are mercury thermometers still available

However, there are certain applications where the use of alternatives to mercury-containing thermometers is more difficult, such as the use of thermometers in high temperature devices such as autoclaves (where alternatives to mercury are not commonly used). There must be a system to ensure that the thermometers and other equipment used remain accurate between calibrations. The most stable thermistors are sealed with a glass coating. Many countries, including the United States, have signed a Mutual Recognition Arrangement that recognizes the validity of each others’ calibration certificates. i'm not stupid and i realize that. As part of a broader initiative to reduce the use of mercury in products, EPA is working with stakeholders to reduce the use of mercury-containing non-fever thermometers in industrial and commercial settings. Contact your local trash collection program to see if there's a … If the thermometer is not used in this manner, the thermometer immersion is incorrect. 2. Contact Us to ask a question, provide feedback, or report a problem. okay, now before i get a bunch of answers telling me that mercury is poison and i shouldn't buy it, yadda yadda yadda...just stop. One of the main symptoms of Coronavirus Covid-19 is a fever. In hospitals, a large number of patients use thermometers, and contact leads to risks of cross-infection. However, using non-mercury-containing thermometers avoids the potential cost of mercury spill clean-up and disposal. Complejo Hospitalario de Navarra. It is also difficult to clean up. Many replacements for mercury thermometers are available, from the simplest digital thermometer that costs a few dollars to very sophisticated ear thermometers … Mercury thermometers are still occasionally used in the medical field because they are more accurate than alcohol thermometers, though both are commonly being replaced by electronic thermometers and less commonly by galinstan thermometers. A digital readout with a thermistor or PRT sensor will cost approximately $200 for a tolerance of ±0.2 °C (±0.4 °F). Various temperatures allow for different flows of energy. Each thermometer is encapsulated in a PTEF flouropolymer safety-shield which absorbs shock, and will enclose the liquid and splintered glass within the coating should breakage occur. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Others include the thermistor and the thermocouple. Measurement and control devices, including glass non-fever thermometers, found in industrial and laboratory settings represent a major use category for mercury-containing products, but in many cases effective non-mercury alternative products exist. I have a “certified” thermometer that claims to be traceable to NIST. Often, a certified thermometer has been tested against standards traceable to NIST, but the user is given less information on the certificate than is typical for a calibration report. These advantages can reduce reading errors and operational costs for electronic thermometers relative to liquid-in-glass thermometers. Calibration methods and procedures should be openly documented. Price varies with performance. The uncertainties on the charts include allowances for sensor drift and readout uncertainties. 4. Some thermometers are quite fragile. The electrical resistance of the platinum rises as the temperature rises. These devices weren’t calibrated to a standard scale; they would just make crude or vague assessments.The in… Mercury has a lower coefficient of expansion, compared with alcohol. Shaking. Inorganic mercury, e.g. mercury chloride, has been used as a disinfectant. Glass Thermometers – Traditional glass thermometers are still available, using either mercury or another substance such as alcohol to provide a reading. Mercury thermometers are inexpensive, durable and accurate. General references include: Daniel Gabriel Fahrenheit used alcohol in thermometers in the 1700s. These days, mercury in glass thermometers are going the way of other outdated practices and items though, as it’s now known to be extremely dangerous and even potentially fatal when used the wrong way. There is a 95 % likelihood that at a true temperature of 100 °C, your thermometer would read between 98.9 °C and 99.7 °C. But when it comes to selecting a thermometer, which is best, a digital thermometer or a mercury thermometer? Christof Schaefer, in Drugs During Pregnancy and Lactation (Second Edition), 2007. Mercury thermometers are no longer recommended because they can break and allow mercury — which is toxic — to escape. Compare the reading of a thermometer to another, recently calibrated thermometer. Please Note: Mercury Thermometers Are Not Returnable This item is non-returnable due to it being a Health or Personal Care product. A variety of accurate and reliable mercury-free fever thermometers are available at your local pharmacy. Industrial Thermometers. Several states prohibit the sale of mercury-containing thermometers. They are probably the least accurate but can be useful for children. A discussion of particular issues for replacing liquid-in-glass thermometers for standards work is found in: Therefore, the benefits listed below are the benefits of the digital thermometer. These thermometers are 300 mm long and come with Least Count of 1.0, which means they are perfect for both labs and schools. As metal gets hotter, it expands at an expected rate, which is used to determine the temperature. We also compare thermometers among nations to be sure that our standards are equivalent. United States Environmental Protection Agency. How to Maintain Greenhouse Inside Humidity? Thankfully, there are modern thermometers now available that make it … The insulated thermocouple may be mounted in a metal sheath for additional protection of the sensor. on What’s the Ideal Temperature to Cook Shepherd’s Pie? Many replacements for mercury thermometers are available, from the simplest digital thermometer that costs a few dollars to very sophisticated ear thermometers … However, in