G - Physics – 01 – N
Patent
G - Physics
01
N
73/100
G01N 25/66 (2006.01) G01N 25/68 (2006.01)
Patent
CA 1126980
ABSTRACT OF THE DISCLOSURE There is disclosed apparatus for measuring the dew point which is arranged to carry out a method in which there is repeatedly performed a measuring cycle in which a body on which dew can form is cooled gradually until the form- ation of dew thereon is detected by detecting means, the temperature at which dew forms on said body being recorded in the apparatus and the temperature of said body being subsequently allowed to rise prior to cooling again in the next succeeding cycle. The temperature of said body is monitored continuously and the rate of cooling of the body in each cycle is controlled in dependence upon the differ- ence between the instantaneous temperature of said body and the dew point temperature measured in a preceding cycle and recorded in the apparatus in such a way that the rate of cooling is lower for at least a range of temperatures closer to said dew point temperature recorded in said previous cycle than for instantaneous temperatures of said body further from said dew point temperature recorded in said previous cycle. Thus, it is possible to combine the advantages of a rapid cooling rate, affording a high sampling frequency, and of a slow cooling rato, affording good accuracy.
339936
Kirby Eades Gale Baker
Protimeter Limited
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