The scale is easy to read and features dual measurements, both fahrenheit and celsius. The mercury thermometer was invented back around 1748 and there was no electricity or digital anything back then, said greg strouse, head of the temperature and humidity group at nist. Thank you for helping make the university of texas at austin a mercuryfree campus. Thermometer has a white back, a 6 to 7mm outer diameter, and a standard taper 1030 inner ground joint. Mercury containing laboratory thermometers are easily replaced with alcoholfilled or organicbased replacement fluidfilled thermometers. Iso accredited provider of calibration, recertification and repairs traceable to the national institute of standards and technology. Hb instrument b603050000 easyread glass thermometer, 10225c, total, 350mm.
Mercury quick facts cleaning up mercury spills in your house february, 2009 if a thermometer or other small mercury containing item such as a thermostat or compact fluorescent light bulb breaks, you may be able to clean it up yourself. Thermometers come in an array of styles, scales, and accuracies to match. The uses of mercury in glass thermometers sciencing. Calibration includes comparing the measurements provided by a test device a thermometer or sphygmomanometer being tested against the measurements from an accurate reference. A broken mercury household fever thermometer is relatively inexpensive to handle, though complicated and demanding for the average citizen. This program enables laboratories to exchange intact mercury thermometers for nonmercury thermometers at no cost. The teflon coating will help to reduce releases of mercury should a thermometer be broken. Mercury thermometer exchange program environmental. Geratherm mercuryfree oral thermometer at walgreens. The two digital thermometer readings underrecorded compared with mercury to the extent of 0.
Thermometer has a white back and a 6 to 7mm outer diameter, and is calibrated for 76mm 3 immersion. Unfollow mercury thermometer to stop getting updates on your ebay feed. If you are looking for a way to get rid of that old standard thermometer, the epa suggests giving it to your primary doctor since mercury is toxic. Say goodbye to mercury thermometers the seattle times. Mercurycontaining laboratory thermometers are easily replaced with alcoholfilled or organicbased replacement fluidfilled thermometers. Select desired temperature range and divisions from the product filter to narrow your choices.
The device needs to be shaken and reset to below 35c 95f before each use. The mercury thermometer is a classic design for temperature measurement still used by many families. Maximum thermometer a medical mercuryinglass maximum thermometer showing the temperature of 38. Precautions specific to the use of a mercurybased thermometer include the following. Taylor 214181j mercuryfilled thermometer w pocket case. Mercury is poisonous and attacks the bodys central nervous system. The last time i felt sick and used my digital thermometer it gave me a reading of 95. Real mercury thermometer is a location and physics based thermometer app for devices with or without an ambient temperature sensor. Furthermore, many states restrict the sale of mercury thermometers. No matter what youre looking for or where you are in the world, our global marketplace of sellers can help you find unique and affordable options. The average mass of mercury in a laboratory thermometer is around 5 grams. For example, one might calibrate to the freezing temperature of water 0c or 32f by placing the thermometer in a mixture of ice and water. Someone told me the electronic ones are not very reliable when trying to tell if someone has a fever. The air in a room can reach contamination levels just from the mercury in a broken thermometer just a few drops.
These application thermometers provide a mercury free alternative to astm mercury thermometers. One gram of mercury can contaminate a 20 acre lake, enough to cause a public advisory to be issued on the potential dangers of eating fish caught in that lake. The dangers of mercury thermometers what you should know about mercury thermometers the small silvery ball in a mercury thermometer can be dangerous if the glass breaks and the mercury is not cleaned up properly. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. It has an inbuilt mercuryinglass construction and dual reading in farenheightcelsius. When the mercury level in the thermometer stem is steady, make a mark l 0 at that level on the stem. And 2 by the time i need a thermometer once or twice a year the battery in the digital thermometer is dead. Newer nondigital fever thermometers often use alcohol or a nontoxic compound that looks similar to mercury. The volume of mercury changes slightly with temperature. One of the reasons the canadian pediatric association does not recommend the use of mercury thermometers in the home is that, if these thermometers break, you and your child or children can be exposed to a toxic substance. The resources featured on this and connected pages can help users make intelligent and informed decisions about replacing hg thermometers, acquiring the right kind of digital thermometer for a specific application, ensuring that the devices meet the latest standards, and disposing of mercury.
