BSI 20/30382325 DC 2020
$13.70
BS ISO 23431. Measurement of road tunnel air quality
Published By | Publication Date | Number of Pages |
BSI | 2020 | 36 |
This Standard describes methods for determining air speed and flow direction, carbon monoxide (CO), nitric oxide (NO) and nitrogen dioxide (NO2) concentrations and visibility in road tunnels using direct-reading instruments. This Standard specifically excludes requirements relating to instrument conformance testing.