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  2. Hygrometer - Wikipedia

    en.wikipedia.org/wiki/Hygrometer

    A hygrometer is an instrument which measures the humidity of air or some other gas: that is, how much of it is water vapor. [1] Humidity measurement instruments usually rely on measurements of some other quantities such as temperature, pressure, mass, and mechanical or electrical changes in a substance as moisture is absorbed.

  3. List of weather instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_weather_instruments

    Hygrometer for measuring humidity; Anemometer for measuring wind speed; Pyranometer for measuring solar radiation; Rain gauge for measuring liquid precipitation over a set period of time; Wind sock for measuring general wind speed and wind direction; Wind vane (also called a weather vane or a weathercock) for showing the wind direction

  4. Hydrometer - Wikipedia

    en.wikipedia.org/wiki/Hydrometer

    A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity .

  5. Meteorological instrumentation - Wikipedia

    en.wikipedia.org/wiki/Meteorological_instrumentation

    In 1783, the first hair hygrometer is demonstrated by Horace-Bénédict de Saussure. In 1806, Francis Beaufort introduced his system for classifying wind speeds . [ 4 ] The April 1960 launch of the first successful weather satellite, TIROS-1 , marked the beginning of the age where weather information became available globally.

  6. Range of motion - Wikipedia

    en.wikipedia.org/wiki/Range_of_motion

    Range of motion (or ROM) is the linear or angular distance that a moving object may normally travel while properly attached to another.. In biomechanics and strength training, ROM refers to the angular distance and direction a joint can move between the flexed position and the extended position. [1]

  7. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    hydrometer: specific gravity of liquids (density of liquids) hygrometer: humidity inclinometer: angle of a slope inkometer: ink interferometer: wave interference infrared thermometer: heat radiated katharometer: composition of gases lactometer: specific gravity of milk light meter: light (in photography) linear position transducer: speed of ...

  8. Humidity - Wikipedia

    en.wikipedia.org/wiki/Humidity

    A hygrothermograph for humidity and temperature recording Hygrometer for domestic use, wet/dry psychrometer type Thermo hygrometer displaying temperature and relative humidity. A device used to measure humidity of air is called a psychrometer or hygrometer. A humidistat is a humidity-triggered switch, often used to control a humidifier or a ...

  9. Water activity - Wikipedia

    en.wikipedia.org/wiki/Water_activity

    Capacitance hygrometers are not affected by most volatile chemicals and can be much smaller than other alternative sensors. They do not require cleaning, but are less accurate than dew point hygrometers (+/- 0.015 a w). They should have regular calibration checks and can be affected by residual water in the polymer membrane (hysteresis).

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