(19)

(11)

EP 1 068 499 A1

(12)

(43) Date of publication: 17.01.2001 Bulletin 2001/03 (21) Application number: 00902715.2 (22) Date of filing: 03.02.2000

(51) International Patent Classification (IPC)7: G01L 1/16 (86) International application number: PCT/GB0000/298 (87) International publication number: WO 0046/580 (10.08.2000 Gazette 2000/32)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 03.02.1999 GB 9902341 03.02.2000 GB 0002433 (71) Applicant: Transense Technologies PLC Bicester,Oxon OX6 3HD (GB)	(72) Inventor: PERRY, James Anthony Harold Upper HeyfordBicester Oxon OX6 3HD (GB) (74) Representative: Rock, Olaf Colin  Rock and Company,Trelawn,Cassington Witney,Oxford OX8 1DN Witney,Oxford OX8 1DN (GB)