# Exhaust gas analysers — Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)

For Exhaust gas analysers, annex is Annex XII (MI-010); accuracy class is 0; condition is HC fraction; maximum permissible error is ± 10 ppm vol or ± 5 %, whichever is greater, recorded from its source on 2026-08-05.

- **Instrument type:** Exhaust gas analysers _(verified: appears in the quote below)_
- **Annex:** Annex XII (MI-010)
- **Accuracy class:** 0 _(verified: appears in the quote below)_
- **Condition:** HC fraction _(our reading, not quoted from the source)_
- **Maximum permissible error:** ± 10 ppm vol or ± 5 %, whichever is greater

## What the source says

> Two classes (0 and I) are being defined for exhaust gas analysers. The relevant minimum measuring ranges for these classes are shown in Table 1. Table 1 Classes and measuring ranges | Parameter | Classes 0 and I | CO fraction | from 0 to 5 % vol | CO 2 fraction | from 0 to 16 % vol | HC fraction |

## Source

- https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)](https://referencesource.org/legal-metrology-accuracy-classes/).