Endress + Hauser Flowtec Ag

Truedyne Sensors Ag

Patrick Reith

Christof Huber

Anastasios Badarlis

Hagen Feth

Josua Ritter

Fabio Schraner

The present disclosure relates to a method for determining a volumetric and/or mass flow rate of a medium flowing in a tube, wherein a density and/or a viscosity of the fluid is/are determined using a MEMS sensor chip, wherein the medium flowing in the tube at least partially flows through a measuring channel of the MEMS sensor chip to determine the density and/or the viscosity of the fluid, and wherein the volumetric and/or mass flow rate of the medium is determined regardless of the medium based on a detected pressure drop over the measuring channel of the MEMS sensor chip and the density and/or viscosity determined by the MEMS sensor.

Method for determining a volumetric and/or mass flow rate

A method for determining properties of a hydrocarbon-containing gas mixture includes determining a thermal conductivity value, density measurement, viscosity measurement, and temperature and pressure. The method also includes determining a hydrogen content of the gas mixture on the basis of the thermal conductivity value and the temperature and pressure, determining a density measurement and associated temperature and pressure, and determining the mean molar mass or standard density on the basis of the density measurement and the temperature and pressure. The method further includes determining the mean molar mass or standard density of a hydrogen-free residual gas mixture based on the mean molar mass or standard density and the hydrogen fraction, determining the Wobbe index of the residual gas mixture based on the viscosity measurement and the temperature and pressure, and determining a calorific value based on the mean molar mass or standard density and the Wobbe index.

Method for determining properties of a hydrocarbon-containing gas mixture and device for the same

The invention relates to a method for producing a customer-specific sensor on the basis of a standard sensor using a sensor development package, the sensor development package comprising at least the standard sensor and a customization unit, and the method for producing the customer-specific sensor having at least the following steps: customizing the customization unit to an application designated by a customer; introducing the sensor development package into the designated application of the customer so that the customer can test the sensor development package in the application; testing the sensor development package introduced into the designated application, by the customer; and producing the customer-specific sensor.

Method for producing a customer-specific sensor

The present disclosure relates to a method for determining the methane index of a hydrocarbon-containing combustion gas mixture which has natural gas or biogas, having the steps: flowing the gas mixture through a measuring assembly; determining a first value of a first measurement variable related to a viscosity of the gas mixture; determining a second value of a second measurement variable related to a density of the gas mixture; determining a pressure value of the gas mixture, said pressure value belonging to the first value and the second value; determining a temperature value of the gas mixture, said temperature value belonging to the first value and the second value; and determining the methane index as a function of the first value, the second value, the pressure value, and the temperature value.

Method for determining the methane index of a hydrocarbon-containing combustion gas mixture

The present disclosure relates to a gas analyzer for measuring density and/or viscosity of a medium. The gas analyzer includes a connection panel having first and second media openings, each of which extends from a first surface to a second surface of the connection panel. A sensor panel is joined together with the connection panel on a first joint plane, and a cover panel is joined together with the sensor panel on a second joint plane, on a sensor panel face facing away from the connection panel. The cover panel has a cover panel cavity which communicates with the first and second media openings, and the sensor panel has at least one oscillator cavity which communicates with the first and second media openings. The sensor panel has a micromechanical oscillator arranged in the oscillator cavity and excitable to mechanically vibrate perpendicularly to the joint planes.

Gas analyzer and gas analyzing device

A MEMS sensor for measuring at least one measured variable, especially a density, a flow and/or a viscosity, a flowing fluid, is described, comprising: at least one microfluidic channel having a channel section excitable to execute oscillations; and an exciter system for exciting a desired oscillation mode, causing the channel section to execute oscillations in a predetermined plane of oscillation. The MEMS sensor has improved oscillation characteristics at least in part because the channel section is composed of an anisotropic material, having directionally dependent elasticity and which is spatially oriented such that a modulus of elasticity determinative for a stiffness of the channel section relative to deflections of the channel section perpendicular to the plane of oscillation is greater than a modulus of elasticity determinative for a stiffness of the channel section relative to deflections of the channel section in the plane of oscillation.

Growing community of inventors

Basel, Switzerland

Patrick Reith