Abstract: Devices are provided for the controlled exposure of a sensor or sensor component. The device may include a substrate; at least one reservoir provided in the substrate; at least one sensor or sensor component located in the at least one reservoir; at least one reservoir cap closing an opening in the at least one reservoir to isolate the sensor or sensor component from a selected environmental component outside of the at least one reservoir; at least one intermediate barrier layer disposed in the at least one reservoir between the reservoir cap and the sensor or sensor component; and means for disintegrating the reservoir cap to expose the sensor or sensor component to the selected environmental component.

Abstract: A system for more accurately measuring glucose in a sample includes a first glucose-sensing electrode incorporating a quantity of glucose oxidase, a second glucose-sensing electrode incorporating a quantity of PQQ-glucose dehydrogenase, a reference electrode, and means for selecting between a first glucose measurement made with the first glucose-sensing electrode and a second glucose measurement made with the second glucose-sensing electrode.

Abstract: A disposable urea sensor has a laminated body having a fluid sample inlet end and an electrical contact end, a fluid sample inlet, a substantially flat sample chamber in communication between the fluid sample inlet and a vent opening, the sample chamber being adapted to collect a fluid sample through the fluid sample inlet, a working electrode and a reference electrode within the sample chamber, and a reagent matrix disposed on the working electrode wherein the reagent matrix contains urease.

Abstract: An oxygen sensor has a laminated body with a fluid sample inlet end and an electrical contact end, a fluid sample inlet, a substantially flat test chamber communicating with the fluid sample inlet where the test chamber is adapted to collect a fluid sample through the sample fluid inlet, a working electrode and a reference electrode within the test chamber, and a reagent matrix disposed on the working electrode where the reagent matrix contains an oxidase, a reduced form of a redox mediator and a peroxidase.

Abstract: A system and method for correcting the oxygen effect on oxidase-based analyte sensors includes an oxygen sensor with a working electrode, a reagent matrix disposed on at least the working electrode that contains a reduced form of a redox mediator, an oxidase and a peroxidase, an oxidase-based analyte sensor, a means for determining the oxygen concentration in a portion of a fluid sample using the oxygen sensor, means for determining an analyte concentration in another portion of the fluid sample using the oxidase-based analyte sensor, and means for using the oxygen concentration in the fluid sample to determine a corrected analyte concentration in the fluid sample.