Patent ID: 8603309

Claim:
A sensor strip configured for hemoglobin measurements in a whole blood sample, comprising: a base layer having at least a first electrically conductive layer and a second electrically conductive layer disposed on a surface thereof; a first amount of a reagent composition that includes at least an effective amount of a hemoglobin sensitive redox mediator and an effective amount of polymer binder in contact with said first electrically conductive layer to define a working electrode and a second amount of a reagent composition that includes an effective amount of polymer binder in contact with said second electrically conductive layer to define a reference electrode; and a channel providing communication between said first amount and said second amount of reagent composition; wherein said sensor strip returns a measurable electrical signal indicative of the hemoglobin content of a blood sample in response to an independent application of a variable voltage and a constant voltage across said working electrode and said reference electrode when said blood sample is in contact with said first and second amounts of reagent composition inside said channel.