A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create NO2 Concentrations

Philipp Breitegger; Alexander Bergmann

doi:10.3390/PROCEEDINGS2130998

A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create NO2 Concentrations

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Abstract

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 NO2 with a relative uncertainty of 1.5% (k = 1) can be diluted down to a concentration of 3.69 ppb NO2 (dilution ratio of 1:1400) at an uncertainty of 1.9% (k = 1). The results are in good agreement with reference NO2 measurements, conducted with a chemiluminescence detector (CLD, European reference method EN14211; 2005).

Original language	English
Title of host publication	A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create NO2 Concentrations
Pages	1-4
Volume	2
Edition	13
DOIs	https://doi.org/10.3390/PROCEEDINGS2130998
Publication status	Published - 7 Dec 2018

Publication series

Name	Proceedings
Publisher	MDPI AG
ISSN (Print)	2504-3900

Keywords

gas diluter
metrology
nitrogen dioxide

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10.3390/PROCEEDINGS2130998

https://www.mdpi.com/377496

A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create NO2 Concentrations
Philipp Breitegger (Speaker) & Alexander Bergmann (Contributor)
10 Sept 2018
Activity: Talk or presentation › Poster presentation › Science to science

Cite this

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title = "A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create NO2 Concentrations",

abstract = "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 NO2 with a relative uncertainty of 1.5% (k = 1) can be diluted down to a concentration of 3.69 ppb NO2 (dilution ratio of 1:1400) at an uncertainty of 1.9% (k = 1). The results are in good agreement with reference NO2 measurements, conducted with a chemiluminescence detector (CLD, European reference method EN14211; 2005).",

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N2 - 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 NO2 with a relative uncertainty of 1.5% (k = 1) can be diluted down to a concentration of 3.69 ppb NO2 (dilution ratio of 1:1400) at an uncertainty of 1.9% (k = 1). The results are in good agreement with reference NO2 measurements, conducted with a chemiluminescence detector (CLD, European reference method EN14211; 2005).

AB - 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 NO2 with a relative uncertainty of 1.5% (k = 1) can be diluted down to a concentration of 3.69 ppb NO2 (dilution ratio of 1:1400) at an uncertainty of 1.9% (k = 1). The results are in good agreement with reference NO2 measurements, conducted with a chemiluminescence detector (CLD, European reference method EN14211; 2005).

KW - gas diluter

KW - metrology

KW - nitrogen dioxide

U2 - 10.3390/PROCEEDINGS2130998

DO - 10.3390/PROCEEDINGS2130998

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BT - A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create NO2 Concentrations

ER -

A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create NO2 Concentrations

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A Precise Gas Dilutor Based on Binary Weighted Critical Flows to Create NO2 Concentrations

Cite this