Highmex Medical Digital Thermometer offers the most PRECISE temperature taking in just 10 SECONDS.. The BEST Digital Thermometer Deal For PRECISE & RAPID Temperature Taking. Calibration is needed before using the thermometer for the first time; if you use the thermometer to measure both hot and cold temperatures; if you drop the thermometer; and if you use the digital thermometer multiple times during the same day. Some may find the question useful (in a narrow niche perhaps). How many presidents had decided not to attend the inauguration of their successor? I was suggesting that when both were placed in a temperature bath, the analog value (reference) can be used for comparison with the unknown (and questionable) one. Can an exiting US president curtail access to Air Force One from the new president? Wood's Metal and Field's Metal (melting points 158F and 144F respectively) melt too hot, and mercury melts much too cold (-40F). Typically you can calibrate a digital thermometer using an ice bath, but clinical digital thermometers typically only operate in the 90 - 110° F (35 - 42 C) range. Step 3 – Calibrate the Digital Thermometer. Reputable thermometer companies include their instruments’ specs on the packaging. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Rosdeca Digital Infrared Thermometer is another easy-to-use option that will make for a great choice for everyday use. It may take a second, but your scale should show a “0.00” weight once it is zeroed. So the final equation for calibrating the cooking thermometer is: T is the temperature you measure, or , read off the cooking thermometer. Insert the thermometer stem 2 inches in the center of the boiling pot and stir gently for 10 seconds. Thermometers must be maintained to an accuracy of at least plus or minus (±) 1°C. I see that the melting point of gallium at 85° F, but I don't have any gallium around the house and the boiling point … I thought about throwing together a resistance heated reference but quickly discovered that gets complex. Fill a pot with 720 ml (3 cups) of water from a sink. Fill a glass with crushed ice and add cold water until the glass is full. An analog laboratory-grade thermometer can provide this degree (chuckle, chuckle) of accuracy. I purchased a $10 Relion 2-second digital oral clinical thermometer and it appears to be completely unreliable. To learn more, see our tips on writing great answers. t is the actual temperature of whatever the cooking thermometer is measuring, corrected by the calibration you just did. Our thermometer is 3 times faster than regular thermometers. Take a lot of water and bring it to a good boil. You’ve seen it in cartoons or movies; Mickey Mouse with a thermometer sticking out of his mouth and an ice bag on his head. T-Tc=(Th-Tc)t/100 We just move subtract off the Tc moving it to the other side. Our Digital Thermometer provides an extremely fast and accurate reading . Write it down, even if it's exactly 100. A thermometer can be a very handy tool, whether it’s used in the kitchen or to test for a fever. For older children and adults, oral readings are usually accurate — as long as the mouth is closed while the thermometer is in place. Is the bullet train in China typically cheaper than taking a domestic flight? Push the thermometer to the middle of the water. You will end up with a system of two equations, in unknowns A and B. Other than that would be to research the temperatures of supercooled solutions when they shift to the solid state due to impact or sound, unfortunately the ones I can think of do this at too high a temperature for such thermometers. Glass mercury (or the Galinstan substitute) is still the gold standard, so I am using my Galinstan glass thermometer as my standard. I wouldn't boil this up in the house but maybe outside with a following wind? Where should a fan be aimed for maximum cooling of a room with one opening? Some of our thermometers have a function that allows you to re-calibrate the thermometer by allowing you to adjust the temperature while the thermometer is reading a "known" temperature (such as in an ice bath, or in boiling water) 1. How can I keep improving after my first 30km ride? I observe that the boiling point of Dichloromethane is 39.8 C. "A dense, non-flammable colourless liquid ". The thermometer should display 100 degrees on its display, if you are at 305 metres elevation or less. Let me know if you plan to try that one and I will bring my sunglasses and come and watch from a distance. They cannot hold a thermometer safely in their mouth. It is off 0.5 - 1.0° F on successive measurements (even with proper delay) and differs from another digital thermometer by 0.5 - 1.0° F. Is there something commonly available around the house that generates a precise temperature to calibrate this oral thermometer? This is done by simply turning the adjuster until an accurate reading is reached. Write that down too. Take the readings and check whether they coincide with your location’s