(19)

(11)

EP 0 805 955 A1

(12)

(43) Date of publication: 12.11.1997 Bulletin 1997/46 (21) Application number: 96900695.0 (22) Date of filing: 25.01.1996

(51) International Patent Classification (IPC):  G01B 11/ 02( . ) G01D 5/ 34( . ) (86) International application number: PCT/IE1996/000002 (87) International publication number: WO 1996/023199 (01.08.1996 Gazette 1996/35)

(84) Designated Contracting States: DE ES FR GB IE IT NL (30) Priority: 25.01.1995 IE 19950000049 (71) Applicant: Industrial Innovation And Development Limited Brittas, County Dublin (GB)	(72) Inventor: MARKHAM, Charles County Dublin (IE) (74) Representative: Casey, Lindsay Joseph, et al  F. R. Kelly & Co. 27 Clyde Road Ballsbridge Dublin 4 Dublin 4 (IE)