GAS CONCENTRATION MEASUREMENT APPARATUS
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United States of America Patent
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Issued Date -
Jan 4, 2018
app pub date -
Jun 7, 2017
filing date -
Jun 30, 2016
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Abstract
In order to provide a gas concentration measurement apparatus that suppresses any change in the temperature of an optical fiber, and also makes it difficult for any effects to appear in the measurement accuracy due to air from the surrounding environment penetrating the optical path of the measurement light while using only a simple structure and without causing any excessive energy consumption there are provided a first sealing component provided between an incident surface of a gas cell and a first end surface that is formed at a periphery of an emission aperture of a light-emitting unit so as to enclose the periphery of the emission aperture, and a second sealing component provided between an emission surface of the gas cell and a second end surface that is formed at a periphery of an incident aperture of a light-receiving unit so as to enclose the periphery of the incident aperture.
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