(19)

(11)

EP 0 198 879 A1

(12)

(43) Date of publication: 29.10.1986 Bulletin 1986/44 (21) Application number: 85905237.0 (22) Date of filing: 23.10.1985

(51) International Patent Classification (IPC):  G01F 1/ 66( . ) G01R 25/ 00( . ) (86) International application number: PCT/NL1985/000040 (87) International publication number: WO 1986/002722 (09.05.1986 Gazette 1986/10)

(84) Designated Contracting States: DE FR GB IT NL SE (30) Priority: 23.10.1984 NL 19840003221 (71) Applicant: N.V. Nederlandsche Apparatenfabriek NEDAP NL-7141 DE Groenlo (NL)	(72) Inventor: FOCKENS, Tallienco, Wieand, Harm NL-7152 GV Eibergen (NL)