Abstract: A device for the analysis of the qualitative, optionally also the quantitative composition of gases, uses measuring light of known spectral composition that can pass through the gas to be analyzed and the gas can be caused to interact. A detector arrangement is present, which can detect light originating from the sites of the interaction between the measuring light and the gas to be analyzed. At least one refractive-diffractive optical element is provided, which is transparent over its entire surface and contributes to a wavelength-dependent imaging of the light to be detected onto the detector arrangement in a transmitting manner. The refractive-diffractive optical element is arranged in the ray path between the area in which the interaction between the gas to be analyzed and the measuring light takes place and the detector arrangement.

Abstract: Process for attaching flexible electrochemical sensors, comprising at least the steps: provision of a surface, to which the sensor is to be attached; provision of an adhesive means at least on parts of the surface to which the sensor is to be attached and/or at least on parts of an outer limiting surface of the sensor, which ensures adhesion that securely fixes the sensor in case of flat contact between parts of the surface to which the sensor is to be attached and at least parts of the outer limiting surface of the sensor; pressing the sensor onto the surface to which the sensor is to be attached, so that the adhesive means is brought into flat contact at least with parts of the surface to which the sensor is to be attached and at least parts of the outer limiting surface of the sensor.

Abstract: A process device and system for measuring flow parameters in flowing gases is provided in which a device for flow-induced sound generation is in the area of the flow to be measured. A measurement of the frequency and/or the level of the sounds generated is made during the flow to be measured as acoustic parameters. A determination is made as to the flow parameters to be measured by processing the measured acoustic parameters. The process makes possible, in particular, the measurement of the volume flows during respiration near the patient.

Abstract: A breathing mask for breathing support devices (10) to guide the breathing support gas to the patient. The mask includes a mask body including a material that is permeable to air at least in partial areas. A gas guiding structure is provided which can be connected to suction openings of the breathing support device (10). The gas guiding structure extends through the interior of the mask body. The gas guiding structure for the transport/delivery of gas is limited partially by air-permeable areas of the wall of the mask body, through which ambient air can be drawn in. The mask is characterized by high wear comfort and improved safety against accidental coverage of the suction areas.

Abstract: A sealing frame for a breathing mask is provided that can be adapted to the contours of the face of a mask user in a simple manner. The sealing frame (1), includes a soft plastic material (5) with embedded metal strips (6).

Abstract: A breathing mask with a mask body (3), has a seal (1) at its edge. The seal is placed in contact with the user's face. At least part of the surface of the seal that is in contact with the user's face has an adhesive surface.

Abstract: A breathing mask with a mask body, which has a seal at its edge, which said seal is in contact with the user's face, wherein at least part of the seal that is in contact with the user's face is elastically deformable with spring characteristics ranging from linear to progressive and at least part of the seal that is in contact with the user's face is elastically deformable with degressive spring characteristic.

Abstract: A breathing mask to be fastened with a strap on the head with breathing gas supply through the strap. The strap includes areas that have a multilayer design and at least two layers of the material of the strap lying one on top of another are connected with one another such that they form a channel, through which a gas can flow.

Abstract: The invention relates to an apparatus and a method for improved correction of drift in an infrared measuring instrument. The measurement signal furnished by a thermal detector is split into a direct voltage component and an alternating voltage component. By means of calibration curves (24, 27), a calculated comparison variable T DC , korr 900 is formed from a measured, averaged concentration value c AC1 900 . The correction value ?T for the drift correction is obtained from the difference between the corresponding measured size of the direct voltage component T DC 900 and the comparison variable T DC , korr 900 .

Abstract: A digital electrochemical sensor is provided with a sensor electrode array (1-4) and an operating electronic unit integrated on a chip for processing electrical signals received therefrom. The operating electronic unit includes a potentiostat circuit and a microprocessor, which receives and further processes the signals processed by the operating electronic unit. To provide an electrochemical sensor which can be operated more simply and with higher precision during installation and in operation the potentiostat circuit is a digital circuit, whose controller function is controlled by the microprocessor (20), and for the microprocessor (20) to be also integrated on the chip of the operating electronic unit.

Abstract: A reflector is provided as well as a time-of-flight mass spectrometer with a reflector. The mass spectrometers is used for determining the chemical structure of molecules as well as for the quantitative analysis of unknown mixtures of substances. Design effort is minimized, especially for the reflector. The reflector is present in the time-of-flight mass spectrometer to generate an electrostatic field permitting the best possible focusing for the deflection of the ions. The reflector body is made in one piece as a radially symmetrical trough. The reflector is preferably made of a stainless steel or a carrier material with conductive coating and is polished on the inner side of the trough.

