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. Acoustic thermometry. 'Nip it in the butt' or 'Nip it in the bud'? 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. This device is used for measuring temperature due to its accuracy and the fact that it does not require any other equipment except the human eye. 'All Intensive Purposes' or 'All Intents and Purposes'? Nonetheless, all the gases behave similarly. One common apparatus is a constant volume thermometer. 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. Acoustic thermometry exploits the fact that the speed of sound in a gas is directly related to the average speed of molecular motion. A gas thermometer measures temperature by the variation in volume or pressure of a gas. Thermometry is the science and practice of temperature measurement. gas thermometer - WordReference English dictionary, questions, discussion and forums. Common types of thermometers are Medical thermometers, Infrared thermometers, Mercury thermometers, thermocouple thermometers, laboratory thermometers, Bimetallic strip thermometers, Pyrometers, etc. ter. The range of a thermometer is the difference between the maximum and minimum temperatures that the thermometer can read. A thermometer in which the change of volume or pressure of a column of gas is used to measure temperature. 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. The thermometer is a device used to check the temperature of an object. We know that a hot object has a high temperature, and a cold object has a low temperature. 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. 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. 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. 4. Interpolating Constant-Volume Gas Thermometry 4 / 16 1. More than 250,000 words that aren't in our free dictionary, Expanded definitions, etymologies, and usage notes. 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). It consists of a bulb connected by a capillary tube to a manometer. Origin. Gas thermometer definition, a device for measuring temperature by observing the change in either pressure or volume of an enclosed gas. The thermometer is a device used to check the temperature of an object. air thermometer. A thermometer contains two essential elements: a … It is measured in degrees or Fahrenheit, usually. The invention of the thermometer is generally credited to Galileo. Definition of gas thermometer : a thermometer containing gas (as hydrogen) as the enclosed thermometric substance, variations in temperature being indicated by the change in pressure of a fixed quantity of gas required to maintain the gas at a constant volume or the change in volume of a fixed quantity of gas maintained at a constant pressure DICTIONARY.COM © 2003-2012 Princeton University, Farlex Inc. Delivered to your inbox! Gas thermometer definition: a device for measuring temperature by observing the pressure of gas at a constant volume... | Meaning, pronunciation, translations and examples The mercury manometer has a column partially filled with mercury that is connected to a flexible tube that has another partially filled column of mercury, called a reservoir, attached to the other end. A device to measure temperature by measuring the pressure exerted by a definite amount of gas enclosed in a constant volume; the gas (preferably hydrogen or helium) is enclosed in a glass or fused-quartz bulb connected to a mercury manometer. This type works best with very low temperatures. Thermometer, instrument for measuring the temperature of a system. Freebase (0.00 / 0 votes) Rate this definition: Gas thermometer. Any measurable change in a thermometric probe (e.g. Learn a new word every day. 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 change in pressure is used to indicate a change in temperature. Temperature measurement is important to a wide range of activities, including manufacturing, scientific research, and medical practice. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. A manometer is a device used to measure pressure. Farlex Partner Medical Dictionary © … Definition of gas thermometer in English: gas thermometer. ter. 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. See synonyms for gas thermometer. Bimetal (bimetallic) This is a mechanic type that works with a bimetal strip. gas thermometer. However, we note in Section 2.8 that any real gas will exhibit departures from ideal gas behavior if we make sufficiently accurate measurements. This branch of measurement of the temperature of a substance is called thermometry. See more. 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. A gas thermometer can be filled with any gas, but the most popular option is hydrogen. 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. thermometer- measuring instrument for measuring temperature. Based on WordNet 3.0, Farlex clipart collection. 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. What made you want to look up gas thermometer? 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. 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. 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 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 … All Free. The Gas Laws: Definition, Formula & Examples. Farlex Partner Medical Dictionary © … Thermometer - definition Thermometer is an instrument that measures the temperature of a system quantitatively.There are many types of thermometer available for example,liquid in glass thermometer,gas thermometer,resistance thermometer etc. A gas thermometer is a thermometer that measures temperature by the variation in volume or pressure of a gas. Calorimetry also means the measurement of heat but in joules. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! 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. A Liquid-in-Glass Thermometer is a glass capillary tube having a liquid-filled bulb present at one end. The temperature of an object or substance refers to how hot or cold it is. Gas Thermometer Definition. One common apparatus is a constant volume thermometer. For high-temperature applications the tube is filled with a pressurized gas before sealing to prevent the mercury from boiling. The constant-volume gas thermometer – it contains a gas; when the temperature rises, the pressure increases. Also known as constant-volume gas thermometer. Test Your Knowledge - and learn some interesting things along the way. In making a liquid thermometer, the mercury is ordinarily driven to the top of the tube by heating. 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… 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. Bimetal means that it is made of two metals. gas thermometer- thermometer that measures temperature by changes in the pressure of a gas kept at constant volume. Origin Mid 19th century; earliest use found in The Penny Cyclopaedia. the dilatation of a liquid in a capillary tube, variation of electrical resistance the A gas thermometer measures temperature by the variation in volume or pressure of a gas. So, a thermometer is a scientific tool for measuring temperature. It is measured in degrees or Fahrenheit, usually. Overview of Gas Thermometer. Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014. These relationships would, in turn, be, approximately, valid for all the gases. 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 … noun historical Physics . Calorimetry also means the measurement of heat but in joules. Accessed 9 Jan. 2021. 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. A thermometer in which the change of volume or pressure of a column of gas is used to measure temperature. The glass is then sealed off, resulting in a vacuum when the mercury contracts during cooling. This branch of measurement of the temperature of a substance is called thermometry. 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