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The Stevenson Screen 

See some images of typical Stevenson Screens

STEVENSON - Thomas

Born: 1818, Edinburgh Died: 1887

Engineer and Meteorologist

Son of Robert Stevenson. Father of R L Steveson, the author  Most famous invention was the azimuthal condensing system of lighthouse illumination. Also invented the Stevenson Screen (1864) used in meteorology still today. It consists of a wooden cupboard, with hinged door, mounted on a steel or timber stand, so that its base is about 3 ft 6 in. above the ground, the whole painted white. Indirect ventilation is provided through the bottom, double roof and double louvered sides, and thermometers placed within it give a close approximation to the true air temperature, undisturbed by the effects of direct solar or terrestrial radiation 

Some plans for differnt units...

http://www.ohio4h.org/~weather/SteveScreen.html

Stevenson Screen Plans   491K zip file
     

 
  A well proven design that has stood the test of time. This weather station is used all over the world by amateur and professional meteorologists, farmers, research laboratories, schools and universities to name but a few. 
 

 Shown here in the open position

SIZES: Height: Width: Depth:
EXTERNAL: 26"
660mm 		23"
580mm 		15¾"
400mm
INTERNAL: 15"
380mm 		16"
405mm 		9"
225mm

All sizes are approximate.
  The marine screen is specifically designed for use at sea or wherever the weather is particularly extreme.
 
SIZES: Height: Width: Depth:
EXTERNAL: 20¾"
525mm 		12¼"
310mm 		8¾"
230mm
INTERNAL: 15¼"
385mm 		7"
175mm 		4"
100mm
All sizes are approximate.
 

 

Designed for a standard minimum-maximum thermometer.

SIZES: Height: Width: Depth:
EXTERNAL: 14"
355mm 		8¾"
222mm 		5"
126mm
INTERNAL: 12½"
320mm 		6¾"
170mm 		3¾"
95mm

All sizes are approximate.
  This thermometer screen is the standard housing for the British Meteorological Office giving them a close approximation of true air temperature, undisturbed by direct solar or terrestrial radiation
 
SIZES: Height: Width: Depth:
EXTERNAL: 23½"
600mm 		26½"
675mm 		19¾"
500mm
INTERNAL: 18"
460mm 		17¼"
438mm 		12¼"
310mm

All sizes are approximate.
  A close up of a stevenson screen, slightly different design.
  A typical field installation.

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