(19)

(11)

EP 1 368 634 A2

(12)

(88) Date of publication A3: 03.01.2003 (43) Date of publication: 10.12.2003 Bulletin 2003/50 (21) Application number: 02702560.0 (22) Date of filing: 08.03.2002

(51) International Patent Classification (IPC)7: G01N 15/14, G01N 15/02, H05H 3/04, H01J 49/16 (86) International application number: PCT/GB0201/071 (87) International publication number: WO 0207/3167 (19.09.2002 Gazette 2002/38)

(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: 14.03.2001 GB 0106346 (71) Applicant: Facility Monitoring Systems Limited Malvern,Worcestershire WR14 2AZ (GB)	(72) Inventor: HILL, Barrington James Ledbury,Herefordshire HR8 1LX (GB) (74) Representative: Jackson, Derek Charles  Derek Jackson Associates,The Old Yard,Lower Town Claines,Worcester WR3 7RY Claines,Worcester WR3 7RY (GB)