Meteorological Instruments

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Meteorological Instruments
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Barometer
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Barometer

• Used to determine atmospheric pressure
• Two Types
• Aneroid Barometer - Expansion or contraction of
  the vacuum chamber, caused by a change in air
  pressure, forces the pointer to move.
• Mercurial Barometer It uses a long glass tube,
  open at one end and closed at the other. Air
  pressure is measured by observing the height of
  the column of mercury in the tube.

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Thermometer

• is a device that measures temperature or
  temperature gradient using a variety of different
  principles

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Hygrometer or Psychrometer

• Hygrometers are instruments used for measuring
  relative humidity. A simple form of a hygrometer
  is specifically known as a "psychrometer" and
  consists of two thermometers .
• Relative humidity is a term used to describe the
  amount of water vapor that exists in a gaseous
  mixture of air and water.

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Anemometer

• anemometer is a device for measuring wind speed,
  and is one instrument used in a weather station.

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Wind Vane

• A weather vane, also called a wind vane, is a
  movable device attached to an elevated object
  such as a roof for showing the direction of the
  wind. Very often these are in the shape of
  cockerels and are called weather cocks. Arrows
  are also popular, but a multitude of designs have
  been used.

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Prop Anemometer

• Helicoid propeller anemometer incorporating a
  wind vane for orientation.

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Quiz

• 1._____ Used to determine atmospheric pressure.
• 2._____ is a movable device attached to an
  elevated object such as a roof for showing the
  direction of the wind.
• 3._____ is a device for measuring wind speed

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Quiz

• 4._____ are instruments used for measuring
  relative humidity.
• 5._____ is a device that measures temperature or
  temperature gradient using a variety of different
  principles
• 6._____7._____Two(2) types of barometer.
• 8._____is a term used to describe the amount of
  water vapor that exists in a gaseous mixture of
  air and water.

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Identify the following pictures

• 9.

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Identify the following pictures

• 10.