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mercury thermometer reading

Mercury fever thermometers are made of glass the size of a straw, with a silvery-white liquid inside. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Contact Us to ask a question, provide feedback, or report a problem. Mercury-in-glass thermometers are less used in the 21st century as preference is shifted to other types of thermometers, such as digital, alcohol-filled and organic-based thermometers. Mercury thermometers can be used to determine body, liquid, and vapor temperature. 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. before the electronic … 5 0 obj /Creator (PScript5.dll Version 5.2.2) View a list of the updated ASTM standards. Mercury thermometers are no longer recommended because they can break and allow mercury — which is toxic — to escape. 4. These thermometers use electronic heat sensors to record body temperature. United States Environmental Protection Agency. /Im3 30 0 R Collectible mercury thermometers on eBay come in many shapes, sizes, and transduction methods. Liquid thermometers can be limited by the type of liquid used. /Type /Action A medical mercury-in-glass maximum thermometer showing the temperature of 38.7 °C. << Don’t use a mercury thermometer, which can be dangerous if it breaks. /Cs9 [/Indexed [/ICCBased 32 0 R] 4.7 out of 5 stars 22,027. stream >> If the thermometer breaks, the mercury may be breathed in or absorbed (soaked) into your skin. This is to help remove the threat of thermometer breakage and the subsequent release of mercury vapor indoors. Show More on How to Read a Glass Thermometer endobj After shaking the mercury down, put the thermometer 1 inch into the rectum. Mercury thermometers may be used in many applications, including chemical experiments, water and acid baths, blood banks, ovens and incubators. /S /D /ColorSpace << << endobj Microsoft Word - ii-27.doc 3 0 obj Thermometer for Fever, Quick Reading Digital Waterproof Oral Thermometer with Fever Indicator and Memory Recall, Best Accurate Rectum Armpit Reading Thermometer for … thermometer. >> Kizen Digital Food Thermometer for Kitchen, Outdoor Cooking, BBQ, and Grill! The basic concept of each different type of thermometer is the same, but the style differs. %���� In response to our understanding of the health concerns associated with mercury exposure, these types of thermometers usually use some type of liquid alcohol. Use a thermometer with a long bulb. Mercury thermometers Once a staple in most medicine cabinets, mercury thermometers use mercury encased in glass to measure body temperature. endobj /F5 25 0 R As the temperature rises, the mercury is pushed up through the constriction by the force of expansion. You can use Earth911's Recycling Locator Exit to find a mercury recycling center near you. /Im1 28 0 R Glass and mercury thermometers are just what they sound like. 6 0 obj 2. In the past, mercury (MER-kure-e) thermometers were used. << Today, mercury thermometers aren't recommended because they can break and allow mercury to vaporize and be inhaled. The outside is made of glass and the fluid inside is mercury, which reacts to temperatures and shows a reading. For more information about phasing out industrial mercury thermometers, visit EPA's Phasing Out of Mercury Thermometers Used in Industrial and Laboratory Settings page. << DP37 - Thermometer Clinical, Flat, Dual Scale, Extra Large Size. Overall, the less invasive the measurement, the less accurate it is. /Im2 29 0 R 7 0 obj No, you should not use your old glass thermometer that contains mercury. /Type /Pages endobj /Author (bookert) endobj endstream the visible scale that is marked on a mercury-in-glass thermometer or the digital readout on an infrared … Such thermometers have mercury inside. 1 0 obj They are also safe, since they can withstand temperature extremes without breaking. /Parent 2 0 R Understandably, forehead thermometers provide the easiest and fastest methods, but when … /MediaBox [0 0 612 792] Getting the Thermometer Ready Pick a glass thermometer without mercury. /Kids [7 0 R 8 0 R]  Mercury thermometers can be used to determine body, liquid, and vapor temperature. Broad categories of reasonably priced thermometers. Learn more about how to tell if there is mercury in your fever thermometer. >> These liquid thermometers are based on the principal of thermal expansion. 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. >> /F2 22 0 R 11 0 obj Warnings. 8 0 obj We're not even going to list pros and cons as we do not recommend that anyone use a glass and mercury thermometer. In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. Some of these thermometers do not have replaceable batteries. Alcohols, such as ethanol, boil at about 78 degrees Celsius (172 degrees Fahrenheit). If the liquid in your thermometer bulb is silver, then the liquid might be: a non-toxic compound that looks similar to mercury.  