Sensirion Ag

Frank Roeck

Felix Mayer

Moritz Lechner

Michael Dommer

A breath analyzer is described with at least one chemical sensor sensitive to the concentration of a component in a sample of exhaled breath including a compensator for compensating for the effect of variations in the amount of exhaled breath between the user and the sensor location with the chemical sensor being integrated into a portable electronic device, particularly with the sensor being located in an air duct with an opening to the exterior of the housing of the analyzer with the total area of the opening being sufficiently small to restrict effectively mass transport between the exterior and the sensor and/or wherein the compensation includes the compensation for different responses of sensors.

Portable electronic device with breath analyzer

A measuring device is provided for determining the type and/or concentration a gaseous analyte from a set of analytes in a gaseous carrier. It comprises a housing having a passage to a cavity. A gas sensor with a heated metal-oxide sensing layer is arranged in the cavity. In order to gain a better understanding of the type of the analyte, diffusion effects are exploited by taking into account that the diffusion process through the passage as well as the catalytic reaction rate at the metal-oxide sensing layer depend on the type of the analyte. These material parameters can be determined by taking several measurements in a non-steady state of the concentration of the analyte within the cavity or while varying the reaction rate.

Method for determining analyte type and/or concentration with a diffusion based metal oxide gas sensor

A portable electronic device is described with telecommunication capabilities to allow for data and/or voice communication via private or public networks, having an integrated chemical sensor sensitive to ketones within a breath sample of a user wherein the sensor comprises at least one metal oxide gas sensor and a control circuit for the sensor integrated onto a common substrate or package.

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Wil, Switzerland

Frank Roeck