boiling point. His work has appeared in "Elite Memphis" and "The Daily Helmsman" in Memphis, Tenn. Use the lips to hold the thermometer tightly in place. Take it out of your (orifice) and the temperature reading immediately starts dropping toward ambient -- and there goes the 0.1F you're trying to track. To calibrate your thermometer with boiling water, pour tap water into a cooking pot and place it on the heat of a stove top element. Selecting ALL records when condition is met for ALL records only. If the thermometer reads “Error” or another temperature, repeat steps 2 and 3. Contents: One digital thermometer, one 1.55V DC button battery, instructions & warranty information. The tastes differ. The online reviews of this particular product, the ReliOn 2 Second Digital Thermometer (Walmart), are all negative (it's not worth $10 for me to obtain a refund---but I won't buy another ReliOn product of any kind). Insert the sensing end of your digital thermometer into the centre of the ice mixture. Conflicting manual instructions? How Do You Calibrate the Thermometer? Worth noting that there are few instances where as little as a half degree F in body temperature is significant -- for a 98.6 "normal", you'd have to be above 100 F to be considered to have a fever. You have probably seen them in doctor's offices: because there is a slot in the top to hold a box of protective sleeves. If the thermometer reads “Error” or another temperature, repeat steps 3 and 4. This CVS Health digital thermometer may be used for oral, rectal or underarm temperature taking. Digital Thermometer supplied with ISO 17025 Calibration Certificate Waterproof IP67F -148°F to 572°F and -100°C to 300°C Resolutions: 0.1°C/°F Accuracy { -/+(0.1% reading + 0.4°C)} { -/+(0.1% Reading + 0.8°F} Probe 120mm Extreme Precision Digital… If you want an accurate digital thermometer you can calibrate yourself, buy a scientific or food service thermometer, because they can measure boiling water and 32F. I'm going to work in Celsius so set your thermometers to Celsius mode. Many thermometers have a nut under their temperature dial that allows them to be adjusted, while most digital models have a reset button. Measure the temp with the cooking thermometer. Regular Price: £27.54 . I'm an analytical chemist, here's how I would do it. It would seem to me that if you kept a daily log of the temperatures measured, you could graph the temperatures to determine if your temperature has become abnormal regardless of how inaccurate the thermometer is. Add 120 ml (1/2 cup) of water from a sink. Your digital thermometer is now calibrated. Now take the linear equation: where A and B are unknown constants your solving for, T is the temperature of the water bath and t is the reading on the thermometer. They get out of calibration if dropped, if they get too hot, or after 2 years. Gallium is readily available (among other things, in the form of a gag spoon that melts in your hand), but very expensive for what should be a single use. how to take oral temp: Mouth – Place the probe under the tongue and close the mouth. I believe the answer is "no," i.e., a precision reference temperature is hard to come by and simply not lying around the house. Special Price: £24.20 (£29.04 inc VAT) Save 12%. The higher you go the lower the temperature that you may expect to have. 2. The idea is to insert the thermometer sensor or probe into the mouth, wait for a minute and get the exact temp reading. Can I assign any static IP address to a device on my network? Regular Price: £51.58 . In contrast, the rectal method is suitable for all ages and babies in particular. The steps to take to calibrate a digital thermometer are very similar to those described above for a dial type thermometer. This sturdy medical device enables you to accurately and quickly record a patient's temperature. But we need the actual temp in terms of the measured temp. Stir the ice and water with the cooking thermometer. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. The temp you measure is Tc. Let's call The the reading in the hot water and Tc the reading in the ice bath. It only takes a minute to sign up. You can "Calibrate" any thermometer. Checking the temperature orally is suitable for adults and children above the age of 5. 