Check us out at mercury thermometer it is based on certain physical properties of matter, such as expansi. In both cases, these are statistically significant differences. Mercury inglass thermometer for measurement of room temperature. Thank you for your question about the reliability of digital thermometers when compared to the glass, mercuryfilled ones many.
The use of mercurybased thermometers should be limited as far as possible and especially avoided for pregnant or young patients. May 06, 2010 check us out at mercury thermometer it is based on certain physical properties of matter, such as expansi. The durable, weather resistant construction is suitable for indoor or outdoor use. A new brownspirit thermometer has a maximum range greater than 300 c but the accuracy limit can be 5c at high temperatures. Exchange mercury thermometers with nonmercury thermometers for free contact ehs at 51247511 to make arrangements to exchange your mercury thermometers. Follow the steps in this flier to clean up the spill. Daniel fahrenheits mercury inglass thermometer was far more reliable and accurate than any that had existed before, and the mercury thermometers in use today are made in the way fahrenheit devised. Mercury thermometer exchange program marquette university.
The risk of poisoning from touching or swallowing mercury from a broken. The bon mercury free thermometer is accurate with a range from 40 to 120 degrees fahrenheit. The mercury thermometer, long a fixture in household medicine cabinets and industrial settings, is going the way of the horse and buggy. They provide the same performance as a mercury thermometer, but use a blue liquid formula, which is nontoxic noncaustic, nonhazardous and biodegradable. Easy and accurate reading of the body temperature can be made with these mercury. In a thermometer, a glass bulb attached to a glass capillary tube is filled with mercury. When liquid mercury is spilled, it forms droplets that can accumulate in the tiniest of spaces and then emit vapors. Further analysis shows that, in the case of the first digital thermometer digitemp 1 oral, for 68% of subjects the reading was below that for mercury. Is there any difference between a regular thermometer and an electronic digital one. They describe the move from the standard glass, mercury filled thermometers, how to dispose of these, and what to consider when purchasing an electronic thermometer. Romed medical disposables have been sold for more than 30 years.
Guidance on maintaining and calibrating nonmercury. Mercury thermometer exchange program environmental health. Thermometer is mineral spirit filled to eliminate workplace and environmental hazards associated with mercury. It consists of a bulb containing mercury attached to a glass tube of narrow diameter. How do digital thermometers show temperature without mercury. Ideally nonmercury thermometers should be stored with the bulb lower than the expansion chamber, however this is not always possible. Mercury quick facts cleaning up mercury spills in your house february, 2009 if a thermometer or other small mercurycontaining item such as a thermostat or compact fluorescent light bulb breaks, you may be able to clean it up yourself. May 20, 2005 metallic mercury slowly evaporates when exposed to the air.
Bon tool mercury free maxmin thermometer82726 the home depot. Although currently there are digital thermometers this form of temperature measurement is still very much in demand, in addition to being very simple to use. This thermometer also reads from 40 to 49 degrees celsius. Mercury thermometer exchange environmental health, safety. Metallic mercury slowly evaporates when exposed to the air. Our mission is to sell the best quality of medical products and offer to our customers a total package of service. Mercury thermometers are still considered to be some of the most accurate temperature indicators. This handy dual scale mercury thermometer is a necessity for each home, office, clinic and hospital. Nowadays, the triple point of water is used instead the triple point occurs at 273. Corning 7712 159mm glass micro immersion bulb mercury thermometer with white back, temperature range. Thermometers are an integral part of health and safety, allowing you to monitor various temperatures precisely.
