meterological instruments

1. College of Agriculture BZU,SUB CAMPUS LAYYAH
Measurement and estimation of different
environmental variables
Presented to:
Dr Sami Ullah
Presented by:
Tanveer Abbas

2. Slide Title
• Climatic factors
• Pyranometer
• lux meter
• Rain gauge
• Anemometer
• Hygrometer
• Thermometer
• Barometer
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5. Climatic factors
• Weather conditions are determined
by six major factors:
• Air temperature
• Air pressure
• Humidity of the air
• Amount and kind of cloud cover
• Amount and kind of precipitation
• Speed and direction of the wind
• Solar radiation
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7. MEASUREMENT AND ESTIMATION OF
DIFFERENT CLIMATIC VARIABLES
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8. • A pyranometer is a device used to measure the
amount of irradiance that reaches the earth's
surface.
Pyranometer
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10. Rain gauge
• A device for collecting and measuring the amount of
rain which falls.
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12. lux meter
• A lux meter works by making use of a photo cell to
capture light. The lux meter then converts this light
to an electrical current stream, and after measuring
this current, allows the device to calculate
the lux value of the light it has captured
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14. Anemometer
• An anemometer is a device used for measuring wind
speed and direction. It is also a common weather
station instrument. The term is derived from the
Greek word anemos, which means wind, and is used
to describe any wind speed instrument used in
meteorology.
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16. Hygrometer
• A hygrometer is a meteorological instrument that is
used to measure the humidity of the air. A common
way these devices work is by using a material that
attracts moisture. This material changes depending
on how hydrated it is. A hygrometer has two bulbs:
one wet and one dry.
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18. Thermometer
• A thermometer is a device that measures
temperature or a temperature gradient. A
thermometer has two important elements: a
temperature sensor in which some change occurs
with a change in temperature; and some means of
converting this change into a numerical value
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20. Barometer
• A barometer is a scientific instrument that is used to
measure air pressure in a certain environment.
Pressure tendency can forecast short term changes in
the weather.
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