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Measuring temperature and humidity
The main principles
Changes in air temperature occur for several reasons :
the incidence of solar beams on the thermic masses other than air (the phenomena increases as they approach the ground)
the moving of the atmosphere
the shocks between water molecules which generate extremely high energy exchanges
Humidity is everywhere, it is mainly due to solar beams warming up the earth’s surface and causing water evaporation in the atmosphere.
The humidity measured is relative, it corresponds to the amount of water present in a particule of air compared to the maximum amount of water this same particule of air can contain.
In climatology, the classical way to measure temperature and airhumidity is done using a shelter. The use of a meteorological shelter must enable the hygrothermic balance between the air inside and outside. This hygrothermic balance creates the best conditions, so as to have an accurate measurement, whilst protecting the sensors from precipitation and any disturbing influence from solar beams.
Our advantages
For measuring temperature, DEGREANE HORIZON proposes a global offer, which may include probes (for example PT 100 ¼ DIN probe) – approved by, amongst others, METEO FRANCE.
For measuring humidity DEGREANE HORIZON includes well-known probe manufacturers in its offer, which are usually approved at by international meteorological services. Some of these probes can do the two measurements. The shelters sold by DEGREANE HORIZON are approved of and used by METEO FRANCE and many other National Meteorological Services.
Some advice
The temperature / humdity shelters must be cleared of any thermic masses which could influence the taking of temperature measurement. The sensors used for measuring temperature in the ground should be set up on land which has not be dug up or worked on, the ideal setting would be on land which has not been touched for several years.
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