I have completed my indoor weather station:http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1265087241
The next step is to include sensors from a remote outdoor location.
All my sensors use an unsigned integer format. I have written the code
to send the sensor data from a remote location:http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1268083394
A common way to house the sensors is in a Stevenson Screen:http://en.wikipedia.org/wiki/Stevenson_screen
The traditional Stevenson Screen is a box shape, constructed of wood, in a double-louvered design.
This is very costly and needs to be maintained-also costly.
There are many examples of home built screens:http://www.loganvillageweather.com/station/stevenson.html
I have used a polystyrene produce box as my shield.
The sensors are mounted in a wooden box covered by the poly box.
A Stevenson screen or instrument shelter is an enclosure to shield meteorological instruments against precipitation and direct heat radiation from outside sources, while still allowing air to circulate freely around them.
The poly box shields the sensors but to circulate air I have used a 12v fan. I have battery backed 12v available and this is not a problem.
The cost problem is solved by the poly box being disposable and very cheap
The bottom of the box is 1.3m above the ground.
The support is a galvanized pipe concreted into the ground.
Concrete is a good conductor and this pipe makes a good earth point.
More design information is available from: