A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> Concentrations

A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> Concentrations

A gas diluter based on critical orifices was built and evaluated. The gas diluter is capable of creating dilution ratios of 1:1400 at a total flow of 6.5 L/min. An extended uncertainty analysis of gas concentrations and dilution ratios according to the Guide to the Expression of Uncertainty in Measu...

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Bibliographic Details
Main Authors: Philipp Breitegger, Alexander Bergmann
Format: Article
Language:English
Published: MDPI AG 2018-12-01
Series:Proceedings
Subjects:
gas diluter
nitrogen dioxide
metrology
Online Access:https://www.mdpi.com/2504-3900/2/13/998
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spelling doaj-3fbe77b3116d4ee4b87ce5c5d05cc85e2020-11-25T02:28:19ZengMDPI AGProceedings2504-39002018-12-0121399810.3390/proceedings2130998proceedings2130998A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> ConcentrationsPhilipp Breitegger0Alexander Bergmann1Institute of Electronic Sensor Systems, Graz University of Technology, 8010 Graz, AustriaInstitute of Electronic Sensor Systems, Graz University of Technology, 8010 Graz, AustriaA gas diluter based on critical orifices was built and evaluated. The gas diluter is capable of creating dilution ratios of 1:1400 at a total flow of 6.5 L/min. An extended uncertainty analysis of gas concentrations and dilution ratios according to the Guide to the Expression of Uncertainty in Measurement was conducted. A gas cylinder of 5.16 ppm <i>NO</i><sub>2</sub> with a relative uncertainty of 1.5% (k = 1) can be diluted down to a concentration of 3.69 ppb <i>NO</i><sub>2</sub> (dilution ratio of 1:1400) at an uncertainty of 1.9% (k = 1). The results are in good agreement with reference <i>NO</i><sub>2</sub> measurements, conducted with a chemiluminescence detector (CLD, European reference method EN14211; 2005).https://www.mdpi.com/2504-3900/2/13/998gas diluternitrogen dioxidemetrology
collection DOAJ
language English
format Article
sources DOAJ
author Philipp Breitegger
Alexander Bergmann
spellingShingle Philipp Breitegger
Alexander Bergmann
A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> Concentrations
Proceedings
gas diluter
nitrogen dioxide
metrology
author_facet Philipp Breitegger
Alexander Bergmann
author_sort Philipp Breitegger
title A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> Concentrations
title_short A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> Concentrations
title_full A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> Concentrations
title_fullStr A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> Concentrations
title_full_unstemmed A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create <em>NO</em><sub>2</sub> Concentrations
title_sort precise gas dilutor based on binary weighted critical flows to create <em>no</em><sub>2</sub> concentrations
publisher MDPI AG
series Proceedings
issn 2504-3900
publishDate 2018-12-01
description A gas diluter based on critical orifices was built and evaluated. The gas diluter is capable of creating dilution ratios of 1:1400 at a total flow of 6.5 L/min. An extended uncertainty analysis of gas concentrations and dilution ratios according to the Guide to the Expression of Uncertainty in Measurement was conducted. A gas cylinder of 5.16 ppm <i>NO</i><sub>2</sub> with a relative uncertainty of 1.5% (k = 1) can be diluted down to a concentration of 3.69 ppb <i>NO</i><sub>2</sub> (dilution ratio of 1:1400) at an uncertainty of 1.9% (k = 1). The results are in good agreement with reference <i>NO</i><sub>2</sub> measurements, conducted with a chemiluminescence detector (CLD, European reference method EN14211; 2005).
topic gas diluter
nitrogen dioxide
metrology
url https://www.mdpi.com/2504-3900/2/13/998
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