A few of the indirect measurements of temperature are given below. 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. Questions about Mercury Thermometer Alternatives? An ideal thermometer shall have an infinite temperature range. The range of a thermometer, on the other hand, refers to the dissimilarity between the maximum and the minimum temperature. Other properties used to measure temperature include electrical resistance, color, and the emission of infrared radiation (Figure \(\PageIndex{1}\)). Basal temperature thermometers (used to track slight changes in body temperature), containing about 2.25 grams of mercury Is There Mercury in My Thermometer? Some liquids possess high expansion coefficients relatively over useful temperature ranges, thereby forming the basis for a mercury or alcohol thermometer. Mercury is bad for your health, as well as for the water, wildlife, and waste systems on earth. These can be liquid filled (operating in the range 200–670 K) or gas filled (operating in the range 4–1050 K). Purchase cost-effective and accurate mercury thermometer temperature range at Alibaba.com. Find Clinical Mercury Thermometer, Manual Thermometer for checking fever or body temperature online for sale at best price. The net voltage difference will be proportional to the magnitude of the temperature gradient, customarily in the range of a few microvolts per degree, and that voltage is converted to a temperature by the thermometer electronics. Some need to put on a disposable "hat," some do not need it. alttherm@nist.gov. Sensitivity, Linearity, Responsiveness of clinical thermometers are the same as that of laboratory thermometers. It is most medical organizations use ear thermometers to take the temperature in place of the mercury thermometer. Though once very common, the usage of this kind of thermometer is now being discouraged due the risk of mercury-exposure. Causes of Mercury used in Thermometer – Mercury thermometers can be used to decide the body, liquid, and vapor temperature. The mercury thread needs to be shaken back into the bulb before the thermometer is used again. Mercury Thermometer is actually a thermometer in a glass tube. Get contact details of Mercury Thermometer manufacturers & … The tip of the thermometer is simply inserted into the ear canal and the measurement result provided in just one second! Place probe in a water bath and enjoy digital resolution to 0.1° and… Don’t use a mercury thermometer, which can be dangerous if it breaks. The normal ear temperature range is approximately between 35.5 °C and 37.7 °C. Some thermometers are designed with very low ranges (for example, ASTM 62C, a common certified reference thermometer, has a range of -38 to +2 °C) such that the mercury at room temperature resides in an oversized expansion chamber at the extreme top of the instrument. An ideal thermometer shall have an infinite temperature range. I don´t know the real limits, but one of mine goes from -40C to 300C so at least that is possible, and I think that is more then enough. However, forehead thermometers are a lot more advanced than that and are able to get the temperature of a person without ever touching their skin which is why they’re often referred to as non-contact thermometers. It has linear expansion property and has a temperature range of -35°C to +500 °C(with compressed nitrogen). Range: The scale ranges between 35°C to 42°C. Mercury-in-glass thermometers generally have one of three different tips: Slim (oral or axillary) tip, the short-rounded tip (also known as stubby), and the pear-shaped (rectal) tip 1 ( Fig. The electronic medical thermometer is the technologically advanced measurement option available over mercury-based thermometers to measure body temperature. The mercury in the reservoir expands with increased temperature, climbing higher up the thermometer, and it contracts and recedes as the temperature falls. If the thermometer breaks, the mercury may be breathed in or absorbed (soaked) into your skin. If a glass thermometer breaks while checking an oral temperature, the mercury may be swallowed. It works on the principle: ΔL α ΔT An exception is on the high end of the temperature scale. Thermometers are typically constructed of a hollow glass tube with a reservoir at one end to hold a liquid, which is sensitive to temperature fluctuations within a specific range. Mercury Thermometer (also known as mercury-in-glass thermometer) was invented by German physicist Daniel Gabriel Fahrenheit in 1714. It consists of a bulb containing mercury attached to a glass tube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb. …is 1-1/8 ounce Range from “brrr” to blistering Range is –58 to 572°F and –50 to 300°C.Wide temperature span combines the ranges of more than 90 different mercury thermometers. According to the EPA 2, nonmercury PRTs are as accurate as mercury-containing thermometers through a wide temperature range. Until recently 260° C was the typical limit for non-mercury thermometers. The mercury-in-glass or mercury thermometer was invented by physicist Daniel Gabriel Fahrenheit in Amsterdam (1714). Ltd, ... mounting: see mercury in steel thermometers specification column ranges (ºc): -10 +65 ºc, 0-65, 100, 120, 150, 200, 260, 300, 340 ºc. 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