Pumpvorrichtung und Verfahren zur Bestimmung der Konzentration einer Substanz in einer Flüssigkeit

Details

Veröffentlichungs-Nr.

EP3702777

Aktenzeichen

EP19159680

Anmeldetag

27. Februar 2019

Veröffentlichung

12. Januar 2022

Erteilung

12. Januar 2022

Rechtsraum

EP

IPC

G01N33/28G01N27/02F04D13/06F04D15/00F04D15/02// F04D13/08

Abstract

A pump device having at least one chamber (22) or conduit containing or provided for containing a liquid, a concentration sensor (24) arranged in said chamber (22) or conduit for detecting a concentration of a substance in said liquid and an evaluation unit (28) connected to said sensor (24), wherein said sensor (24) and said evaluation unit (28) are designed for an electrical impedance measurement, wherein said evaluation unit (28) is designed such that a measurement for detecting said concentration is carried out by use of an electrical signal applied to said sensor (24) having at least one frequency corresponding to or above an upper cut-off frequency (f2) of a frequency range showing a constant electrical impedance (Rm), as well as to a method for determining the concentration of a substance inside a liquid.

Anmelder

Firma

Grundfos Holding A/S

Land

🇩🇰 Dänemark

Fachgebiete