Patent ID: 8150115

Claim:
A chemistry strip reader for analyzing chemistry strips, comprising: a conveyor having a surface for supporting a plurality of chemistry strips in a plurality of imaging positions and for moving the chemistry strips through the imaging positions at discrete points in time; a camera for capturing images of a field of view that includes the plurality of imaging positions and any of the chemistry strips therein, wherein the images are captured at the discrete points in time; and a processor for determining reflectance values for each of the chemistry strips from the captured images at the discrete points in time; wherein for each of the chemistry strips, the processor is further configured to calculate a concentration determination associated therewith by: fitting the determined reflectance values for the chemistry strip to a curve defined by A exp[−B(t+t o )]+C, where A, B, C, and t o are fit parameters; determining a first slope of the curve for t=−t o ; and comparing the first slope with known first slopes for known analyte concentrations.