National Measurement Regulations 1999

2.1

inch

(a) automotive tyres or rims; or

(b) equipment used, or intended for use, in the manufacture or repair of automotive tyres or rims; or

(c) precision pipes, precision tubes, precision fittings or precision screw threads; or

(d) spare parts for equipment constructed using measurements other than metric measurements; or

(e) equipment used, or intended for use, in the manufacture of equipment referred to in paragraph (c) or (d); or

(f) defence equipment; or

(g) equipment used, or intended for use, in aviation; or

(h) equipment used, or intended for use, in the computer industry; or

(i) equipment used, or intended for use, in the electronics industry; or

(j) components of equipment referred to in subparagraphs (a) to (i) inclusive

2.2

foot

(a) altitude in aviation; or

(b) vertical separation in aviation; or

(c) submarine depth

2.3

troy ounce

the mass of precious metals

2.4

horsepower

engine ratings:

(a) in the aviation industry; or

(b) in defence equipment

2.5

millibar

air pressure in the aviation industry

2.6

millimetre of mercury

blood pressure

2.7

foot per minute

vehicular vertical speed

2.8

kilocalorie

food energy values

2.9

Degrees Brix

measurements of sugar concentration

2.10

Degrees Z

measurements of sugar concentration

2.11

Pol

measurements of sugar concentration

2.12

measurement of the mass concentration of alcohol in exhaled breath