(19)

(11)

EP 1 922 523 A1

(12)

(43) Date of publication: 21.05.2008 Bulletin 2008/21 (21) Application number: 06779631.8 (22) Date of filing: 05.09.2006

(51) International Patent Classification (IPC):  G01B 11/25(2006.01) G01N 21/954(2006.01) (86) International application number: PCT/GB2006/050277 (87) International publication number: WO 2007/029038 (15.03.2007 Gazette 2007/11)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 05.09.2005 GB 0517992 (71) Applicant: SLD Limited West Tullos, Aberdeenshire AB12 3AW (GB)	(72) Inventor: AL-OBAIDI, Ala Aberdeen Aberdeenshire AB15 6YJ (GB) (74) Representative: Jones, Keith William  Murgitroyd & Company 165-169 Scotland Street Glasgow, G5 8PL Glasgow, G5 8PL (GB)