Abstract: A method for determining a concentration of an analyte in a sample stream containing the analyte and a solvent includes: preparing a measured stream by diluting the sample stream with a solvent stream; ascertaining a concentration of the analyte in the measured stream; and ascertaining the concentration of the analyte in the sample stream as a function of the measured stream concentration and a dilution ratio of sample stream and measured stream. An apparatus of the invention includes: a first Coriolis mass flow measuring device for measuring a solvent stream as a function of the sample stream for diluting the sample stream; a second Coriolis device for ascertaining a mass flow of the measured stream; a density measuring device for ascertaining a density of the measured stream; and a computing and operating unit for computing the concentration of the analyte in the sample stream.

Abstract: A device includes: a chip, which includes a oscillatable cantilever with a first piezoelectric transducer for exciting cantilever oscillation, wherein the first cantilever extends into a cavity of the chip; a cantilever temperature sensor in an end section of the cantilever; a second temperature sensor spaced from the cantilever; a heating element located in the free end section of the cantilever and separated from the second temperature sensor by at least one cavity section; and an evaluation unit for determining density and viscosity as well as thermal conductivity and specific heat capacity of a gas mixture based respectively on oscillation characteristics of the cantilever and measured values of gas temperature from the cantilever temperature sensor, the second temperature sensor and a power consumption of the heating element.

Abstract: 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.

Abstract: A method for verifying a density and/or viscosity measuring device in a measuring station of a process installation during ongoing operation, in which a medium flows through a main channel of the process installation, comprising steps: providing a side channel, which is connected as a bypass of the main channel, wherein the side channel is fluidically connected to the main channel via two regions of the main channel with mutually differing diameters; providing a MEMS-based master or control density measuring device in the side channel such that the MEMS-based master or control density measuring device is flowed through by the medium; performing at least one verification measurement with the MEMS-based master or control density measuring device; and verifying the density and/or viscosity measuring device based on the at least one verification measurement performed by the MEMS-based master or control density measuring device.

Abstract: The invention relates to a method for producing a customer-specific sensor (10) on the basis of a standard sensor (20) using a sensor development package (30), the sensor development package (30) comprising at least the standard sensor (20) and a customization unit (40), and the method for producing the customer-specific sensor (10) having at least the following steps: customizing the customization unit to an application desired by a customer (S100); introducing the sensor development package (30) into the desired application of the customer (S200) so that the customer can test the sensor development package (30) in the application; testing the sensor development package introduced into the desired application, by the customer (S300); producing the customer-specific sensor (S400).