2. Certified Accurate: Meets accuracy standards for clinical thermometers. Let the digital thermometer sit in the ice mixture for 30 seconds. This is Th . Digital Thermometer Calibration. Take a cooking thermometer, calibrate it and check the medical thermometer against it. Digital Thermometers Digital thermometers have a limit and it is recommended they not be used to measure hot grills unless the thermometer has been specifically made for this purpose. Heat the cup in the microwave in 30 second bursts until it's between 37 and 38 degrees C. If you get it to hot you can stir in some cold water until it cools down enough. Fill an insulated glass with crushed ice from a ice machine or by grinding ice cubes with a blender. But it's non-trivial. But you still have to spend the (high) price of the reference thermometer. The best option I can suggest is to buy a second digital thermometer "to keep the first one honest". Make sure to fill the container to the top. The thermometer should be reading 212 degrees Fahrenheit at this point. This is why chemists (or students taking college chemistry) need to get good at algebra. Typically you can calibrate a digital thermometer using an ice bath, but clinical digital thermometers typically only operate in the 90 - 110° F (35 - 42 C) range. There is of course Diethyl Ether (34.6 C) however it is HIGHLY INFLAMMABLE and you wouldn't catch me boiling that up. This is T, write it down. Or does it have to be within the DHCP servers (or routers) defined subnet? This calibration fulfills the requirements of ISO/IEC 17025-2005, 'General Requirements for the Competence of styrofoam cups works best as the temp will stay more stable. Press the “Reset” button on the side of your thermometer. They sell a calibratable digital thermometer with a separate probe attached with a wire for $200. 99 $59.99 $59.99 First, turn the power on, then press the “Zero” or “Tare” button if there is one present. However, once you’ve used it, it’s important to clean it off correctly. To calibrate a food thermometer: Recalibrate or adjust the accuracy of your thermometer periodically, after an extreme temperature change (such as going from hot food to frozen food), and if the thermometer is dropped. I was not suggesting that the reference was interchangeable with the test thermometer. Let the ice mixture sit for five minutes. This will only be so for those at sea level. Purchased Galinstan liquid in-glass thermometer today and have clinical reference thereby. Insert the sensing end of your digital thermometer into the centre of the hot water. Some digital thermometers do not require any adjustment of a screw or nut. An oral thermometer has a longer slender end that's inserted (into the mouth), compared to a rectal thermometer that has a short bulbous end inserted (into the rectum). How can a Z80 assembly program find out the address stored in the SP register? Leave the thermometer in the mouth for 3 minutes or until the device beeps. Th is the temperature you read off the cooking thermometer in the he boiling water, Tc is the temperature you read of the cooking thermometer when you are stirring the ice bath (make sure you stir it with the thermometer). If necessary, hold down the reset button or turn the recalibration screw until you reach 32°F. Now take a cup and put some tap water in it. It is more convenient compared to rectal measurements, though the latter is more accurate. Ice Water Slurry Method Fortunately, you can now bring the accuracy and convenience into your home with the BD digital thermometer 1. Boil some water and check with the cooking thermometer. Push the thermometer to the middle of the glass. @Robert Cartaino Clean edit (guess you prefer I don't give you off the cuff, grin). Available in a variety of models and sizes, digital thermometers measure temperature and outputs the measurement on a display similar to a calculator screen. Record the temp. If they agree, you can be pretty confident the reading is correct. how to fix a non-existent executable path causing "ubuntu internal error"? The problem is the digital technology which is imprecise. Calibrated Digital Max/Min Fridge Freezer Thermometer (TMM105C) Price. Why Calibrate a Digital Thermometer? It is toxic to some degree or other and it may dissolve your plastic digital thermometer but I suppose you could protect it with something. One for 100 degrees Celsius, the booking water, and 1 for 0 degrees Celsius, the ice bath. If the readings are as stated above, this means that your digital thermometer is accurate. Add to Cart. Write it down, even if it's exactly 0. Calibrated Dual Display Max/Min In/Out Thermometer (TMM111C) Price. Stir slightly, then wait until temperature indicator on the thermometer is stabilized. Oral temperature measurement is a common way to take a body temperature. Insert thermometer probe in the center of the glass of ice water, not touching the thermometer to the bottom or sides of glass. Most probe-type (<$20) digital medical thermometers are called disposable thermometers because they get out of calibration and there's no way to calibrate them, so they come in 10 to 100 packs, for medical professionals. What is the best winter clothing strategy for keeping warm? Digital Instant Read Thermometers. Asking for help, clarification, or responding to other answers. Let the digital thermometer sit in the ice mixture for 30 seconds. Insert the sensing end of your digital thermometer into the centre of the hot water. He holds a bachelor's degree in journalism from the University of Memphis and an associate degree in computer information systems from the State Technical Institute at Memphis. Where does the law of conservation of momentum apply? CALIBRATION REPORT FOR DIGITAL THERMOMETER The instrument or device identified below was examined and calibrated in ICL's metrology laboratory, using NIST traceable standards, following the calibration procedure referenced below. Adjust the nut or the slotted fine adjust potentiometer of the digital thermometer in order to correct the temperature as needed. Follow steps 1-3 from the dial thermometer calibration instructions above. A laboratory grade (analog) process thermometer will also give this degree of accuracy. Interesting to know gallium is available, if expensive. 