Gas constituent measuring apparatus
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United States of America Patent
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Aug 13, 2024
Grant Date -
Dec 17, 2020
app pub date -
Aug 28, 2020
filing date -
Mar 30, 2018
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Abstract
A gas constituent measuring apparatus includes a cell that draws in a first gas to be measured, gas sensors that respond to one or more types of constituent gases in the cell, a regulator that controls humidity in the cell, a pump, a humidity sensor that detects the humidity in the cell, and an integrated circuit. The integrated circuit controls the regulator and pump on the basis of a detection result of the humidity sensor so that the humidity is within a predetermined range before the first gas is drawn into the cell or after the first gas is discharged from the cell, acquires first response values from the gas sensors with humidity being controlled, acquires second response values from the gas sensors with the first gas being in the cell, and determines concentrations of the one or more types of constituent gases from the first and second response values.
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