Mercuryinglass thermometer simple english wikipedia, the. Discover the best glass thermometers in best sellers. Pdf diagnostic accuracy of digital thermometer compared to. Maximum thermometer a medical mercuryinglass maximum thermometer showing the temperature of 38. In fact, digital thermometers have several advantages over traditional mercury thermometers. Glass thermometer indiana medical thermometers for sale. Daniel fahrenheits mercuryinglass 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. Precision hg laboratory thermometers thermco products. Alcohol in glass thermometer spirit thermometer is an alternative to the mercury in glass thermometer and functions in a similar way.
Average amount of mercury in a millerweber of texas thermometer is approximately 4. Even though the liquidinglass thermometer is used much less frequently today than. Mercuryinglass thermometer 1 mercuryinglass thermometer closeup of a maximum thermometer. In the past, mercury merkuree thermometers were used. Astm certified thermometers nist traceable thermco. Here are some ways to remove the void in the column. Reading a mercury thermometer is easy but require a bit of practice and skill. Mercury in glass thermometer for measurement of room temperature. Pdf is there significant difference between digital and. Mercuryinglass thermometer for measurement of room temperature.
Sop for calibration of mercury filled glass thermometer. Replace thermometer in magnifying glass to view temperature. Download 2,262 mercury glass thermometer stock photos for free or amazingly low rates. Kitchz mercury free dual scale classic traditional glass accuracy thermometer for home. The mercuryinglass or mercury thermometer was invented by physicist daniel gabriel. This study was carried out to assess the accuracy of three devices namely, liquid crystal forehead, digital electronic axillary and infrared tympanic thermometer, using a glass mercury rectal. Replacing mercury thermometers with digital thermometers the purpose of this factsheet is to encourage healthcare administrators to replace mercury fever thermometers with digital thermometers. I much prefer this style of thermometer to the digital ones as i 1 dont think the digital ones are very accurate.
Mercury thermometers are used to measure body temperature fever thermometers, liquid temperature, and vapor temperature. Liquid in glass thermometer principle the liquid in glass thermometer, is the most commonly used device to measure temperature and it is inexpensive to make and easy to use. Altitude total gainloss, 24 hours altitude record and chart. Mercury is the thermometric fluid in a mercury in glass thermometer. 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. Glass thermometers with galinstan galinstan may also be used to check an oral temperature. Oral, rectal, and axillary using a glass thermometer the body temperature of infants and children can change quickly. Mercury is the traditional fluid used for thermometers and other indicating instruments. Mercuryinglass thermometer franks hospital workshop. Get the best deals on glass thermometer indiana medical thermometers and stay healthy at home while you shop our large selection of health care products. Never put a broken mercury thermometer in the trash, and keep your children away from the contaminated area. Userfriendly guidance on the replacement of mercury. The last time i felt sick and used my digital thermometer it gave me a reading of 95. How to take an oral temperature step by step instructions.
In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. The world health organization advocates the elimination of mercury thermometers and mercury sphygmomanometer by 2020, which means that the great invention will step down from the stage. I still use my digital protectors because they fit and it cuts down on the washing of the unit. Glass thermometer,non mercury thermometer for home family, clinic, hospital,classic accuracy thermometer for adults kids baby. The top countries of suppliers are india, china, and thailand, from which the percentage of mercury in glass thermometer supply is 1%, 98%, and 1% respectively. Mercury thermometers, clinical thermometer manufacturer, oral. Mercury is stable it does not react in air and water, does not expand upon solidification and therefore will not break the glass tube of the thermometer. A liquidinglass thermometer measures temperature based on the thermal expansion of mercury or spirit alcohol in a glass. By introducing into the bore of a thermometer two platinum contact wires, one fixed at the lower end of the scale and. If the column of mercury or other indicating fluid in a thermometer separates, the void will render the indicated temperature inaccurate. The fluid in the thermometers has certain physical characteristics that make it ideal for different areas. The top countries of suppliers are thailand, china, from which the percentage of mercury oral glass thermometer supply is 1%, 99% respectively. There are serious health risks if a glass mercury thermometer breaks.
Maintenance, validation, and recalibration of liquidin. The anatomy of a liquidinglass thermometer aashto re. Place thermometer under the tongue for a minimum of 3 minutes. Glass thermometers for adult or baby, rectal axillar thermometer oral 3542 c armpit medical household items.
To confuse the issue further, there are several test standards which call for the use of a liquid in glass thermometer to be used incorrectly. A wide variety of mercury oral glass thermometer options are available to you, there are 446 suppliers who sells mercury oral glass thermometer on, mainly located in asia. Mercuryinglass thermometer 2 these points are adequate for approximate calibration but both vary with atmospheric pressure. Mercury thermometers are getting harder to find these days. Astm non mercury thermometers meet standard test method requirements for use in their referenced applications. Is the mercury thermometer more accurate than the digital. The mercury in glass thermometer was invented by daniel gabriel fahrenheit in amsterdam 1714. Liquid in glass thermometer principle instrumentation tools. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Manual of petroleum measurement standards chapter 7.
Collectible mercury thermometers on ebay come in many shapes, sizes, and transduction methods. Mercury is a persistent, bioaccumulative, toxic material that can harm the brain, heart, kidneys, lungs, and immune system of people of all ages. Do you know that many communities offer medical thermometer exchange programs, and will replace your old mercury filled thermometer with a safer non mercury one free of charge. Honde specialized in clinical oral mercury thermometer, medical glass mercury thermometer, inquire now. The liquid in glass thermometers have the same performance characteristics as astm mercury thermometers, but use safe blue liquid as an alternative to mercury. How to read a mercury thermometer, how to read a glass. Royal lee, who showed that vitamin deficiencies, due to processed foods, are responsible for most degenerative disease. In place of mercury thermometers, hospitals will use the ear thermometer to take body temperature. Package contains 1 geratherm magnatherm glass thermometer. Liquidinglass thermometers are pervasive throughout industry.
Mercury has been frequently used in thermometers because it remains in liquid form throughout a wide range of temperatures. Galinstan thermometers have a silvercolored line, but will be marked mercury free when you buy one. Geratherm mercuryfree oral thermometer at walgreens. A glass thermometer containing mercury that indicates the temperature being measured. Etsy is the home to thousands of handmade, vintage, and oneofakind products and gifts related to your search. A childs temperature can also show if an infection is responding to medicine the child may be taking. The strange shape takes some getting used to but it works great so far. Kinds of glass thermometers not recommended glass mercury thermometers are no longer recommended and can be dangerous. Get the best deals for glass mercury thermometer at.
Suitable for children, especially infants and babies who cant hold a thermometer in their mouths. Thermcos precision liquid in glass thermometers are manufactured with the finest glass manufactured under iso2001 guidelines. Traditional mercury lig thermometers are defined in detail in astm specification e 1, specification for astm liquidinglass thermometers. There are several types of thermometer including the mercury inglass or the alcohol inglass thermometer, shown in the diagram below. It is used almost everywhere, and its principle of operation is very simple. Daniel fahrenheits mercury in glass 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. However, like all thermometers, liquid inglass thermometers are subject to drift as a function of time and maximum temperature of use. In these cases, it is important to use the thermometer as described in the test procedure, even if it is technically incorrect. Pycnometer bottles are provided with nonmercury, redspirit filled thermometers for facilities that are designated mercuryfree. If your child becomes ill or is going to have surgery, the doctor will need to know the temperature. Liquid in glass thermometer thermometer mercury element. Thats why we keep plenty of these on hand, and so should you.
Although it is normally an instrument of only moderate accuracy, the very best of them, when used with sufficient attention to detail, have. It is a bulb containing mercury attached to a glass tube of narrow diameter. Sunroad fr500 multifunction lcd digital altimeter barometer compass thermometer hygrometer weather forecast led torch. The delicate glass has a high risk for breaking, and the environmental protection agency recommends discarding these devices at recycling centers certified to accept mercury waste 6 7. Userfriendly guidance on the replacement of mercury thermometers. A wide variety of mercury in glass thermometer options are available to you, there are 1,482 suppliers who sells mercury in glass thermometer on, mainly located in asia. Diagnostic accuracy of digital thermometer compared to mercury in glass thermometer for measuring temperature in children. Selene river press is a publishing company specializing in holistic nutrition education. Pdf assessment of temperature variation between automated. 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. Every glass thermometer has subtle variations in the size and shape of.
