Apparatus for accurately measuring the water content of gases
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United States of America Patent
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Sep 6, 1994
Grant Date -
N/A
app pub date -
Oct 27, 1992
filing date -
Nov 6, 1991
priority date (Note) -
Expired
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Abstract
An apparatus for accurately measuring the water content of a moist gas containing less than 50 parts per million (ppm) of water comprises an isothermal heat-sink (14), a radiator (20), a Peltier heater-cooler (24) thermally arranged between the isothermal heat-sink (14) and the radiator (20). The heater-cooler (24) is transferring heat from the isothermal heat-sink (14) to the radiator (20) and vice versa. A phosphoric acid moisture cell (32) is in thermal contact with the isothermal heat-sink (14). Upon passing the moist gas through the cell (32) the amount of moisture in the moist gas is measured as variation of electrical current throughout the cell.
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