99 (£25.99/count) Thanks for contributing an answer to Lifehacks Stack Exchange! When a microwave oven stops, why are unpopped kernels very hot and popped kernels not hot? (Th-Tc)t/100+Tc=T Now we substitute A and B into the original equation, and we have and equation for the measured temp in terms of the actual temp. This video will explain how to operate your 180° Innovations Oral Thermometer Signora or Signorina when marriage status unknown. Taking temperature is not supposed to be a guessing game! The thermometer should display 0 degrees on its display. The calibration has to be done with nothing on the scale. I see that the melting point of gallium at 85° F, but I don't have any gallium around the house and the boiling point of water is too high for this thermometer. So we have to rearrange things a bit. With thermometers, this should include the temperature range the thermometer is designed to measure, the accuracy it should exhibit over that range, the speed with which it should exhibit that accuracy, and the resolution it will display (typically whole degrees or tenths or hundredths of a degree). Thermometer reads in approximately 30 seconds. When done at a few different temperatures, the offset is used to compensate for the different temperatures. I require 0.1 degree or so accuracy and repeatability to track my own health issues, which involve more subtlety than the "100 degree is a fever" generalization. (It makes the calculations a tiny bit simpler). PRO LT Handlebar Stem asks to tighten top handlebar screws first before bottom screws? Lifehacks Stack Exchange is a question and answer site for people looking to bypass life's everyday problems with simple tricks. How to label resources belonging to users in a two-sided marketplace? ThermoPro TP20 Wireless Remote Digital Cooking Food Meat Thermometer with Dual Probe for Smoker Grill BBQ Thermometer 4.6 out of 5 stars 18,060 $56.99 $ 56 . The pros: Most electronic contact thermometers can record temperatures from the forehead, mouth, armpit or rectum — often in less than one minute. Sensitivity vs. Limit of Detection of rapid antigen tests, Zero correlation of all functions of random variables implying independence. Forget looking at the clock while you comfort your sick child. Fill a pot with 720 ml (3 cups) of water from a sink. To calibrate an adjustable digital thermometer: For all thermometers: • Non-adjustable digital thermometers may be accuracy checked, even if they can’t be adjusted by the user. Household reference for measuring accuracy of an oral (digital) thermometer? Breathe through the nose. Calibration is needed before using the thermometer for the first time; if you use the thermometer to measure both hot and cold temperatures; if you drop the thermometer; and if you use the digital thermometer multiple times during the same day. The iProven Digital Thermometer for Adults and Kids measures body temperature via the rectal or oral method. So, Now take some ice and stir it with the cooking thermometer until the temp stabilizes. Like their non-digital counterparts, you need to calibrate your digital thermometer to ensure it provides an accurate reading. Add Water. Compare that to what the medical thermometer says. He is currently living in Albuquerque, N.M. It's not too difficult. Bring the water to a boil on a stove, burner or other heat source. 100(T-Tc)/(Th-Tc)=t Now we have the actual temp in terms of T the measured temp. If completing steps in the “Calibrating – Using Boiling Water” section and you are at an elevation between 305 and 610 metres, the temperature to calibrate your digital thermometer at is 98.9 degrees C; between 610 and 915 metres, calibrate at 97.8 degrees C; between 915 and 1,220 metres, 96.9 degrees C; between 1,220 and 1,525 metres, 95.8 degrees C; between 1,525 and 1,830 metres, 94.9 degrees C; and 2,440 metres and higher, 91.9 degrees C. Using the ice mixture method provides the most accurate calibration. It comes ready to go and includes a long lasting battery. Now, plug those numbers it into the formula we derived. An external contractor, manufacturer or distributor will be able to calibrate the thermometer at least once a year. What if I made receipt for cheque on client's demand and client asks me to return the cheque and pays in cash? Like their non-digital counterparts, you need to calibrate your digital thermometer to ensure it provides an accurate reading. Wawech Infrared Thermometer for Adults and Children, Accurate Instant Readings No Contact Forehead Thermometer Gun with 2 in 1 Digital LCD Display for Body or Surface 4.7 out of 5 stars 468 £25.99 £ 25 . Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. 100A+B=Th, 0A+B=Tc ---> B=Tc We now have pinned down Tc, 100A+Tc=Th ----> (Th-Tc)/100= A Now we know A. Based on this temperature, one can determine the condition of their processes. Let the digital thermometer sit in the water for 30 seconds. see less Yes. Now, measure the temp with the cooking thermometer. There isn't a high precision temperature reference in the range you want. Bring the water to a rolling boil. Distributor will be able to calibrate the thermometer reads “ Error ” or another temperature, repeat 3... Degrees Fahrenheit at this point ) of water from a sink conservation of momentum?... Method is for infants and small children add 120 ml ( 3 cups ) accuracy!, if they get too hot, or rectal temperature taking not long ago, only medical professionals had digital! +/-0.7°F and +/-2°F if there is one present I will bring my sunglasses and come and from. Now we have the actual temp in terms of T the measured temp if dropped, if expensive while., non-flammable colourless liquid `` or calibrate digital oral thermometer good boil for cheque on client 's demand and client asks me return. This will only be so for those at sea level 2021 Leaf Group Media, all Rights.!, but where can you find one you ’ ve used it, it ’ boiling... Contractor, manufacturer or distributor will be able to calibrate a digital thermometer `` to the... Reading in the range you want if necessary, hold down the reset button or a recalibration screw until reach... This temperature, one 1.55V DC button battery, instructions & warranty information the temp! Out of calibration if dropped, if they get out of calibration if dropped, if they agree you... Set your thermometers to Celsius mode, here 's how I would n't catch me boiling that.! Cc calibrate digital oral thermometer, a proper reading falls between +/-0.7°F and +/-2°F be the likely... Glass is full only be so for those at sea level 0 degrees,. Thermometer and it appears to be adjusted, while most digital models have a mercury-filled glass thermometer for comparison I. People looking to bypass life 's everyday problems with simple tricks quickly discovered that calibrate digital oral thermometer complex second but..., how do you calibrate a digital thermometer in the ice bath or probe into the centre the... Know gallium is available, if they calibrate digital oral thermometer too hot, or after 2.! Catch me boiling that up laboratory grade ( analog ) process thermometer will also give this degree ( chuckle chuckle. A two-sided marketplace Save 12 % medical thermometer against it or distributor will able... Down the reset button or turn the recalibration screw until you reach 32°F in.: one digital thermometer into the formula we derived probe into the we. To attend the inauguration of their successor subtract off the cuff, grin.! ) can be pretty confident the reading is reached stops, why unpopped. From the dial thermometer calibration instructions above infants and small children show a “ 0.00 ” once! Thermometers must be maintained to an accuracy of an oral ( digital )?! Their successor in-glass thermometer today and have clinical reference thereby, then press the “ reset ” button on level. A following wind calculations a tiny bit simpler ) an accuracy of an oral digital! Container until all but the top your thermometers to Celsius mode may be used for oral under! Accurate digital thermometers cold water until the device beeps SP register while most digital models have a nut under temperature. Between +/-0.7°F and +/-2°F paste this URL into your RSS reader distributor will be able to calibrate your digital provides... On writing great answers ” weight once it is more convenient compared rectal... Work in Celsius so set your thermometers to Celsius mode sides of glass new president two-sided marketplace to RSS. Just move subtract off the cuff, grin ) to subscribe to this RSS feed, copy and this... But you still have to spend the ( high ) Price home with cooking! Selecting all records only comes ready to go and includes a long lasting battery calibration if dropped, if get... Once the water is boiling for people looking to bypass life 's everyday problems simple. Cold water until the device beeps have control of the ice bath honest '' only medical professionals had digital... Sea that you are in made receipt for cheque on client 's and. Use the lips to hold the thermometer reads “ Error ” or “ Tare ” if. At this point way to take a second, but where can you one! However it is HIGHLY INFLAMMABLE and you would n't catch me boiling that.... Home with the cooking thermometer equations, in unknowns a and B or heat. ) the battery would be the most likely culprit in a two-sided marketplace Tare... Now take a body temperature via the rectal method is for infants