# The Measuring Instruments Regulations 2016, Paragraph 6: Other requirements


The resolution shall be equal to or of one order of magnitude higher than the values shown in Table 3.
Table 3
Resolution
CO
CO2
O2
HC
Class O and class I
0.01 % vol
0.1 % vol
0.01 % vol for measurand values below or equal to 4 % vol, otherwise 0.1 % vol.
1 ppm vol
The lambda value shall be displayed with a resolution of 0.001.
The standard deviation of 20 measurements shall not be greater than one third of the modulus of the MPE for each applicable gas volume fraction.

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Source: https://www.legislation.gov.uk/uksi/2016/1153/schedule/1J/paragraph/6 (the official version)
Page: https://openlegislation.uk/measuring-instruments-regulations-2016/schedule-1J/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.