Method and apparatus for measurement of dewpoint of gases
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United States of America Patent
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Jan 14, 1992
Issued Date -
N/A
app pub date -
May 9, 1991
filing date -
Aug 3, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and an apparatus for measuring dewpoint of different kinds of gases is based upon cooling the measured gas by mixing it with a cold gas down to the dewpoint and then detecting the generated mist by optical sensors. The cooling gas is routed to a measurement area (7) from outside the process and the cooling gas is brought to an appropriate temperature below the dewpoint of the measured gas before being conducted to the measurement area (7) where it is mixed with the measured gas. Mist generated during the cooling of the measured gas is detected by illuminating the measurement area (7) by a light emitting source (8) and measuring the light (2) scattered from the mist or light (3) penetrating through the mist with the help of a photodetector (9).
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