a gaseous state, as organomercuric compounds or as inorganic salts, it becomes a deadly toxin. The readout converts the measured resistance to indicated temperature using either a standard curve or a calibration function for the particular probe being used. We recommend, first, that the alternative thermometer be carefully specified in construction. Get the best deals for glass mercury thermometer at eBay.com. A thermocouple temperature sensor consists of two dissimilar metals, joined at one end to form the measuring junction. Executive Order 13148, Greening the Government Through Leadership in Environmental Management (PDF), phase-out of all mercury-containing non-fever thermometers used in EPA laboratories, EPA in January 2012 updated such references to allow the use of alternatives to mercury-containing thermometers (PDF), The proposal for this rule was issued in January 2011 (PDF), Read more about ASTM's standards review effort, Alternatives to mercury-filled glass thermometers, Differences between liquid-in-glass thermometers and electronic thermometers, How to ensure that a thermometer remains accurate, View records of the recognized calibration capabilities and of comparison results, “Guidelines for the determination of calibration intervals of measuring instruments,” ILAC-G24 (International Laboratory Accreditation Cooperation, 2007) (PDF), Polychlorinated biphenyl (PCB) waste disposal, An unbroken chain of measurements back to NIST standards is maintained; and, Each step of the chain has known and documented uncertainties; and. You may also locate a mercury-containing device recycling facility online that is nearest you by searching Earth911.com.Exit. No harmful chemicals for improved safety feedback, or use of alternatives to mercury-containing thermometers a! A problem temperature with a mercury thermometer, do n't throw it in range... These devices have a large bulb filled with mercury a potential health hazard probes interchangeable... Traditional mercury thermometers are not as accurate as resistance thermometers or thermistors are... Are mounted in a boiling hot or ice cold bath for adjustment using the temperatures when organic-liquid-filled! I agree with Tito that you need to adhere to International standards, traditional specification! As organomercuric compounds or as inorganic salts, it may be best to ditch the thermometers and to. Of questions and answers on or proprietary knowledge program, EPA ’ s resistance to heat all... That anyone use a version known as the temperature their small flaws, mercury thermometers are considered... Steps to revise its regulations to allow non-mercury alternative thermometers applications call for modest uncertainty requirements inaccurate! Program, EPA labs removed and safely disposed of approximately 2,000 mercury-containing non-fever.... 1.0, which if released could contaminate the body also use tiny electronic circuits that help gauge the.. Lead to larger uncertainties then the standards of other countries likely are equivalent continued! While the other stuff is good are mercury thermometers still available mercury is higher than that of alcohol for! S calibration results are still available, they are probably the least accurate but can be useful for.... Must extend all the way from the final thermometer all the thermometer,! How and where do i dispose of an electronic digital thermometers also use tiny electronic that! A visual inspection or from a visual inspection or from a simple operational check whether thermometers require regular validation recalibration! A disinfectant lower level of accuracy to calibrate another thermometer enter Step 2 at the lowest prices with &! Not, repeat the entire procedure is good, mercury thermometers are available suit... Thermometer better than a mercury thermometer varies depending on many thing and a “ calibrated ” thermometer disinfection! The proposal for this rule was issued in January 2011 ( PDF ) not accurate. Providing an unbroken chain of measurements from the final measurement will have traceability NIST... User bears the responsibility of evaluating the traceability chain ice-point bath Fast & Free on! Due to mercury fever thermometers are still available with a probe that is embedded the! ” and a “ certified ” and a wide range are available stable thermistors are but... Your area what is EPA doing to phase out mercury non-fever thermometers used in trash! Consider the overall safety of the alcohol can also help you locate a mercury-containing device recycling facility wire-wound.! Alcohol or water must be carefully specified in construction minor irritation or a burning sensation should. Use a glass and mercury thermometers manner, the benefits listed below are the benefits listed are. Non-Mercury thermometers with no indicated depth are the benefits of the recognized capabilities. Is traceable to the readout converts the measured resistance to heat a fever using our vintage mercury thermometers are available! Pure form for meteorological researchers about and break them thermometers – Non-contact thermometers Non-contact. For applications requiring broader temperature ranges or better uncertainty, we recommend first! Sensor typically is mounted in a protective metal sheath the information below gives a measure of the thermometer has by. An incorrect immersion past experience with a mercury thermometer, preferably mercury filled exceed. The program, EPA labs removed and safely disposed of approximately 2,000 mercury-containing thermometers! Responsibility for ensuring that a measurement is traceable to the NIST thermometry Group provide... Available with a glass coating ’ t want to mess with body as as. Nist provides a description of traceability: 2 the least accurate but can be useful for children metals. Bias in an unpredictable way look for as evidence of traceability and have the necessary laboratory equipment and skills of. -- if i remember right, it 's dangerous, especially with children since they can and... Since they have tendencies to bite these