Sensor devices
First Claim
1. An electrochemical sensor device for measuring a level of an analyte of interest in a fluid comprising:
- a flowpath for a fluid;
a substrate on one side of the flowpath;
on the substrate, a calibration electrode comprising;
i) a first layer comprising a first measurement electrode;
ii) a second layer located on the first layer, the second layer comprising an internal standard comprising a first predetermined amount of first dry calibration analyte; and
iii) a third layer located on the second layer, the third layer comprising a dry reagent film layer comprising a reagent for the analyte of interest,wherein at least part of the third layer comprising the dry reagent film layer overlays at least part of the second layer comprising the first predetermined amount of the first dry calibration analyte located on the first layer comprising the first measurement electrode to form the calibration electrode; and
wherein a distance between at least part of the dry reagent film layer and at least part of the first predetermined amount of the first dry calibration analyte is within about 15 μ
m.
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Accused Products
Abstract
The present invention relates to a sensor device for measuring a level of an analyte of interest in a fluid, such as body fluid (for example blood, plasma, urine, interstitial fluid, saliva), a method of manufacturing a sensor device, a reagent film for use in a sensor, a method of manufacturing a reagent film for use in a sensor, a method of conducting an assay using a sensor, a method of calibrating a measurement from a sensor, a method of calibrating a batch of sensors, a meter for use with a sensor and a kit comprising a meter and a sensor according to the invention. A first aspect of the invention provides a sensor device for measuring a level of an analyte of interest In a fluid comprising: a flowpath for the fluid; on the flowpath, a reagent for the analyte of interest adjacent to an internal standard comprising a first predetermined amount of a first calibration analyte; and further wherein the reagent and the predetermined amount of a first calibration analyte are in dry form. A second aspect of the invention provides a device comprising: a first calibration electrode having the first predetermined amount of first calibration analyte and reagent for the analyte of interest located thereon; a first working electrode having reagent for the analyte of interest thereon, and further wherein the first calibration electrode lies upstream of the first working electrode.
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Citations
31 Claims
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1. An electrochemical sensor device for measuring a level of an analyte of interest in a fluid comprising:
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a flowpath for a fluid; a substrate on one side of the flowpath; on the substrate, a calibration electrode comprising; i) a first layer comprising a first measurement electrode; ii) a second layer located on the first layer, the second layer comprising an internal standard comprising a first predetermined amount of first dry calibration analyte; and iii) a third layer located on the second layer, the third layer comprising a dry reagent film layer comprising a reagent for the analyte of interest, wherein at least part of the third layer comprising the dry reagent film layer overlays at least part of the second layer comprising the first predetermined amount of the first dry calibration analyte located on the first layer comprising the first measurement electrode to form the calibration electrode; and wherein a distance between at least part of the dry reagent film layer and at least part of the first predetermined amount of the first dry calibration analyte is within about 15 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An electrochemical sensor device for measuring a level of an analyte of interest in a fluid comprising:
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a sample chamber comprising a flowpath for the fluid and a substrate; on the flowpath, a calibration electrode, comprising; i. a first measurement electrode on the substrate, ii. a dry reagent film layer comprising a reagent for the analyte of interest, and iii. an internal standard comprising a first predetermined amount of a first dry calibration analyte located on the first measurement electrode, wherein at least part of the dry reagent film layer is located on at least part of the first predetermined amount of first dry calibration analyte located on the first measurement electrode, to form the calibration electrode and, wherein a distance between at least part of the dry reagent film layer and at least a part of the first predetermined amount of first dry calibration analyte is within about 15 μ
m. - View Dependent Claims (28, 29, 30, 31)
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Specification