Instruments which are used to measure temperature and Humidity should be kept inside "stevenson screen". Its a wooden box to shade from direct sunlight, Its painted white to reflect sunlight, It has vents to allow free flow of air. The stevenson screen should be located away from trees and buildings which could affect the temperature!
Stevenson screen or instrument shelter is a screen to shield meteorological instruments against precipitation and direct heat radiation from outside sources, while still allowing air to circulate freely around them.[1] It forms part of a standard weather station. The Stevenson screen holds instruments that may include thermometers (ordinary, maximum/minimum), a hygrometer, a psychrometer, a dewcell, a barometer and a thermograph. Stevenson screens may also be known as a cotton region shelter, an instrument shelter, a thermometer shelter, a thermoscreen or a thermometer screen. Its purpose is to provide a standardised environment in which to measure temperature, humidity, dewpoint and atmospheric pressure.um), a hygrometer, a psychrometer, a dewcell, a barometer and a thermograph. Stevenson screens may also be known as a cotton region shelter, an instrument shelter, a thermometer shelter, a thermoscreen or a thermometer screen. Its purpose is to provide a standardised environment in which to measure temperature, humidity, dewpoint and atmospheric pressure.
lots of things including temp sunlight humidity and atmospheric pressure
Maximum and minimum thermometer & wet and dry thermometer
the stevenson screen works effectively because it provides a shelter for the instruments and also a standardise environment to measure temperature,humidityand dewpoint.
NMM
because it is
Stevenson Screen
thermometers, wet-dry bulbs and barometers
The Thermometer, hygrometer, psychrometer, dewcell, barometer and thermograph are all generally used in the Stevenson screen.
The ground, like tarmac or concrete is a solid state which absorb sunlight due to the dark colour (e.g. black). Therefore there is probability that the Stevenson Screen can absorb these heat which can then alter the readings of the instruments. Hope that helps JL
In the 1860s. I think. By Thomas Stevenson.
In the 1860s. I think. By Thomas Stevenson.
he invented the instrument
The sides of a Stevenson Screen are louvered to allow air to circulate through the Stevenson's Screen easily.
to prevent heat radiation and damage by people or animals
In observataries,the thermometers are kept in a wooden box with good ventilation and air movement.This box is called stevenson's screen
because it is
thermometer
to support
Stevenson Screen
[object Object]
To allow the air to circulate