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BSI BS ISO 23431:2021

Measurement of road tunnel air quality
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BSI BS ISO 23431:2021

Measurement of road tunnel air quality

PUBLISH DATE 2021
PAGES 40
BSI BS ISO 23431:2021

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.

SDO BSI: British Standards Institution
Document Number ISO 23431
Publication Date March 23, 2021
Language en - English
Page Count 40
Revision Level
Supercedes
Committee EH/2/3
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