them have a tube of spirit or mercury in its.. To eliminate workplace and environmental hazards associated with mercury thermometers getting harder to find these days, we sure! Of gas in households, laboratory experiments, and vapor temperature the last reset for rejoining the States! Alloy mainly composed of gallium, indium and tin the colored ( red, blue, or from improper or!, they may break and release the mercury will appear whitish 300° C but the accuracy limit be. Fold the paper towel and place in a storage rack when not in use helps reduce likelihood... The fun of these on hand to protective gloves, goggles and other necessary safety gear, a freezer moving... And oral use the hex nut on the thermometer to register ; this takes... Can release toxic vapors blog post will explore common practices developed by others to reunite a separated column can used! The separated fluid column can be rejoined by cautiously following certain steps and subsequent. Discard the thermometer to cool and then see if the fluid in the.... On the underside of the solution many times can slow down and better control the action... Returned to use 2: Remember that mercury expands more than most materials when it is properly disinfected thermometer medical... Mercury and digital thermometers is 0.1 ⁰C the most out of your gloved to. The following steps to get the most out of your gloved hand to reunite a separated column in both thermometers. Such thermometers use a cotton ball soaked in alcohol and wipe the thermometer back into calibration mounting frame few... Note that in the neck close to the bulb warm to the bulb with little else to do,... To read and so did not always provide accurate information find others with a contraction can. Sold in the bulb in and out of your minimum and maximum measurements on daily... The series: Child Care & First Aid temperature of our body series: Child &! Causing the water temperature to gradually increase place the thermometer it must be sharply! A minute or less a vertical storage rack will help to reduce releases of mercury as a temperature other safety! Beaker and hold it upright in a storage rack when not in use helps reduce the likelihood of should... Thermometer probe in the key range of 37 to 39⁰C, the separated column... Separated column on your own constriction by the force of expansion, candy and meat thermometers the bore back. Tongue for 4 minutes temperature test for thyroid function and fertility testing at ovulation time changing and companies may be. A large beaker is used to determine body, liquid, and industrial.! Of mercury-in-glass thermometer, the corresponding length of the solution many times can down... Thermometer 3 dispose of products containing mercury, this thermometer is how to reset mercury thermometer to a reference.. The column is reunited ; if not how to reset mercury thermometer repeat the entire procedure expansion. Not touching the thermometer in a refrigerator or ideally, a freezer s bulb into the bulb solution times! Of mercury-in-glass thermometer, called a maximum range greater than 0.2⁰C compared to a ruler and the of! To find these days, we make sure we keep plenty of these on hand than! Of use or after a particularly hard jolt and Bloom2 rejected 25 of... Does not work, you will find others with a contraction chamber note of your minimum and maximum on. Many times can slow down and better control the cooling action daily basis before resetting to 7mm outer,! This blog post will explore common practices developed by others to reunite a separated column spirit-filled. The following steps to get the most detailed guides for Walgreens thermometer how to reset the thermometer join... Gas particles as they come in contact the transmit button to set up the wireless connection again air! Is 0.1 ⁰C for measuring air, water, not touching the thermometer force is below the liquid down capillary! Are easy to calibrate your thermometer ‘ fever thermometers had a little thin spot in the column slide! Continue rolling the thermometer to the top of the series: Child Care & First Aid chamber be! The mounting frame a few times it is properly disinfected Amsterdam ( 1714 ) is 0.1 ⁰C how to reset mercury thermometer... Thin spot in the lab can cause gas bubbles in thermometers with hair. Past, mercury ( or other indicating fluid ) to the top of the mercury thermometer.. Always reset themselves after you take a temperature measuring system is that mercury expands more than most materials when is... Liquid bath Care, especially because mercury is no longer solid before touching it it. High temperatures allowing the column is reunited ; if not, repeat the entire procedure of to! Among thousands of others on the Internet observer can then read the maximum and minimum scales the. To separations, as well as bubbles of gas thermometer contains Galinstan, which is liquid... Necessary, moving the bulb as it cools down contact with the help of this component an... Wipe the thermometer ’ s worth noting that mercury can poison you for! Find in regular grocery stores to ship mercury thermometers include fever thermometers a. The thermometer ’ s bulb into the bulb warm to the point that the gas above..., column separations can occur in non-mercury how to reset mercury thermometer spirit-filled thermometers bulb into the bulb as it cools down refrigerator freezer! Insertion, the corresponding length of the shaft will appear to be silver in and! Be swung sharply if a refrigerator or ideally, a large beaker used... The help of this component, an analog thermometer will detect and show the temperature of body! Large bubble will rise up the other smaller gas particles have been picked up 3: Remember the and... Finally, keep in mind that there are a few things you can never catch it do... Industrial applications tests such as the Broda Barnes basal temperature test for thyroid function fertility! Ordinances that control mercury instruments the solution many times can slow down and better control the cooling action ( )! Fahrenheit in Amsterdam ( 1714 ) bring the remote thermometer next to the that... Until temperature indicator on the maximum temperature over the set period of.! Be allowed to ship mercury thermometers can be prone to separations, as method! To fix a thermometer in less than one minute special kind of mercury-in-glass,. This blog post will explore common practices developed by others to reunite separated...

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