Sensirion Ag

Samuel Wehrli

Felix Mayer

Mark Hornung

Lukas Bürgi

Andreas Rüegg

Eric Monnin

David Kiliani

Daniel Traeutlein

Daniel Traeutelein

Davy Graf

A regulation device for regulating a mixing ratio (x) of a gas mixture comprises a first conduit () for carrying a flow of a first gas (e.g., air) and a second conduit () for carrying a flow of a second gas (e.g., a fuel gas). The first and second conduits () open out into a common conduit () in a mixing region (M) to form the gas mixture. A first sensor (S) is configured to determine at least one thermal parameter of the gas mixture downstream from the mixing region. A control device () is configured to receive, from the first sensor, sensor signals indicative of the at least one thermal parameter of the gas mixture and to derive control signals for adjusting device (V) acting to adjust the mixing ratio, based on the at least one thermal parameter.

Device for regulating a mixing ratio of a gas mixture

A portable electronic device comprises a chemical sensor that is sensitive to a concentration of a chemical analyte and at least two auxiliary sensors that are sensitive to parameters that are different from the concentration of the chemical analyte. The portable electronic device comprises a control device that receives signals from the chemical sensor and from the auxiliary sensors at a plurality of points in time distributed over a measurement period and correlates the time dependencies of these signals to obtain a corrected reading of the first chemical sensor. The portable electronic device may be employed for breath analysis.

Concentration measurements with a mobile device

The flow of a fluid of unknown composition is measured by leading the fluid over a first temperature sensor, a heater and a second temperature sensor. The temperature difference DTP between the temperature sensors is measured, as well as the temperature T of at least one of them. In addition, calibration data is used to store the temperature Tref of a known reference fluid. The offset T&#x2212;Tref at a given temperature difference DTP is a direct measure of the composition of the fluid and allows to retrieve any parameter depending on the same.

Method for measuring a fluid composition parameter by means of a flow sensor

Growing community of inventors

Wädenswil, Switzerland

Samuel Wehrli