ISO 23431:2021

Measurement of road tunnel air quality

Publication date: Mar 19, 2021

General information

Current stage: 60.60 Effective date: Mar 19, 2021

Originator: ISO

Owner: ISO/TC 146/SC 3

Type: International Standard

ICS: 13.040.20 93.060

Languages: English French

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Status: Published

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Scope

This document describes methods for determining air speed and flow direction, CO, NO and NO2 concentrations and visibility in road tunnels using direct-reading instruments. This document specifically excludes requirements relating to instrument conformance testing.

Life cycle

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PUBLISHED
ISO 23431:2021
60.60 Standard published
Mar 19, 2021

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