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Definitions of Measurements

Legal Notice 201 of 1988

This is the latest version of this Legal Notice.
Definitions of Measurements
Citation
Legal Notice 201 of 1988
Primary work
Weights and Measures Act
Date
31 December 2022
Language
English
Type
Legal Notice
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LAWS OF KENYA

WEIGHTS AND MEASURES ACT

DEFINITIONS OF MEASUREMENTS

LEGAL NOTICE 201 OF 1988

  • Published in Kenya Gazette Vol. XC—No. 25 on 13 May 1988
  • Commenced on 13 May 1988
  1. [Amended by The Weights and Measures Act—Definitions of Measurements (Legal Notice 224 of 1991) on 24 May 1991]
  2. [Revised by 24th Annual Supplement (Legal Notice 221 of 2023) on 31 December 2022]
In accordance with sections 6, 7, 8, 9 and 10 of the Weights and Measures Act (Cap. 513), the Cabinet Secretary for Commerce orders that for all purposes in Kenya, the definitions in the second column of the Schedule of the corresponding units of measurements in the first column of the Schedule are meanings appearing to the Cabinet Secretary to reproduce in English the International definitions of the units of measurements at the date of this Order.

SCHEDULE

Units of Measurements Definitions
The Kilogram Is equal to the mass of the International prototype of the Kilogram.
The Metre The length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.
The Second The duration of 9192 631 770 periods of the radiation corresponding of the transition between the two hyperfine levels of the ground state of caesium 133 atom.
The ampere That constant current which if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one metre apart in vacuum, would produce these conductors a force equal to 2 x 10-7 Newton per metre of length.
The Kelvin Unit of thermodynamic temperature Is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water.
The Candela The luminous intensity in a given direction of source that emits monochromatic radiation of frequency 540 x 1012 hertz which has a radiant intensity in that direction of 1/683 watts per steradian.
The Mole 1. The amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12.2. When the mole is used the elementary entities must be specified, and may be atoms, molecules, ions, electrons, other particles or specified groups of such particles.
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History of this document

31 December 2022 this version
24 May 1991
13 May 1988
Published in Kenya Gazette 25
Commenced