Gregory strouse, dawn cross, wyatt miller and dean ripple national institute of standards and technology gaithersburg, md 20899. And 2 by the time i need a thermometer once or twice a year the battery in the digital thermometer is dead. Mercury in glass thermometer safety data sheet effective. Mercury thermometers can be used to determine body, liquid, and vapor temperature.
A mercuryinglass thermometer, also known as a mercury. There are two kinds of glass thermometers, one with mercury and one without mercury. Liquid inglass thermometers are pervasive throughout industry. Mercury in glass thermometer safety data sheet effective date. For the most part, mercury thermometers require only an initial calibration, and this was the role nist, until today, played. P314 get medical adviceattention if you feel unwell. In a thermometer, a glass bulb attached to a glass capillary tube is filled with mercury. Despite great strides in the reduction of mercury use in health and home applications.
Maximum selfregistering mercuryinglass clinical thermometers are no longer. What to do if a mercury thermometer breaks 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. Like all temperature measuring devices, a liquidinglass. Glass thermometer an overview sciencedirect topics. Mercury is toxic if inhaled or if the liquid touches the skin. Mercury glass thermometer stock photos download 2,262. 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.
Mercury thermometer safety data sheet according to federal register vol. The rectal thermometer is handy, provided with a short probe and is used for measuring rectal temperatures. This type is the oldest and most common kind of thermometer. The bimetal thermometer employs a bimetal strip in the form of helix, it works on the principle of thermal expansion two metals having different coefficient of expansions are joined together to form a bimetal. Liquidinglass thermometry even though the liquidinglass thermometer is used much less frequently today than formerly, it is still a very commonly used device. The volume of mercury in the tube is much less than the volume in the bulb. Stem glass capillary tube through which the mercury or organic liquid fluctuates with. Duanlin adult baby measurement body temperature wide screen household no mercury glass thermometer mischmetal thermometer. The uses of mercury in glass thermometers sciencing. Replacing mercury thermometers with digital thermometers.
Pdf diagnostic accuracy of digital thermometer compared. Download and print out this handy pdf guide both printed and downloadable instructions come with each order. Having mercury in glass construction, these thermometers are designated to be the most accurate ones. Pdf the various method used to measure body temperature has both advantages and disadvantages including the age old mercuryinglass thermometers. But unlike mercury inglass thermometer, the contents of. Mercury thermometer, mercury fever thermometers, buy. Happinter 1pcs triangular glass thermometer for adult or baby, armpit and oral thermometers for fever test. Mercury thermometers have been around for quite some time. Bottles are designed with a special, medium length standard taper 1018 joint and are retested for accuracy within 0. The dangers of mercury thermometers chester county, pa. Incorporates altimeter, barometer, compass functions, etc. Nowadays, the triple point of water is used instead the triple point occurs at 273. Thermcos astm certified thermometers use astm methods in the calibration of these instruments and are outlined in astm e1 14 standard specification for astm liquid inglass thermometers astm e77 14 standard test method for inspection and verification of thermometers. Some published test methods specify use of mercury in glass thermometers, but many of these standards are being revised to avoid problems related to its use.
These thermometers provide a convenient method for measuring temperature over a broad range of applications with reasonable stability and accuracy. A procedure for the effective recalibration of liquid inglass thermometers author. A procedure for the effective recalibration of liquidin. The mercury expands or contracts with change in temperature. Alcoholfilled and galinstan glass thermometers are harder to find in regular grocery stores. Even canned pet foods are regulated by the code of federal regulations, a document that anderson helped amend several years ago to allow digital alternatives to the mercury in glass mig thermometers that were originally specified as the only alternative for monitoring the retort process. Iso17025 astm certified liquidinglass mercury thermometers, thermco products thermometers glass thermometers glass thermometers for special applications these high precision liquidinglass mercury thermometers are hand blown, which bear graduations, numbers and letters etched into the glass and filled with and inert gas above the mercury column. Ptac 3260 instrumentation chapter 5 test flashcards. Accurate body temperature readings can make a difference in treatment decisions. The basic concept of each different type of thermometer is the same, but the style differs. Mercury vapors and oxides generated during fires involving the product are toxic. I decided to try this geratherm mercury free oral glass thermometer while looking online for some temperature taking device that had at least some degree of accuracy. Ydingzui temperature, triangular glass thermometer 3542 c armpit oral household items for home. Iso17025 astm certified liquidinglass mercury thermometers.