study Plus, get practice tests, quizzes, and personalized coaching to help you By definition, the temperature is the measurable extent of hotness or coldness. Checking the body temperature using the inside of the ear is known as tympanic membrane temperature. The uses of thermometers are extremely varied. The modern mercury thermometer was invented by Fahrenheit. Mercury is in a liquid state at room temperature and has the highest coefficient of expansion. 294 lessons Therefore, these thermal systems are normally used near the upper end of their range, and an accuracy of 1% or better can be expected. Liquid crystals have the properties of both liquids and solids. Wait for a minute or less so that the thermometer registers the reading of the ice water. The silver color on the laboratory thermometer at the bulb normally indicates the presence of mercury. Infrared thermometer captures the temperature in the form of infrared energy given off by the heat source. Air Conditioning Repair Schools and Colleges in the U.S. The answer to that is temperature. Then the number of the division of the mercury thread has crossed is noted (3 in this case). You can use a laboratory thermometer for checking the temperature of a solvent but not a clinical one. Turn on the thermometer and click till the number zero appears on the display. To unlock this lesson you must be a Member. Digital thermometers can be considered to be advanced thermometers that are used for measuring body temperature. Services. You use one when you want to know how hot or cold it is outside (even if you don't take this measurement yourself, someone else does and sends the information to news outlets and the weather application on your phone). Thermometers may be analogue, as in the case of the common mercury expansion thermometer or colour-change devices, or may have a digital display. © copyright 2003-2020 This type of thermometer has a bourdon tube connected by a capillary tube to a hollow bulb. thermometer A device for registering body temperature. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. An instrument for indicating temperature of any substance; often sealed vacuum tube containing mercury, which expands with heat and contracts with cold, its level accordingly rising or falling in the tube, with exact degree of variation of level being indicated by a scale, or, today, a device with an electronic sensor that displays temperature without use of mercury. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. | 1 - Definition, Types & Uses, Chromatography, Distillation and Filtration: Methods of Separating Mixtures, Force, Area & Pressure: Relationship & Applications, Bernoulli's Principle: Definition and Examples, M-STEP Science - Grade 11: Test Prep & Practice, WBJEEM (West Bengal Joint Entrance Exam): Test Prep & Syllabus, NY Regents Exam - Living Environment: Help and Review, UExcel Anatomy & Physiology: Study Guide & Test Prep, Holt Physical Science: Online Textbook Help. It is developed for measuring the human body temperature. This filled-system thermometer utilizes the vapor pressure of certain stable liquids to measure temperature. The Lab Depot has the best selection of lab equipment. We use a device called thermometer to measure the temperature of any object. A thermometer contains two essential elements: a sensor that detects a change in temperature and a device that communicates that temperature to the person reading it. Many thermometers are made using liquids. A clinician takes your body temperature when you have a doctor's appointment, and the thermostat in your home keeps a running tab on how hot or cold it is inside your house.

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