Certificate pursuant to section 12 of the Weights and Measures Act 1985 : Certification no. 2437 ... the Secretary of State for Trade and Industry hereby certifies as suitable for use for trade a pattern of a liquid flowmeter ... PRIMA series submitted by Schlumberger Electronic Transactions RPS Div.
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
Schlumberger Electronic Transactions RPS Div.
Teddington : National Weights and Measures Labortory,
1996.
Reference no. STD 8315.