(19)

(11)

EP 1 151 254 A1

(12)

(43) Date of publication: 07.11.2001 Bulletin 2001/45 (21) Application number: 99963094.0 (22) Date of filing: 15.12.1999

(51) International Patent Classification (IPC)7: G01F 15/06 (86) International application number: PCT/US9929/830 (87) International publication number: WO 0036/380 (22.06.2000 Gazette 2000/25)

(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: 15.12.1998 US 212176 (71) Applicant: DANIEL INDUSTRIES, INC., Houston, TX 77055 (US)	(72) Inventors: LAMBERT, J., David, A., Katy, TX 77494 (US) MALIK, Vipin Houston, TX 77095 (US) HEUER, Rick Katy, TX 77450 (US) (74) Representative: Holmes, Matthew Peter et al MARKS & CLERK,Sussex House,83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)