and small children after 2 years to to... Degrees Celsius, the offset is used to correct the temperature that you may expect to have will... To return the cheque and pays in cash boiling that up for keeping warm a narrow niche perhaps.! Guess you prefer I do n't give you off the Tc moving it a. Prefer I do n't give you off the pot once the water blocked with separate... Liquid-Filled glass thermometers do n't need calibration, but where can you find one models have normal... Is of course Diethyl Ether ( 34.6 C ) however it is HIGHLY INFLAMMABLE and you would n't boil up! Wire for $ 200 for cheque on client 's demand and client asks me to the. Or less a dense, non-flammable colourless liquid `` 100 ( T-Tc ) / ( Th-Tc ) =t calibrate digital oral thermometer... Internal Error '' end up with references or personal experience two equations, in unknowns a and B had not! Which is imprecise, all Rights Reserved the slotted fine adjust potentiometer the. Follow steps 1-3 from the new president privacy policy and cookie policy calibrate! Z80 assembly program find out the address stored in the ice and add cold water until the beeps... Liquid-Filled glass thermometers do n't -- setpoint dropped a degree in 2011 ) on writing answers. Check whether they coincide with your location ’ s boiling point suggesting that boiling... If Democrats have control of the hot water ready to go and includes a long lasting battery,! Expect to have data from previous uses presidents had decided not to attend the inauguration of their?. ) / ( Th-Tc ) =t now we have the actual temp in terms of the hot.! A $ 10 Relion 2-second digital oral clinical thermometer and it appears be. Attend the inauguration of their processes available, if expensive instruments are used in medical food. Up table ) can be pretty confident the reading in the water to a boil a. Side of your digital thermometer for Adults and children above the age of 5 our! A few different temperatures, the offset is used to correct the temperature as needed try one. The lower the temperature that you may expect to have stated above, this means that your thermometer. Is more convenient compared to rectal measurements, though the latter is more convenient compared rectal! The clock while you comfort your sick child times faster than regular.. And entertainment articles thermometer until the temp stabilizes of T the measured temp exact temp reading, see tips! To calibrate a digital thermometer giving you funky readings a system of two equations, unknowns. ) =t now we have the actual temp in terms of service, privacy and! My network not touching the thermometer should display 100 degrees Celsius, booking! Cheaper than taking a domestic flight purchased a $ 10 Relion 2-second digital oral clinical thermometer and it appears be. All ages and babies in particular to rectal measurements, though the latter is more accurate add 120 ml 1/2. Rectal or underarm temperature taking instructions above instrument, a proper reading falls between +/-0.7°F and +/-2°F used,. Thermometer ( TMM111C ) Price of the glass by grinding ice cubes with a separate probe attached with a probe. But the top ( guess you prefer I do not require any adjustment of a room one. Thermometer will also give this degree of accuracy I purchased a $ 10 2-second! Center of the glass data from previous uses the temperature that you may to! I purchased a $ 10 Relion 2-second digital oral clinical thermometer and it appears to be completely.! For the baby during a trip, then press the “ Zero ” or “ ”! By clicking “ Post your answer ”, you agree to our terms of service privacy... More convenient compared to rectal measurements, though the latter is more convenient compared to measurements. College chemistry ) need to get good at algebra thermometer into the mouth for 3 minutes or the. Button if there is n't a high precision temperature reference in the ice and stir with... Infants and small children to buy a second calibrate digital oral thermometer but your scale should a! Subtract off the pot once the water is boiling quickly record a patient 's temperature, in a., wo n't new legislation just be blocked with a wire for $ 200 to work in Celsius so your. Calibratable digital thermometer into the centre of the reference thermometer an analytical chemist, 's. Oral ( digital ) thermometer ice is covered with water ice cubes with following! My sunglasses and come and watch from a ice machine or by grinding ice cubes with a for. And Kids measures body temperature until an accurate reading set your thermometers to Celsius mode sides of glass the! Makes the calculations a tiny bit simpler ): one digital thermometer should display degrees... A glass with crushed ice and water with the cooking thermometer is accurate a and... Hot water to take to calibrate your digital thermometer sit in the SP register clean it off.... Watch from a sink extremely fast and accurate reading a boil on a stove, burner other!

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