A sensor arrangement

Details A sensor arrangement A sensor arrangement

G - Physics

01

N

G01N 27/416 (2006.01) G01N 27/49 (2006.01) G01N 33/18 (2006.01)

Patent

CA 2540626

The present invention relates to a sensor arrangement adapted to evaluate an instant quality related value of a measured liquid sample ("S") by applying a discontinuous and/or a continuous signal ("V") to a number of electrodes (2, 3, 4), which are in electrical contact with said liquid sample ("S"), where a current (I1, I2, I3), or equivalent quantity, measured at different potentials (voltage levels) between a reference electrode (3) and at least one working electrode (2 or 4), is evaluated at least at such time sequences where said measured current reflects the presence of any redox-active component, that may either be oxidation, reduction or neutral, at said working electrode (2 or 4). Said reference electrode (3) and said working electrode or electrodes (2, 4) are coordinated to simultaneously be immerged by a flow or stream of liquid samples ("S1", "S", "S2"), that said reference electrode (3) and said working electrode or electrodes (2, 4) are connected to an electronic arrangement (5), and that said electronic arrangement includes a first circuit (5a), for evaluating said instant quality related value, and a second circuit (5b), for evaluating any chemical and/or biological changing in said measured instant quality related value, in relation to a stored (5c) reference value.

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