Patent ID: 8298389

Claim:
A system for determining the concentration of an analyte in a sample, the system comprising: a sensor comprising: (a) a first substrate and a second substrate; (b) a sample chamber present between the first substrate and the second substrate, the sample chamber having an inlet, a volume of no more than about 1 μL, and having therein: (c) a working electrode on the first substrate; (d) a counter electrode on the second substrate opposed to the working electrode, together the working electrode and the counter electrode having a distance therebetween and forming an electrode overlap, with the distance therebetween being no more than 10% of an axial length of the overlap; (e) a pair of indicator electrodes, wherein one of the indicator electrodes in the pair is located on the first substrate and the other indicator electrode in the pair is located on the second substrate, wherein the pair of indicator electrodes is located downstream of the working and counter electrodes; and (f) a measurement zone having a volume about 75% or less than the volume of the sample chamber, the measurement zone defined by the electrode overlap, wherein the sensor is configured to determine the concentration of the analyte in the sample that only partially fills the sample chamber, wherein the sample chamber consists of the working electrode, the counter electrode, and the pair of indicator electrodes, wherein the indicator electrodes are configured to confirm that the sample has stopped flowing in the sample chamber before the determining of the concentration of the analyte; and a meter programmed to monitor a change in an existing signal from the indicator electrodes to confirm that the sample has stopped flowing in the sample chamber before the determining of the concentration of the analyte.