DICTIONARY.COM The temperature of an object or substance refers to how hot or cold it is. ter. Nonetheless, all the gases behave similarly. For high-temperature applications the tube is filled with a pressurized gas before sealing to prevent the mercury from boiling. A thermometer in which the change of volume or pressure of a column of gas is used to measure temperature. © 2003-2012 Princeton University, Farlex Inc. Bimetal (bimetallic) This is a mechanic type that works with a bimetal strip. It consists of a bulb connected by a capillary tube to a manometer.The bulb is filled with a gas such that the volume of the gas in the bulb remains constant. air thermometer. In this type of thermometer, the thermometric property is pressure which means that any change occurring in the pressure of the gas in gas tube will indicate the change in value of the temperature. a thermometer filled with dry air or a gas, the expansion or increased pressure of which indicates the degree of heat; used to measure high temperatures. The thermometer is a device used to check the temperature of an object. It is measured in degrees or Fahrenheit, usually. A thermometer is a device that is used to measure the temperature of a body. Gas Thermometer Definition. Freebase (0.00 / 0 votes) Rate this definition: Gas thermometer. Gas thermometer definition: a device for measuring temperature by observing the pressure of gas at a constant volume... | Meaning, pronunciation, translations and examples All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Also known as constant-volume gas thermometer. Farlex Partner Medical Dictionary © … The gas thermometer is a device that measures the temperature by taking the count of variation in volume or pressure of a gas enclosed in a constant volume tube. It is measured in degrees or Fahrenheit, usually. https://www.thefreedictionary.com/Gas+thermometry, (General Physics) a device for measuring temperature by observing the pressure of gas at a constant volume or the volume of a gas kept at a constant pressure, Therefore, non-intrusive optical and laser-based methods have been developed for in-cylinder, An alternative technique using dielectric constant, (24) described their data obtained by dielectric-constant, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, In-Cylinder Temperature Measurements Using Laser Induced Grating Spectroscopy and Two-Colour PLIF, The NIST Johnson Noise Thermometry System for the Determination of the Boltzmann Constant, Improved first-principles calculation of the third virial coefficient of helium. A thermometer contains two essential elements: a … Definition of thermometry : the measurement of temperature Examples of thermometry in a Sentence Recent Examples on the Web The newly bright prospects for ocean acoustic thermometry are also a validation for Munk, who was deeply saddened when his global acoustic dreams were muted, Cornuelle says. Can you spell these 10 commonly misspelled words? We know that a hot object has a high temperature, and a cold object has a low temperature. All Free. Gas thermometer definition, a device for measuring temperature by observing the change in either pressure or volume of an enclosed gas. Based on WordNet 3.0, Farlex clipart collection. A Liquid-in-Glass Thermometer is a glass capillary tube having a liquid-filled bulb present at one end. thermometer- measuring instrument for measuring temperature. What made you want to look up gas thermometer? In making a liquid thermometer, the mercury is ordinarily driven to the top of the tube by heating. It consists of a bulb connected by a capillary tube to a manometer. Please tell us where you read or heard it (including the quote, if possible). Acoustic thermometry exploits the fact that the speed of sound in a gas is directly related to the average speed of molecular motion. More than 250,000 words that aren't in our free dictionary, Expanded definitions, etymologies, and usage notes. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! gas thermometer- thermometer that measures temperature by changes in the pressure of a gas kept at constant volume. Acoustic thermometry. Definition of gas thermometer in English: gas thermometer. 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. Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014. A thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object). The change in pressure is used to indicate a change in temperature. A gas thermometer measures temperature by the variation in volume or pressure of a gas. The constant-volume gas thermometer – it contains a gas; when the temperature rises, the pressure increases. A constant volume gas thermometer is composed of a bulb filled with a fixed amount of a dilute gas that is attached to a mercury manometer. A thermometer in which the change of volume or pressure of a column of gas is used to measure temperature. One common apparatus is a constant volume thermometer. A gas thermometer can be filled with any gas, but the most popular option is hydrogen. Farlex Partner Medical Dictionary © … The range of a thermometer is the difference between the maximum and minimum temperatures that the thermometer can read. Overview of Gas Thermometer. Resistance Thermometer Definition – The resistance thermometer or resistance temperature detector (RTD) uses the resistance of electrical conductor for measuring the temperature.The resistance of the conductor varies with the time.This property of the conductor is used for measuring the temperature.The main function of the RTD is to give a positive change in resistance … Start your free trial today and get unlimited access to America's largest dictionary, with: “Gas thermometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gas%20thermometer. Bimetal means that it is made of two metals. ter. A gas thermometer measures temperature by the variation in volume or pressure of a gas. See more. Common types of thermometers are Medical thermometers, Infrared thermometers, Mercury thermometers, thermocouple thermometers, laboratory thermometers, Bimetallic strip thermometers, Pyrometers, etc. Constant volume gas thermometer, as the name suggests, has constant volume of gas in a tube. an instrument used to measure temperature, esp one in which a thin column of liquid, such as mercury, expands and contracts within a graduated sealed tube See also clinical thermometer, gas thermometer, resistance thermometer, thermocouple, pyrometer Interpolating Constant-Volume Gas Thermometry 4 / 16 1. Background information on absolute constant-volume gas thermometry can be We've heard the TV meteorologist give the daily value of the temperature of the atmosphere (15 degrees Celsius, for example). Temperature measurement is important to a wide range of activities, including manufacturing, scientific research, and medical practice. Origin Mid 19th century; earliest use found in The Penny Cyclopaedia. Origin. A manometer is a device used to measure pressure. Thermometry is the science and practice of temperature measurement. This type works best with very low temperatures. Accessed 9 Jan. 2021. A gas thermometer is a thermometer that measures temperature by the variation in volume or pressure of a gas. These relationships would, in turn, be, approximately, valid for all the gases. You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary. n. (General Physics) a device for measuring temperature by observing the pressure of gas at a constant volume or the volume of a gas kept at a constant pressure. An important property of any gas is temperature.We have some experience with temperature that we don't have with properties like viscosity and compressibility. This branch of measurement of the temperature of a substance is called thermometry. Any measurable change in a thermometric probe (e.g. The invention of the thermometer is generally credited to Galileo. Also shown is the equipment for the four temperature baths Pressure is the force per unit area that the gas molecules exert on the container as they Mid 19th century; earliest … 4. See synonyms for gas thermometer. Post the Definition of gas thermometer to Facebook, Share the Definition of gas thermometer on Twitter, Words From 1921: 100 Years Old and Still Around. Introduction In the range 3 K to the triple point of neon (~ 24.6 K), the ITS-90 is defined in terms of a 3He or 4He constant-volume gas thermometer, CVGT, calibrated at three temperatures. So, a thermometer is a scientific tool for measuring temperature. gas thermometer - WordReference English dictionary, questions, discussion and forums. Calorimetry also means the measurement of heat but in joules. So, by accurately measuring the speed of sound in a gas of known molecular mass it is possible to work out the average speed of molecular motion and hence the temperature of the gas. Thermometer, instrument for measuring the temperature of a system. gas thermometer. noun historical Physics . The height of the mercury in the first column is set to a reference point or pressure P that it must stay at, while the mercury in the r… Calorimetry also means the measurement of heat but in joules. If we could use an ideal gas in our ideal-gas thermometer, we could be confident that we had a rigorous operational definition of temperature. The gas laws were developed in the late 1800s when the scientists understood the relationship between the pressure, volume, and temperature for a sample of gas. 1.2.2 Gas Thermometer Shown in Figure 1.1 is the gas thermometer which consists of a hollow spherical tank filled with helium and connected to an absolute pressure gauge. 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