Abstract: A field device adapter for wireless data transfer, comprises at least: an adapter housing; an adapter electronics unit arranged in the adapter housing, the adapter electronics unit comprising a first supply circuit, which is introduced into the first connection line, for providing a first supply voltage from a loop current flowing in the first connection line, and a second supply circuit, which is introduced into the second connection line, for providing a second supply voltage from the loop current flowing in the second connection line, wherein the adapter electronics unit further comprises a HART modem and a wireless module with an antenna for transmitting and/or receiving, and the adapter electronics unit is configured such that the first supply circuit supplies the HART modem with the first supply voltage, and the second supply circuit supplies the wireless module with the second supply voltage.

Abstract: A device and process monitor a spatial area for a target gas. A sensor of the gas detection device used has a detection variable (?Ukorr,0) that is affected by the concentration of target gas. A detection variable sensor measures this detection variable (?Ukorr,0). The influence of a slower influencing variable and of a faster influencing variable, on the detection variable (?Ukorr,0), are computationally compensated to determine an influence-corrected detection variable (?Ukorr,1). Depending on the influence-corrected detection variable (?Ukorr,1), the target gas concentration is determined. For computational compensation, the time course (Dr[?Ukorr,0]) of the respective influence of the two influencing variables is estimated, for which a measurement value series from the detection variable sensor is used.

Abstract: A thermal sensor device serves for determining a concentration of a target gas in a gas sample that further comprises a disturbance gas. The thermal sensor device comprises first and second measurement structures (1, 2) comprising first and second temperature sensors (TS1, TS2) and a heater element (31) operable to cause heat transfer to the measurement structures through the gas sample. Processing circuitry provides heating power (P3) to the heater element and derives an output signal (S) based on a response of the temperature sensors to the heating power, the output signal being indicative of a concentration of the target gas in the gas sample. The first and second measurement structures have different heat dissipation capabilities, and the processing circuitry derives the output signal from a weighted difference of temperature signals from the first and second temperature sensors.

Abstract: A field device adapter for wireless data transfer, comprises at least: an adapter housing; an adapter electronics unit arranged in the adapter housing, the adapter electronics unit comprising a first supply circuit, which is introduced into the first connection line, for providing a first supply voltage from a loop current flowing in the first connection line, and a second supply circuit, which is introduced into the second connection line, for providing a second supply voltage from the loop current flowing in the second connection line, wherein the adapter electronics unit further comprises a HART modem and a wireless module with an antenna for transmitting and/or receiving, and the adapter electronics unit is configured such that the first supply circuit supplies the HART modem with the first supply voltage, and the second supply circuit supplies the wireless module with the second supply voltage.

Abstract: The invention is directed to a gas sensor that includes a hotplate, a support structure, a gas selective filter, and circuitry. The support structure is configured to define a cavity. The gas selective filter is held by the support structure and spans the cavity. Various components are connected to the circuitry, and may include a temperature sensor element, a gas sensing element, and a heater. The temperature sensor element is configured to sense a temperature Tf of the filter. The gas sensing element is sensitive to a target gas in the cavity. The heater is in thermal communication with the gas sensing element. The circuitry is configured to operate the sensing element, estimate a temperature Tf of the filter, and regulate the heater. The circuitry regulates an extent to which power is supplied to the heater based on the estimated temperature Tf of the filter.

Abstract: Aspects of the invention relate to a semiconductor chip comprising a substrate and a stack arranged on the substrate. The stack comprises one or more insulating layers and one or more metal layers. The chip comprises a sensor device arranged in a sensor area (SA) of the semiconductor chip and processing circuitry arranged in a processing area (PA) of the semiconductor chip. The chip further comprises connection circuitry configured to provide an electrical connection between the sensor device and the processing circuitry. A first seal ring structure is arranged between an outer edge (ED) of the chip and an inner area (IA) of the chip. The inner area (IA) of the chip encompasses the sensor area (SA) and the processing area (PA). A second seal ring structure is arranged between the sensor area (SA) and the processing area (PA) and configured to constrain an infiltration of contaminants from the sensor area (SA) to the processing area (PA).

Abstract: The invention is notably directed to a gas sensor. The gas sensor basically comprises a hotplate, a support structure, a gas selective filter, and a circuitry. The support structure is configured so as define (or contribute to define) a cavity. It further supports the hotplate. The gas selective filter is held by the support structure. This filter spans the cavity. The filter may notably be designed to filter gas molecules according to their sizes. The circuitry includes one or more integrated circuits. Beside the integrated circuits, various components are connected to the circuitry. Such components include a temperature sensor element, a gas sensing element, and a heater. The temperature sensor element is arranged on or in a part of the support structure. The temperature sensor element is configured to sense a temperature Tf of the filter. The gas sensing element is arranged on or in the hotplate, so as to be sensitive to a target gas in the cavity.

