Abstract: In a method for manufacturing a chemical sensor with multiple sensor cells, a substrate is provided and an expansion inhibitor is applied to the substrate for preventing a sensitive material to be applied to an area on the substrate for building a sensitive film of a sensor cell to expand from said area. The sensitive material is provided and the sensitive film is built by contactless dispensing the sensitive material to said area.

Abstract: A sensor chip comprises a substrate (1) with a front side (11) and a back side (12), and an opening (13) in the substrate (1) reaching through from its back side (12) to its front side (11). A stack (2) of dielectric and conducting layers is arranged on the front side (11) of the substrate (1), a portion of which stack (2) spans the opening (13) of the substrate (1). Contact pads (32) are arranged at the front side (11) of the substrate (1) for electrically contacting the sensor chip. A sensing element (4) is arranged on the portion of the stack (2) spanning the opening (13) on a side of the portion facing the opening (13).

Abstract: A sensor chip comprises a substrate (1) with a front side (11) and a back side (12), and an opening (13) in the substrate (1) reaching through from its back side (12) to its front side (11). A stack (2) of dielectric and conducting layers is arranged on the front side (11) of the substrate (1), a portion of which stack (2) spans the opening (13) of the substrate (1). Contact pads (32) are arranged at the front side (11) of the substrate (1) for electrically contacting the sensor chip. A sensing element (4) is arranged on the portion of the stack (2) spanning the opening (13) on a side of the portion facing the opening (13).

Abstract: A handheld work apparatus includes a fuel tank, into which a flexible fuel line projects. A suction head is arranged at the free end of the fuel line. The suction head is connected via the fuel line to a fuel supply device of an internal combustion engine of the work apparatus. The suction head has at least one weight member. The weight member is formed at least partially as a magnet to achieve good cleaning of the fuel without a substantial increase in the weight of the work apparatus.

Abstract: There is disclosed a flow sensor arrangement, comprising a main channel (1) for conveying a fluid, a bypass (2) connected to the main channel (1) for conveying a portion of the fluid supplied in the main channel (1), and a flow sensor (6) for measuring a flow of the fluid portion in the bypass (2). The bypass (2) branches off from the main channel (1) at an angle (?) of less than 90 degrees between an inlet section (21) of the bypass (2) and a supply section (11) of the main channel (1). By such design means, particles can be prevented from entering the bypass (2) by this adversely affecting the measurements.

Abstract: An electromagnetic fuel valve has a valve chamber, a valve element and a valve seat assigned to the valve element. The valve chamber is delimited by an electromagnetic drive which moves the valve element relative to the valve seat. The drive includes a receiving housing for a coil carrier with an electrical coil. A magnet core is inserted into the coil carrier and has an end section facing the valve element. At an open sealing end facing toward the valve chamber, a sealing element is arranged between the end section of the magnet core and the receiving housing. To achieve good sealing, that end section of the magnet core situated in the sealing element expands the sealing element and compresses the material thereof radially against the edge of the sealing end of the receiving housing to seal the valve chamber to the interior space of the receiving housing.

Abstract: A pressure sensor comprises a first substrate containing a processing circuit integrated thereon and a cap attached to the first substrate. The cap includes a container, a holder, and one or more suspension elements for suspending the container from the holder. The container includes a cavity and a deformable membrane separating the cavity and a port open to an outside of the pressure sensor. The container is suspended from the holder such that the deformable membrane faces the first substrate and such that a gap is provided between the deformable membrane and the first substrate which gap contributes to the port. Sensing means are provided for converting a response of the deformable membrane to pressure at the port into a signal capable of being processed by the processing circuit.

Abstract: A device with a micro- or nanoscale structure representing one or more of a mechanical structure, a sensing element, an active and/or passive electrical circuitry, comprises a component (1) containing the micro- or nanoscale structure (13), and a support (2) for the component (1). The support (2) contains a recess (23). The component (1) is arranged at least partly in the recess (23). An electrically conducting structure (3) is provided for bridging a gap (6) between the component (1) and the support (2).

Abstract: A method of manufacturing an integrated metal oxide gas sensor is described including the steps of depositing a composition with metal oxide particles or precursors thereof at the desired location on a substrate including electronic components followed by a step of heating the substrate whereby the heating step is designed such that it creates a local temperature difference between the location of the deposited composition and the location of more temperature sensitive parts of the sensor such as the electronic components and is interrupted before the temperature of the substrate at the location of the electronic components reaches a threshold above which the more sensitive parts can be damaged.

