Next Article in Journal
Integrated Display and Simulation for Automatic Dependent Surveillance–Broadcast and Traffic Collision Avoidance System Data Fusion
Previous Article in Journal
Wireless Energy Harvesting Two-Way Relay Networks with Hardware Impairments
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(11), 2612; https://doi.org/10.3390/s17112612

Gas Measurement Using Static Fourier Transform Infrared Spectrometers

Institute for Measurement Systems and Sensor Technology, Technical University of Munich, 80333 Munich, Germany
*
Author to whom correspondence should be addressed.
Received: 16 October 2017 / Revised: 10 November 2017 / Accepted: 11 November 2017 / Published: 13 November 2017
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [3263 KB, uploaded 15 November 2017]   |  

Abstract

Online monitoring of gases in industrial processes is an ambitious task due to adverse conditions such as mechanical vibrations and temperature fluctuations. Whereas conventional Fourier transform infrared (FTIR) spectrometers use rather complex optical and mechanical designs to ensure stable operation, static FTIR spectrometers do not require moving parts and thus offer inherent stability at comparatively low costs. Therefore, we present a novel, compact gas measurement system using a static single-mirror Fourier transform spectrometer (sSMFTS). The system works in the mid-infrared range from 650 cm - 1 to 1250 cm - 1 and can be operated with a customized White cell, yielding optical path lengths of up to 120 cm for highly sensitive quantification of gas concentrations. To validate the system, we measure different concentrations of 1,1,1,2-Tetrafluoroethane (R134a) and perform a PLS regression analysis of the acquired infrared spectra. Thereby, the measured absorption spectra show good agreement with reference data. Since the system additionally permits measurement rates of up to 200 Hz and high signal-to-noise ratios, an application in process analysis appears promising. View Full-Text
Keywords: optical gas measurement; static Fourier transform spectroscopy; infrared spectroscopy; gas concentration; high-speed gas measurement; gas process monitoring; static single-mirror Fourier transform spectrometer optical gas measurement; static Fourier transform spectroscopy; infrared spectroscopy; gas concentration; high-speed gas measurement; gas process monitoring; static single-mirror Fourier transform spectrometer
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Köhler, M.H.; Schardt, M.; Rauscher, M.S.; Koch, A.W. Gas Measurement Using Static Fourier Transform Infrared Spectrometers. Sensors 2017, 17, 2612.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top