(19)

(11)

EP 1 231 833 A1

(12)

(43) Date of publication: 21.08.2002 Bulletin 2002/34 (21) Application number: 00981923.6 (22) Date of filing: 17.11.2000

(51) International Patent Classification (IPC)7: A01J 5/013, G01N 33/04 (86) International application number: PCT/NZ0000/232 (87) International publication number: WO 0103/5728 (25.05.2001 Gazette 2001/21)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 18.11.1999 NZ 50123899 08.06.2000 NZ 50501900 (71) Applicant: Sensortec Limited Hamilton (NZ)	(72) Inventors: WHYTE, David, Simon Hamilton (NZ) CLAYCOMB, Rodney, Wayne Hamilton (NZ) (74) Representative: Wakerley, Helen Rachael  Reddie & Grose,16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)