PUMP DEVICE AND METHOD FOR DETERMINING THE CONCENTRATION OF A SUBSTANCE INSIDE A LIQUID

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), wherei...

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Bibliographische Detailangaben
Hauptverfasser:	Eriksen, Gert Friis, Jørgen Jensen
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING HEATING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MEASURING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS PHYSICS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS TESTING WEAPONS
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Beschreibung
Zusammenfassung:	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.