Abstract: An adapter (1) and electrochemical gas sensor (2) is provided with an electrochemical gas sensor housing (14) accommodating an electrolyte (13), with at least one measuring electrode (12) arranged therein and with a membrane (11), which screens the measuring electrode (12) from a measured gas and is permeable to the measured gas. The measuring sensitivity of an electrochemical gas sensor is increased by the adapter (1) having a gas-impermeable surface (15) extending in parallel to and at a spaced location from the membrane (11). The adapter (1) and the membrane (11) form a flow gap (10) for the measured gas delivered by a pump. The adapter (1) may be plugged onto the electrochemical sensor (2) at its outer edge (1a). The measured gas enters through a central opening (17), expands in the flow gap (10) radially to the outside and leaves same via the ring-shaped gap (16).

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: An electrochemical gas sensor, which has a substantially more compact design and is manufactured with a considerably reduced manufacturing effort. A conical, calotte-shaped, hemispherical or cylindrical outer housing is provided with gas admission openings (3, 203). A cover (8, 208) as well as a layer structure is provided with, from the outside to the inside, the diffusion membrane (4, 204) with the electrodes (5, 6, 7; 205, 206, 207) applied thereto in a planiform manner, a layer (11, 211) consisting of a mat material or a porous body, which accommodates the electrolyte, and an electrolyte space (10, 210), which is filled at least partially with the electrolyte.

Abstract: An electrochemical gas sensor is provided which can be assembled economically and in a few steps. The electrodes (1, 2, 3) with associated electric lines are applied in a planiform manner to a membrane strip, which is impermeable to the electrolyte but permeable to gases. The membrane strip (6) is deposited in the sensor housing in a zigzag-folded pattern, so that the membrane strip limits the opening of the sensor housing for the entry of the measured gas. The electrodes (1, 2, 3) are arranged stacked in the sensor housing (5, 7) at spaced locations from one another due to the membrane strip (6) deposited in a zigzag-folded pattern.

Abstract: An electrochemical cell for separating oxygen from the ambient air can be manufactured in a simple manner and inexpensively and both the electrodes and the electrolyte can be manufactured as thin layers. The electrochemical cell has a metallic housing plate (7), a gas-permeable carrier plate (11) located on the housing plate (7), a system of layers on the carrier plate (11), including a first electrode (13), an electrolyte (15) and a second electrode (17) exposed to the ambient air, wherein the oxygen generated is drawn off via a discharge opening at the housing plate (7).

Abstract: An electrochemical gas sensor (1) is disclosed with a plurality of electrodes (2, 3, 4). The sensor has substantially reduced cross sensitivity with respect to interfering gases. At least the measuring electrode (2) is provided as a thin layer of diamond-like carbon (DLC, diamond-like carbon) on the gas-permeable membrane (9).

Abstract: An electrochemical gas sensor for detecting a specific gas being measured with a plurality of electrodes (21, 3, 4), an electrolyte (7) and a gas-permeable membrane (9) has a reduced cross sensitivity with respect to interfering gases, a short response time and high sensitivity for the measured gas without the service life being reduced. The measuring electrode is a layer of doped diamond thin (21) on a porous substrate (22), where the gas-permeable memebrane is disposed over the measuring electrode to permit passage therethru of the gas being measured.

Abstract: An optical gas-measuring system and process identifies especially infrared-active individual gases over a measuring path of about 100 m and to determine their concentration averaged over the measuring path swept. The laser source (11) emits a divergent ray beam, from which both the measuring beam and the reference beam are formed after a single-time reflection of the emitted ray beam. A first radiation reflector (14) is designed in the form of a first hollow mirror for the reflection of a first part of the ray beam emitted from the laser source (11) as a measuring beam into the open optical measuring path. A second radiation reflector (16) is designed in the form of a second hollow mirror for the reflection of a second part of the ray beam emitted from the laser source (11) as a reference beam into a reference gas cuvette (17) containing the reference gas sample for the gas to be measured.

Abstract: A device for measuring the flow of a fluid located in a fluid channel heats the fluid channel without additional components. A metallic tube (2) with predetermined thermoelectric potential is provided as a fluid channel. An a.c. power source (7) is connected to a partial section (6) of the tube (2) in such a manner that the partial section (6) is heated as a resistor element to an increased working temperature compared with the temperature of the fluid. At least one thermocouple (12) is provided with junction points formed along the partial section (6) in such a manner that at least two wires (8, 9) with another thermoelectric potential are connected to the tube (2) in the area of the partial section (6). A measuring circuit (13, 14, 15) evaluates the thermocouple voltage of the thermocouple (12) and has a circuit (13) which eliminates the a.c. voltage component superimposed to the thermocouple voltage as a consequence of the a.c. heating.