02.08.2020

disadvantages of mercury thermometer

Show references. For accurate measurement of body temperature, each degree on the scale is composed of 10 divisions 0.1 degrees Celsius.The principal difference medical thermometer from ordinary mercury thermometers for measuring ambient temperature is the junction of the reservoir and the mercury capillary tube is specially curved and slightly narrowed, which in turn impedes the movement of mercury in the opposite direction.To return the thermometer to the initial position for the purpose of further application and temperature measurement, it is necessary to shake the “thermometer”, recovering the mercury back into the reservoir.Due to this specific property, in normal conditions, for example at room temperature, mercury is an easily mobile liquid, which in mild shock is divided into small balls, and when combining easily connected again in a solid ball.Another property of mercury is that it starts to evaporate at the temperature of +18°C and above.If the room or apartment broke mercury thermometer, the mercury after impact into many small droplets and is distributed throughout the room.
Mercury is highly toxic, and tends to remain in the environment.
Mercury in its liquid form has traditionally been used because of its fluid properties of separation and adherence through temperature extremes. Mercury thermometers are inexpensive, durable and accurate. The disadvantage is that they get damaged easily if dropped and the battery powering them eventually runs out. Disadvantages of a Mercury Thermometer: it took a Long time to measure the body temperature. When choosing digital, you avoid the mercury risk of other thermometer types. Mercury is especially … 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. However, in a gaseous state, as organomercuric compounds or as inorganic salts, it becomes a deadly toxin. On average, the temperature measurement should continue for at least 5-6 minutes, and for the most accurate measuring is required a weight of 10 minutes.

Then the mercury that is actively evaporating, pollutes and poisons all the air in the room.If a person breathes this air constantly, over time the mercury begins to accumulate in the body, which in turn leads to chronic mercury intoxication, which may include a metallic taste in the mouth, headaches, diarrhea, kidney damage, stomatitis, salivation, anemia, dermatitis, tremor of the limbs.Before each measurement of body temperature, check the thermometer, examined it carefully. According to Medicinenet.com, all birds and mammals are threatened by death, reduced reproduction, slower growth, delayed development and abnormal behaviour as a result of a diet high in contaminated seafood.Alcohol thermometers are also inexpensive and durable. Advantages & Disadvantages of Mercury Thermometers. It is the presence of mercury (about 2 grams) – hazardous substances for … Mercury is especially harmful to foetuses, infants and children.The metallic mercury in thermometers, if introduced into the environment in a non-controlled manner, can eventually enter the water ecosystem, where microorganisms break it down to methylmercury components. less hazardous. However, they present many safety and environmental hazards. He holds a Bachelor of Science in chemistry from the University of Wisconsin and a Master of Business Administration from Lake Forest. Thermister-based or “metal thermometers” are recommended in these applications, which do not utilise any liquid for temperature measurement.Broken alcohol thermometers can be disposed of in an ordinary fashion, being careful of any broken glass.Mercury thermometers should never be accessible by infants or children.A broken mercury thermometer should be handled as an emergency situation requiring immediate attention. If the reading on a mercury column exceeds 35 C, you need to shake the thermometer.In any case, do not use a vacuum cleaner for cleaning dust. jitendrabarange143 Helping Hand; Answer: Advantages * too dense * has low vapour pressure * doesn't evaporate easily. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. The measurement range of the scale from 34 to 42 degrees Celsius.

Close jar with tight lid mercury, that mercury vapor is not left outside. Rate! When something changes temperature, it shrinks or expands in all three dimensions. The mercury can easily penetrate into the pile of carpets, in cracks of floors, in the gap between the baseboard and the floor. At one end of the tube is a reservoir of mercury. This means that disposal was a serious problem, especially in the case of breakage. The U.S. Environmental Protection Agency has excellent instructions on how to handle a broken mercury thermometer situation available online.Ken Appelt is a senior sales and marketing executive with experience that includes product design, research, production, quality assurance, distribution and education. He has been writing and publishing articles in since 1982, mainly in healthcare, medical device and scientific periodicals. It is used (although with less and less frequency) in batteries, in thermometers, in fluorescent lights, in vaccines (although since 2003, primarily vaccines being used in Third World countries), in dental amalgam ("silver fillings"), and in the manufacture of chlorine and caustic soda. In no case can not throw mercury in the trash, in the garbage disposal or the toilet. For measuring temperature there is special scale. It is identified by its familiar silver metallic colour. Metallic mercury in its liquid state is relatively harmless when confined. The manufacturer calibrates and marks the thermometer so the top of the fluid column (meniscus) indicates an accurate temperature reading.Mercury thermometers are inexpensive, durable and accurate.

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