Â. polychlorinated biphenyl (PCB) waste disposal. 4  These can all be used orally, rectally, or in the armpit. You should choose a thermometer that is easy to use and read. /Resources 19 0 R /Title (Microsoft Word - ii-27.doc) Mercury thermometers are designed utilizing the idea that mercury expands with heat. endobj Reading a glass thermometer is a helpful skill to learn. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. /Type /Page /Nums [0 9 0 R] To date, multiple ASTM standards have been updated to approve the use of mercury-free alternatives for temperature measurement. A slight amount of mercury is placed into the base of the thermometer, and as heat warms the base of the thermometer, it increases the mercury level, pushing it up a narrow tube so we can physically read the increase on the thermometer; however, at a slow pace. 2 The tip of the thermometer must be placed under the tongue. You may need to hold the thermometer in place for three or more minutes in order to get a correct reading. /XObject << /ProcSet [/PDF /Text /ImageB /ImageC /ImageI] >> A digital thermometer is useful for taking underarm temperature. The mercury thermometers were difficult to read … If any of these conditions hold, the reading of a liquid-in-glass thermometer may not correspond to the reading of an alternative thermometer, even if both thermometers are perfectly accurate. /Font << /Metadata 3 0 R A variety of accurate and reliable mercury-free fever thermometers are available at your local pharmacy. The most similar alternatives to mercury fever thermometers are battery- and solar-powered digital thermometers. %PDF-1.3 You can read more about the impact the decision will have in NIST’s February 2011 press release announcing the change. Get it as soon as Tue, Jan 5. /F1 21 0 R >> The idea is to insert the thermometer sensor or probe into the mouth, wait for a minute and get the exact temp reading. >> /PageLabels 4 0 R Scores The Lowest Amongst Other Thermometers; In a test done with oral, axillary, tympanic, and forehead thermometers, it was shown that tympanic was the most accurate, while forehead thermometers did the worst. << Mercury thermometers are no longer sold in the United States. /Length 534 (You may need to wipe it clean with a tissue before reading it.) /Filter /FlateDecode Reading the glass thermometer (that is, determining the temperature shown) is done by holding the thermometer horizontally by the stem end (the end opposite the bulb) at eye level and rotating the thermometer until the mercury in the shaft can be clearly seen. This is a substance which expands when heated and accurately measures the body temperature of who is using the thermometer. If a glass thermometer breaks while checking an oral temperature, the mercury may be swallowed. endobj << This procedure is discussed below. >> 255 33 0 R] Mercury Thermometer: Let's analyze this measurement: Upon inspection of the thermometer, we observe that the finest division is a 1 o C division. /Parent 2 0 R 4 0 obj /Pages 2 0 R A thermometer has two important elements: (1) a temperature sensor (e.g. There are two general types of mercury thermometers that measure body temperature: Alternatives to mercury fever thermometers, Cleanup and disposal after breaking a thermometer, Learn more about how to tell if there is mercury in your fever thermometer, NIST’s February 2011 press release announcing the change, final rule incorporating updated ASTM International (ASTM) standards into EPA regulations (PDF), View a list of the updated ASTM standards, Phasing Out of Mercury Thermometers Used in Industrial and Laboratory Settings page, specific state laws, resolutions and declarations, What to do when a mercury fever thermometer breaks/spills, How to recycle and dispose of mercury products, Oral/rectal/baby thermometers, containing about 0.61 grams of mercury, Basal temperature thermometers (used to track slight changes in body temperature), containing about 2.25 grams of mercury. /Rotate 0 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. Stay with your baby and hold the thermometer in place for 3 minutes. Kizen Instant Read Meat Thermometer - Best Waterproof Ultra Fast Thermometer with Backlight & Calibration. /Count 2 Although many thermometers now have a digital reading, quite a few people have glass thermometers in their homes, and some facilities use glass thermometers in certain circumstances. /S /JavaScript Consider an alcohol and a mercury thermometer that read exactly 0 C at the ice point and 100 C at the steam point. Mercury, for instance, becomes a solid at -38.83 degrees Celsius (-37.89 degrees Fahrenheit). endobj /Rotate 0 Some states and municipalities have passed laws or ordinances barring the manufacture, sale and/or distribution of mercury fever thermometers. /Cs6 [/ICCBased 32 0 R] endobj endobj << /ExtGState << /JS (this.print\({bUI:true,bSilent:false,bShrinkToFit:true}\);) /GS1 31 0 R They pose a danger if they break and release the mercury, which is toxic. /F4 24 0 R /MediaBox [0 0 612 792] << Mercury thermometers cannot measure temperatures below this point. 