# The Measuring Instruments Regulations 2016, Paragraph 2.3


For the ambient pressure:
— the minimum and the maximum values of the ambient pressure are for both classes: pmin ≤ 860 hPa, pmax ≥ 1,060 hPa.

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Source: https://www.legislation.gov.uk/uksi/2016/1153/schedule/1J/paragraph/2.3 (the official version)
Page: https://openlegislation.uk/measuring-instruments-regulations-2016/schedule-1J/paragraph-2.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.