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(11)

EP 3 963 295 A1

(12)

(43) Date of publication: 09.03.2022 Bulletin 2022/10 (21) Application number: 20731518.5 (22) Date of filing: 30.04.2020

(51) International Patent Classification (IPC):  G01F 15/06(2022.01) G01F 15/14(2006.01) G01F 15/18(2006.01) G01D 4/00(2006.01) (52) Cooperative Patent Classification (CPC): G01F 15/063; G01F 15/185; G01F 15/14; G01D 4/008; Y04S 20/30 (86) International application number: PCT/FI2020/050288 (87) International publication number: WO 2020/225478 (12.11.2020 Gazette 2020/46)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 03.05.2019 FI 20195358 (71) Applicant: Aqva.Io Oy 28100 Pori (FI)	(72) Inventors: MÄKIVAARA, Jarkko 28100 Pori (FI) STRANDMAN, Ville 28100 Pori (FI) (74) Representative: Papula Oy  P.O. Box 981 00101 Helsinki 00101 Helsinki (FI)