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A Nondispersive Optical Gas Sensor with Time Division Multiplexing of Reference and Active Signals

  • PHYSICAL INSTRUMENTS FOR ECOLOGY, MEDICINE, AND BIOLOGY
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Abstract

The design of a nondispersive optical infrared gas sensor with two infrared sources and a single sensor is presented. The operation of the device with the time separation of active and reference signals is demonstrated. An additional broadband photodetector is used to control the aging of radiation sources. The sensor is designed to determine the concentration of methane in an air–gas mixture with a methane volume fraction of 2.2% at most. The proposed sensor design makes it possible to determine the concentration with an accuracy of ±0.1% of the volume fraction of methane in the temperature range from –20°C to +50°C at a temperature change rate of no more than 2°C/min.

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ACKNOWLEDGMENTS

This study was performed within the framework of the Russian Science Foundation, project no. 22-12-00396. I am grateful to the staff of the Center for Innovative Technologies (Saratov) for consultations on the implementation of experiments.

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Authors and Affiliations

  1. Saratov State University, 410012, Saratov, Russia

    A. I. Konyukhov

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  1. A. I. Konyukhov
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Correspondence to A. I. Konyukhov.

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Translated by A. Seferov

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Konyukhov, A.I. A Nondispersive Optical Gas Sensor with Time Division Multiplexing of Reference and Active Signals. Instrum Exp Tech 66, 297–303 (2023). https://doi.org/10.1134/S0020441223010165

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  • DOI: https://doi.org/10.1134/S0020441223010165

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