Mercury thermometers can be used to determine body, liquid, and vapor temperature. I decided to try this geratherm mercuryfree oral glass thermometer while looking online for some temperature taking device that had at least some degree of accuracy. Mercury is a liquid at room temperature, but it can quickly evaporate into a gas that has read more. If scientific procedures cannot be performed with nonmercury thermometers, teflon coated mercury thermometers should be used. Buy products such as best digital medical thermometer, easy accurate and fast 10 second reading oral and rectal thermometer for children and adults with fever indicator dtr1221a by iproven at walmart and save. Mercury has been frequently used in thermometers because it remains in liquid form throughout a wide range of temperatures. These disposal methods could cause serious harm to you and your family, as well as others in your area. It has an inbuilt mercury inglass construction and dual reading in farenheightcelsius. These application thermometers provide a mercuryfree alternative to astm mercury thermometers. Astm mercuryfilled thermometers have strict manufacturing protocols and assure high quality temperature measurements. Find mercury thermometer stock images in hd and millions of other royaltyfree stock photos, illustrations and vectors in the shutterstock collection. Mercuryinglass thermometer 2 these points are adequate for approximate calibration but both vary with atmospheric pressure. Mercury thermometers, clinical thermometer manufacturer. Guidance on maintaining and calibrating nonmercury devices 2 calibration allows the user to check and adjust the internal accuracy of a device.
Exchange mercury thermometers with non mercury thermometers for free contact ehs at 51247511 to make arrangements to exchange your mercury thermometers. Digital laboratory thermometers are equally desirable and in many cases are easier to read. Jul 11, 2016 because of the potential for toxic mercury to be leaked into the air and into the water supply, its not safe to simply throw a mercury thermometer into the garbage or flush it down the toilet. Reduce the health and environmental risks of mercury pollution.
However, mercury is a powerful neurotoxin, and the cost of cleaning a mercury spill in industry is many thousands of dollars. The mercury will evaporate and can contaminate the surrounding air and become toxic to humans. A small amount of mercury in a reservoir is subject to heat and it expands and pushes the mercury up a capillary thin tube so we can easily see th. Thank you for helping make the university of texas at austin a mercury free campus. A mercuryinglass thermometer, also known as a mercury thermometer, was invented by german physicist daniel gabriel fahrenheit in 1724 and is a thermometer consisting of mercury in a. In 2008, the nist temperature and humidity group worked with several organizations to reduce or eliminate the use of mercury thermometers. Weather resistant outdoor sensor transmits up to 330 ft. Thermometers are calibrated by exposing them to a known temperature and then marking the height of the mercury at that temperature. Nov 22, 2000 each fever thermometer contains approximately one gram of mercury. Because the thermometer contains no mercury, it is safe and environmentally friendly. Mercuryinglass thermometer 1 mercuryinglass thermometer closeup of a maximum thermometer. The key factors of a mercury thermometer exchange program are to. Please check your state and local ordinances controlling mercury instruments before ordering. Now, after nearly 300 years on the market, the stillcommon mercury thermometer appears headed for extinction.
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. Mercury thermometers are based upon the practical phenomena that mercury expands with temperature. Dp33 mercury thermometer clinical, prismatic, dual scale, economy model. This device is not recommended as a baby thermometer. If you have questions about the potential health effects after being exposed to a broken thermometer, please call your physician or your local poison control center at 1 800 2221222. As those little watch batteries cost about as much as a digital thermometer, they are basically single use for me. In a mercury thermometer, a glass tube is filled with mercury and a standard. A broken mercurycontaining thermometer can be toxic if the vapors are inhaled. Delrin thermometer, 0 to 220f temperature range, plastic nonrefillable, mercury filled, with pocket case overall length without case, is 5. Thousands of new, highquality pictures added every day. Liquid in glass thermometers thermcos precision liquid in glass thermometers are manufactured with the finest glass manufactured under iso2001 guidelines. Guidance on maintaining and calibrating non mercury devices 2 calibration allows the user to check and adjust the internal accuracy of a device. Mercury thermometers, clinical thermometer manufacturer, oral.
Sop for calibration of mercury filled glass thermometer. An investigation into the accuracy of different types of. So, as long as mercury remains inside a thermometer or a barometer, not. Facts about nonmercury thermometers environmental health. The dangers of mercury thermometers chester county, pa. Are digital thermometers as reliable as the older glass. Comark km400 digital pentype pocket thermometer w 3 stem. Marquette university has committed to a mercury thermometer exchange program as part of the universitys pollution prevention initiative. Each fever thermometer contains approximately one gram of mercury. The instructions also come in both english and spanish so everyone. The mercuryinglass or mercury thermometer was invented by physicist daniel gabriel fahrenheit in amsterdam 1714.
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