Abstract: A method for fabrication of a sensor device (1) for measuring a parameter of a test substance, comprising: i) providing a substrate; ii) arranging on its front side a structured first protection layer (2); iii) arranging on the substrate with the structured first protection layer (2) a stack including first and second electrodes (3,4), a sacrificial layer between the first and second electrodes (3,4); and iv) etching in an etching step from the back side through the substrate such as to remove material of the semiconductor substrate and the sacrificial layer. The present invention also relates to such a sensor device (1).

Abstract: A method for fabrication of a sensor device (1) for measuring a parameter of a test substance, comprising: i) providing a substrate; ii) arranging on its front side a structured first protection layer (2); iii) arranging on the substrate with the structured first protection layer (2) a stack including first and second electrodes (3,4), a sacrificial layer between the first and second electrodes (3,4); and iv) etching in an etching step from the back side through the substrate such as to remove material of the semiconductor substrate and the sacrificial layer. The present invention also relates to such a sensor device (1).

Abstract: A test adapter for the saturated vapor calibration of gas-measuring devices. The test adapter (2) has, in an adapter housing (15), a peripheral edge (7) for receiving a gas-measuring device and has a depression (10) for receiving the sample liquid in the area of the gas-sensitive surface of the gas-measuring device.

Abstract: A test adapter for the saturated vapor calibration of gas-measuring devices. The test adapter (2) has, in an adapter housing (15), a peripheral edge (7) for receiving a gas-measuring device and has a depression (10) for receiving the sample liquid in the area of the gas-sensitive surface of the gas-measuring device.

Abstract: A gas-measuring device has an electrochemical sensor and features such that the readiness for use is guaranteed for a determined period of time. A status display (7), is activated by the evaluating circuit (3) of the gas-measuring device. The status display (7) displays the degree of depletion of the sensor.

Abstract: A gas-measuring device has an electrochemical sensor and features such that the readiness for use is guaranteed for a determined period of time. A status display (7), is activated by the evaluating circuit (3) of the gas-measuring device. The status display (7) displays the degree of depletion of the sensor.

Abstract: A process and device measures and checks concentration values of a plurality of gas components in a gas sample. The distortion of the measuring results by temperature and moisture effects, contamination as well as cross sensitivity and drift phenomena of the sensors of the gas-measuring device is a frequent problem in the measurement of gases by a gas-measuring device. It is possible with the process to recognize implausible measuring results as such on the gas-measuring device without design measures. This is achieved by the evaluation of data of suitably selected calibrating gases, from which a subvector space is constructed in the vector space of all possible measurement data (s1, s2, s3), represented as a plane (E), and a corresponding tolerance range is constructed. If the data (*) determined later during a measurement, are in the tolerance range, they are classified as plausible, and otherwise as implausible. The subvector space is constructed, e.g.

Abstract: A process and device measures and checks concentration values of a plurality of gas components in a gas sample. The distortion of the measuring results by temperature and moisture effects, contamination as well as cross sensitivity and drift phenomena of the sensors of the gas-measuring device is a frequent problem in the measurement of gases by means of a gas-measuring device. It is possible with the process to recognize implausible measuring results as such on the gas-measuring device without design measures. This is achieved by the evaluation of data of suitably selected calibrating gases, from which a subvector space is constructed in the vector space of all possible measurement data (s1, s2, s3), represented as a plane (E), and a corresponding tolerance range is constructed. If the data (*) determined later during a measurement, are in the tolerance range, they are classified as plausible, and otherwise as implausible. The subvector space is constructed, e.g.

Abstract: The invention relates to a method for operating an amperometric measuring cell which includes at least a measuring electrode 2 and a counter electrode 3 in an electrolyte chamber 4 filled with an electrolyte. The measuring cell is closed off by a permeable membrane 7 with respect to the measurement sample to be detected. The method of the invention improves the run-in performance of the measuring cell 1. The method includes the step of applying a voltage U.sub.1 across the electrodes (2, 3) during a first time span T.sub.1 starting at a reference time T.sub.0. A reference voltage U.sub.0 is assumed at the start of the measurement and the voltage U.sub.1 is increased relative to the reference voltage U.sub.0.

Abstract: The invention is directed to a method for detecting error sources in an amperometric measuring cell 1 which includes at least a measuring electrode 2 and a counter electrode 3 within an electrolyte chamber 4 filled with an electrolyte solution 6. A permeable membrane 7 closes off the electrolyte chamber 4 with respect to the measuring sample. The method includes the steps of: providing a voltage source 10 outputting a voltage U to apply across the electrodes to generate a sensor current i(t) between the electrodes; starting with the voltage U across the electrodes at a reference voltage U.sub.0 with a reference current i.sub.0, increasing or decreasing the voltage U to a first voltage U.sub.1 during a first time span T.sub.1 ; shortly after the voltage U assumes the first voltage U.sub.1, measuring a first sensor current i.sub.1 and/or, toward the end of the first time span T.sub.1, measuring a second sensor current i.sub.2 ; and, comparing the sensor currents i.sub.1 and/or i.sub.