Abstract: A chemical sensor (10) is described with at least one layer of a metal oxide (11) arranged between two current injecting electrodes (16,16) with the length (L) of the layer of a metal oxide between the current injecting electrodes being less than 50 microns and one or a pair of voltage sensing electrodes (17) connected to the layer of a metal oxide (11) with the electrodes (16,16?,17) forming a 3- or 4-terminal arrangement for determining the resistance changes of layer material (11) excluding series resistances such as contact resistances close to or at at least one of the current injecting electrodes (16) from the resistance measurement.

Abstract: The pump is provided with a plurality of pumping chambers and electrically activatable valves. An elastic membrane is arranged in each pumping chamber and divides the same into a first and a second chamber section. Each valve is connected to the second chamber section of a pumping chamber. When a pressure drop is applied over the valve and the valve is activated (i.e. opened), the pressure in the second chamber section changes, which causes the membrane to move, which in turn leads to a change of the volumes of both chamber sections. This e.g. allows to pump well-defined amounts of fluid from the chamber sections to a drug dispensing device.

Abstract: 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.

Abstract: In a method for manufacturing a chemical sensor with multiple sensor cells, a substrate is provided and an expansion inhibitor is applied to the substrate for preventing a sensitive material to be applied to an area on the substrate for building a sensitive film of a sensor cell to expand from said area. The sensitive material is provided and the sensitive film is built by contactless dispensing the sensitive material to said area.

Abstract: A gas sensor comprises a set of one or more sensor cells (SC) and a substrate (1). Each sensor cell (SC) of the set comprises a sensitive film (42) built from a sensitive material (4) covering an area of the substrate (1). One or more elevated structures (2) are manufactured in or around said area for preventing the sensitive material (4) to expand when being applied thereto.

Abstract: In a method for calibrating a portable first electronic device (1) comprising a first chemical sensor, a determination is carried out whether the first electronic device is located near a second electronic device comprising a second chemical sensor. If this is the case and if optionally other criteria are fulfilled, readings of the first and second chemical sensor are compared. Subject to the comparison, calibration values for the first chemical sensor are derived.

Abstract: A differential pressure sensor comprises a membrane arranged over a cavity on a semiconductor substrate. A lid layer is arranged at the top side of the device and comprises an access opening for providing access to the top side of the membrane. A channel extends laterally from the cavity and intersects with a bore. The bore is formed by laser drilling from the bottom side of the substrate and provides access to the bottom side of the membrane. The bore extends all through the substrate and optionally into the lid layer.

Abstract: 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 analyser 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.

Abstract: The pump is provided with a plurality of pumping chambers and electrically activatable valves. An elastic membrane is arranged in each pumping chamber and divides the same into a first and a second chamber section. Each valve is connected to the second chamber section of a pumping chamber. When a pressure drop is applied over the valve and the valve is activated (i.e. opened), the pressure in the second chamber section changes, which causes the membrane to move, which in turn leads to a change of the volumes of both chamber sections. This e.g. allows to pump well-defined amounts of fluid from the chamber sections to a drug dispensing device.

Abstract: A portable electronic device and a related methods are described using an integrated chemical sensor linked to a chemical sensor processing unit and being sensitive to the concentration of a component in a sample of air and one or more contextual sensors not including chemical, temperature and humidity sensors, wherein output from the contextual sensors is linked to a local or remote interpretation processor generating a constraint or correlation set transferred to the chemical sensor processing unit for use in determining a result of a chemical measurement as performed by the chemical sensor.

Abstract: The invention relates to a chemical sensor (1) comprising a substrate layer (2) having a front surface (2.1) and a back surface (2.2) and a sensing layer (3) arranged on the front surface (2.1) of the substrate layer (2), the sensing layer (3) comprising a sensing element (4) and the substrate layer (2) being provided with a well (5) in the back surface (2.2) to a form a membrane (6) that incorporates the sensing element (4), wherein the substrate layer (2) is provided with contact pads (10) on the back surface (2.2) and with vias (11) extending from the front surface (2.1) to the back surface (2.2) for electrically connecting the sensing element (4) with the contact pads (10), wherein a handling layer (17) is provided on top of the sensing layer (3), the handling layer (17) surrounding the sensing element (4), and wherein the thickness (d1) of the handling layer (17) is larger than the thickness (d2) of the substrate layer (2).