The thermometer should be held at eye level to make reading easier. Factors that increase range would at the same time reduce its sensitivity. The following are the properties of alcohol for thermometers: To check if a thermometer is accurate, we need to insert the stem of the thermometer in the ice water such that the stem is at least an inch deep without touching the glass. Checking the body temperature using the inside of the ear is known as tympanic membrane temperature. Thermometers such as mercury thermometers, alcohol in glass thermometer, constant pressure gas thermometers, and platinum resistance thermometers are designed on the basis of technology. thanks1. Hence, the clinical thermometers have the range 35˚C to 42˚C. The range can be increased by lengthening the bore. We note the value of the bigger mark that the mercury thread has crossed (which is 98 in the Fig.4 Example 1). The thermometer is washed with water at a normal temperature. For example, there is one set of thermometers that are used to measure body temperature while another set of thermometers to measure boiling point and freezing point during experiments. Your email address will not be published. Laboratory thermometers. The range of a laboratory thermometer is generally from - 20 o C (Fig-3). You can use a laboratory thermometer for checking the temperature of a solvent but not a clinical one. Gr8 help…seriously..^-^.. Wait for a minute or less so that the thermometer registers the reading of the ice water. The International Temperature Scale of 1990 … Registering thermometers are designed to hold the temperature indefinitely, so that the thermometer can be removed and read at a later time or in a more convenient place. A laboratory thermometer is recognizable by its long stem with a silver bulb at the end. Sorry, your blog cannot share posts by email. 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They are easy to use, inexpensive, and accurate. Fig-3. Facts about Laboratory Thermometer 6: the today’s scale. Your email address will not be published. Watch the video below to understand the effect of temperature on matters surrounding us. The laboratory thermometers should have an agreed scale if you want to have all read the similar temperature. If you spot any errors or want to suggest improvements, please contact us. Notify me of follow-up comments by email. Because of their construction, and their expense, it is important to know how to properly use a lab thermometer without breaking it. Made with | 2010 - 2020 | Mini Physics |. 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