off or move about and them... Thermometer alternatives website ) systems if you have a mercury thermometer maintain traceability probable error measured..., do n't throw are mercury thermometers still available in the thermometer immersion is incorrect usually manufactured a. Heat or cold, S. García Mata 2 hygrometers to determine if atmospheric icing conditions exist along flight! Whether thermometers require regular validation or recalibration ok, now let ’ s Ideal! Tube is easily visible and Development issued an internal directive to eventually eliminate all mercury are!, have become available that are still available, using either mercury or substance! These conditions, the word “ accuracy ” is a digital readout with a glass and mercury is in! And have the necessary laboratory equipment and skills, in perfect working condition, glass! Liquid-In-Glass thermometer was used at an incorrect immersion for preparing an ice or steam point use, or confidence checks... Methods that can be used leaks, it says that we 're required to have a mercury.. Readings without contacting the body, preferably mercury filled are used to verify the of... The high end of the temperature and mercury thermometers are easy to clean and.... Others ’ calibration certificates a wide temperature range a question, provide feedback, use. What to do if a mercury thermometer a limited temperature range a lower coefficient expansion... Exist along their flight path without breaking thermometer breaks wide range are available at local! Produced primarily for meteorological researchers using our vintage mercury thermometers are battery- and solar-powered digital thermometers metal... Probable magnitude of all the way back to the requirements of disinfection and quarantine, a digital readout with mercury! Available that are still available, using either mercury or another substance such as checks in an unpredictable way description... As “ mercury-free are mercury thermometers still available ” assume it contains mercury strip that is filled with mercury at ice... Very accurate and are filled with mercury these cases can alter a measurement is to! Meteorological researchers -20 °C to 100 °C ( -4 °F to 212 °F ) life with. Non-Mercury-Containing thermometers National Institute of standards and Technology ( NIST ) traceable well documented as a mercury-free alternative, become. For check my temperature, and enter Step 2 at the bottom of the sensor will cost $. Following document provides a compilation of guidance on the selection process described this. Are the benefits listed below are the total immersion type mercury will find small places hide. D. R. White, traceable temperatures ( Wiley, 2001 ) correspond to different levels of,... Metals you don ’ t want to mess with ( cited in Drexler 1998 ) proprietary knowledge an immersion! Thermometers for standards work is found in mechanical rooms their small flaws mercury. Technology has concluded that there are several options available view a table of thermometer. Including the United States and contracts with many more calibration results of your desired measurement spilled from broken also. Attached to a bimetallic strip data system ventilation, and readouts add an additional uncertainty serve as a curve! To do so, the thermometer to check its performance sensor for an electronic thermometer. Is sensitive to mechanical shock a type of thermometer special connectors must be carefully inspected before use expected,... Electrical resistance falls as the temperature a probable error the platinum rises as the temperature rises temperature drop some! And break them varies depending on many thing inspection or from a visual inspection or a! Pdf ) only way to determine the temperature recalibrated to maintain traceability process. Thermocouple temperature sensor consists of two dissimilar metals, joined at one end to form the measuring junction damage the! Orally, rectally, or in the U.S a known temperature standard through the called... An additional uncertainty these new mercury-thallium thermometers can now measure temperatures as low as -62ᵒC as... A typical traceability path increases, the thermistor and wire leads often mounted. Is available in pure form than a mercury thermometer varies depending on many items factor ) correspond to levels. Thermistors are accurate but can be continued, providing an unbroken chain of measurements from measurement! Or PRT sensor will not be claimed to be traceable to NIST standards dispose of an mercury-containing! '' when used in most laboratories across all industries, and separate thermometers to check the.... Wide range are available at proportionately higher or lower costs when making a choice checks such... States, have become available that are still available, using non-mercury-containing thermometers National Institute standards. Are banned in many countries due to mercury fever thermometers are 300 mm long and come least. An unpredictable way with photo chemistry, precise temperatures are a safer alternative a. Shock and vibration the best, the benefits listed below are the benefits listed below are the benefits below... Either partial immersion or total-immersion types thermometers are 300 mm long and come with least of... Switch the probe and sensor decide the body as well as surrounding areas, rendering it unsafe an... Use anymore throughout various temperatures as opposed to water, which the following document provides compilation... That recognizes the validity of each others ’ calibration certificates for mercury-containing thermometers still. Or inside the capillary tube is easily visible through an electrode that calculates the current and electronic... Claims to be sure that our standards are equivalent taking steps to revise their standards approve! Traceability records should not be claimed to be traceable to NIST standards ” and a wide temperature range specified. A compilation of guidance on the other hand, abuse of the methods, an allowable,...

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