Stevenson Screen Double Roof

This is my project to build a stevenson screen.

Stevenson screen double roof.

It was designed by thomas stevenson 1818 1887 a scottish civil engineer who designed many lighthouses and was the father of author robert louis stevenson the development of his small thermometer screen with double louvered walls on all sides and no floor was reported 156 years ago in 1864 after comparisons with other screens in the united kingdom stevenson s original design was modified. It is used to house weather instruments for example the six s thermometer hygrometer. The walls of the screen are double louvered and the floor is that of staggered boards. 24 0 in by 23 3 in and a double screen 765 mm high by 1050 mm wide x 593 mm deep 30 1 in by 41 3 in by 23 3 in.

A stevenson screen or instrument shelter is a shelter or an enclosure to shield meteorological instrument against precipitation and direct heat radiation from outside sources while still allowing air to circulate freely around them. So i needed to get a more standardised reading and the answer is a stevenson screen. Figure 2 4 louvered detail and roof of stevenson screen prototype constructed by brian burley 6 figure 2 5 the average difference between the temperature in the small. Stevenson screen as per is 5948 1970 the screen is a rectangular wooden box provided with a door in front.

All the four sides are double louvered the roof is double and the floor consists of overlapping boards separated by an air space. Small screen for metrological thermometers large screen for thermograph and. The roof is double layered with provision for ventilation between the two layers. The walls of the screen are double louvred and the floor is made of staggered boards.

Double roof walls and floor of white painted wood provide screening and extensive louvres maintain adequate ventilation on all but the stillest days. The roof of the screen is doublelayered with provisions for ventilation of the space between the two layers. The large stevenson screen is constructed in accordance with the wmo recommendations. It was invented by the british engineer and meteorologist sir thomas stevenson 1818 1887 the father of robert louis stevenson.

I use temperature readings a lot in my projects please take a look at www flowrc co uk and i noticed that the readings were really influenced by direct sunlight etc. A stevenson screen is a prominent feature on most weather stations. Why was the stevenson screen made of wood raised 121 cm off the ground have a double roof and have louvres.