dry-and-wet bulb thermometers

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• dry- and wet-bulb hygrometer — An instrument to measure the dew point, relative humidity, and vapor pressure. It essentially consists of two ordinary, accurate, mercury thermometers. One has thin muslin wrapped around it and is kept wet; it is called a wet bulb thermometer.… …   Aviation dictionary

• Wet-bulb temperature — The wet bulb temperature is a type of temperature measurement that reflects the physical properties of a system with a mixture of a gas and a vapor, usually air and water vapor. Wet bulb temperature can have several technical meanings:… …   Wikipedia

• wet-and-dry-bulb thermometer — | ̷ ̷ ̷ ̷| ̷ ̷| ̷ ̷ noun : psychrometer * * * wet and dry bulb thermometer noun A hygrometer consisting of two thermometers, one with a dry bulb, the other with the bulb kept moist • • • Main Entry: ↑wet …   Useful english dictionary

• wet-and-dry-bulb hygrometer — noun A hygrometer consisting of two thermometers, the bulb of one of which is kept wet and shows a lower temperature; the relative humidity is obtained from the two temperatures using tables …   Wiktionary

• psychrometer — psychrometric /suy kreuh me trik/, psychrometrical, adj. /suy krom i teuhr/, n. an instrument for determining atmospheric humidity by the reading of two thermometers, the bulb of one being kept moist and ventilated. [1720 30; PSYCHRO + METER] * * …   Universalium

• Hygrometer — Not to be confused with hydrometer. A hygrometer (UK: /haɪˈɡrɒmɪtə/) is an instrument used for measuring the moisture content in the environmental air, or humidity. Most measurement devices usually rely on measurements of some other quantity …   Wikipedia

• Psychrometrics — or psychrometry are terms used to describe the field of engineering concerned with the determination of physical and thermodynamic properties of gas vapor mixtures. The term derives from the Greek psuchron (ψυχρόν) (… …   Wikipedia

• Temperature — This article is about the thermodynamic property. For other uses, see Temperature (disambiguation). A map of global long term monthly average surface air temperatures i …   Wikipedia

• psychrometer — A device for measuring the humidity of the atmosphere by the difference in temperature between two thermometers, the bulb of one kept moist, the other dry. Evaporation from the moist bulb lowers the reading of that thermometer; the greater the… …   Medical dictionary

• hygrometer — /huy grom i teuhr/, n. any instrument for measuring the water vapor content of the atmosphere. [1660 70; HYGRO + METER] * * * ▪ meteorological instrument       instrument used in meteorological science to measure the humidity, or amount of water… …   Universalium

• Sea surface temperature — Weekly average sea surface temperature for the World Ocean during the first week of February 2011, during a period of La Niña …   Wikipedia