2 0 obj 83 $29.99 $29.99. When a substance gets hotter, it expands to a greater volume. 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. If a mercury thermometer breaks or leaks, it can release toxic vapors. EPA has launched an effort to reduce the use of mercury-filled non-fever thermometers used in industrial settings where suitable alternatives exist. 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. $19.83 $ 19. Mercury thermometers are used in households, laboratory experiments, and industrial applications.Â. Mercury medical thermometer, due to its characteristics, its performance is more accurate, and close-readings of the gas thermometer, which is used as a reference thermometer. Remove the thermometer and read it. To measure underarm temperature: Mercury is a dangerous metal. /Type /Catalog H���Mo�@������x���|�F'J�~��U����6eq,���.�u���Tv�3�3osgỳA�q%I�)� ��Y^�Jm�R�e�,o>3�j�B^���q��`�`��Ӯ�W������$দ��������m�DD�B J(���#�m�����U��w�� ��,]_@���͙~�����z�f_m1̱8p_� ��$2p�f�m�pf�w��P�M[h y-�Nur��ܺ��EL���� �RƒII-�^UGe� �b���~S���������de�wmphi$�����[49T�[ ?�M�k��vG�&��ih�� ��-.��g���!���UƠQA]. /Type /Page This method is fairly reliable as it was often used in hospitals, etc. /ModDate (D:20051007144327-04'00') /Resources 10 0 R ; We can always make an estimate of a reading to within the finest division. >> These are similar to mercury thermometers in both price and use. If you have the option, … They are common in many households, schools and medical facilities. /Producer (Acrobat Distiller 5.0.5 \(Windows\)) Older thermometers of this type used liquid mercury. If you have a mercury thermometer, don't throw it in the trash. /CropBox [0 0 612 792] If you are choosing a battery-powered digital thermometer, choose one that contains a replaceable battery. There are four broad categories of thermometers … 10 0 obj /TT2 26 0 R One special kind of mercury-in-glass thermometer, called a maximum thermometer, works by having a constriction in the neck close to the bulb. << /Type /Metadata An official website of the United States government. /TT3 27 0 R >> << >> Alcohol-filled and galinstan glass thermometers are harder to find in grocery stores than digital thermometers. When choosing a thermometer, consider these options: Digital thermometers. /CreationDate (D:20051007144327-04'00') It is more convenient compared to rectal measurements, though the latter is more accurate. Such thermometers use a metal probe to sense temperature. If the liquid in the thermometer bulb is any color other than silver, it is not a mercury thermometer. Glass and mercury thermometer. We recommend, first, that the alternative thermometer be carefully specified in construction. /CropBox [0 0 612 792] Mercury expands as the temperature increases, thus raising the reading, while decreasing temperatures contract the mercury, lowering the reading. To obtain an accurate temperature reading, a glass thermometer must remain in the mouth for three minutes, while a digital thermometer remains in the mouth until it beeps or the temperature reading appears in the window, according to Drugs.com. Shaking. Common household uses of mercury thermometers include fever thermometers and oven, candy and meat thermometers. AXILLARY TEMPERATURE 1. What to do if a mercury thermometer breaks, In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. /OpenAction 5 0 R Electronic components in the thermometer can take very accurate and fast temperature readings. 9 0 obj They are marked with numbers and in the middle have a thin line that will be responsible for marking the temperature value. /F3 23 0 R These types of thermometers were found in nearly every house and hospital at one time before digital thermometers were available. >> A glass mercury thermometer was once a staple in most medicine cabinets. /Subtype /XML >> >> This thermometer is a thin glass tube with a silver tip and line inside. Details: Easy to use, this mercury thermometer is flat in shape and little extra in size. the bulb of a mercury-in-glass thermometer or the pyrometric sensor in an infrared thermometer) in which some change occurs with a change in temperature; and (2) some means of converting this change into a numerical value (e.g. /Contents [11 0 R 12 0 R 13 0 R 14 0 R 15 0 R 16 0 R 17 0 R 18 0 R] 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. << Oral temperature measurement is a common way to take a body temperature. Mercury is bad for your health, as well as for the water, wildlife, and waste systems on earth. /Contents 20 0 R stream Therefore, the mercury thermometer other thermometers accurately measure the temperature of the human body. >> Convenient to hold and easy to read, these thermometers are most accurate and suitable for sub-lingual (under … /Length 1066 5. 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