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ISO 23431:2021

Measurement of road tunnel air quality

Standard Details

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.

General Information

Status : Published
Standard Type: Main
Document No: ISO 23431:2021
Document Year: 2021
Pages: 31
Edition: 1

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ISO 23431:2021
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