(19)

(11)

EP 1 552 315 A1

(12)

(43) Date of publication: 13.07.2005 Bulletin 2005/28 (21) Application number: 03751097.1 (22) Date of filing: 09.10.2003

(51) International Patent Classification (IPC)7: G01R 21/133, G01F 15/06, G01F 15/075, G01F 15/00 (86) International application number: PCT/IB2003/004448 (87) International publication number: WO 2004/034069 (22.04.2004 Gazette 2004/17)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 10.10.2002 ZA 200208148 (71) Applicant: Actaris Measurement and Systems (Proprietary) Limited Cape Town,Western Cape Province 8001 (ZA)	(72) Inventor: Taylor, Donald Michael Stellenbosch,Western Cape Province 7600 (ZA) (74) Representative: Hervouet, Sylvie et al Feray Lenne Conseil,39/41, avenue Aristide Briand 92163 Anthony Cedex 92163 Anthony Cedex (FR)