Hand Anemometer  
The Hand Anemometer is a small portable instrument that gives a direct reading of wind speed.
The instrument is held up to the wind away from obstruction. A vertical spindle with three small plastic cups rotates on ball bearings at a rate proportional to the wind speed. A permanent annular (ring-shaped) magnet is affixed to the lower end of the spindle. As the spindle rotates, the rotation of the radial magnetic field induces currents in a metal cylinder inside the body of the instrument. The resultant deflection is approximately
  proportional to the wind speed. The speed is indicated by the position of two red pointers against a fixed scale engraved on the transparent outer casing of the instrument.  
  Sunshine Recorder  
The [Campbell-Stokes Pattern] Sunshine Recorder is used to measure the duration of sunshine, that is, the number of hours of sunshine per day.
The sunís rays are focused by a glass sphere to an intense spot which will char a mark on a curved, specially designed card mounted concentrically with the sphere. As the earth rotates, the position of the spot moves across the card leaving a measurable trace. Due to changing cloud cover or the occurrence of precipitation,
  the trace may not necessarily be continuous. At the end of the day, the total length of the trace is proportional to the duration of sunshine.  
  Rain Gauge  
The Rainfall Gauge is used to measure the amount of rainfall over a specified area.
The rainfall gauge has a collecting funnel at its entrance, which is designed to minimize the loss of rain by splashing. The rain falls through an aperture at the base of the funnel into a collecting jar, which is seated inside an inner can to collect any overflow. The rainfall is then measured, usually once per day, by pouring the collected rainfall into a separate measuring jar.
  The base of the gauge is splayed outwards at the bottom to provide additional stability.  
 
 

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