Abstract: An electrode (100) for an electrochemical gas sensor (1), wherein the electrode has a gas-permeable membrane (4). A graphene layer (3) is applied as an electrode material to the gas-permeable membrane (4). Such an electrode (1) is prepared, for example, by applying a dispersion of graphene or graphene oxide in a volatile liquid to the gas-permeable membrane and evaporating the volatile liquid.

Abstract: A method and a device automatically manage mobile devices (1) with a storage device (10) with plural mobile device storage stations (12) and a mobile device maintenance station (14). A detection device (16, 18) detects the release and/or a return of a mobile device. A controller (30) is configured to determine a group of mobile devices (1) as a function of a ratio of at least one maintenance parameter of the particular mobile devices (1) to a corresponding maintenance threshold value, to select one of the mobile devices (1) from the group as a release device, to release the selected release device, and/or to receive the return device into the at least one maintenance station (14) or into one of the at least two storage stations (12) as a function of a ratio of at least one maintenance parameter of the return device to a corresponding maintenance threshold value.

Abstract: A rescue vehicle (2) includes a chassis (4), a drive unit (6) fastened to the chassis (4) and a driver's cab (8), which is fastened to the chassis (4). The chassis (4) is arranged behind the driver's cab (8) in a longitudinal direction L of the rescue vehicle (2). The rescue cab (10) has a gas-tight configuration. The rescue cab (10) has at least one door (12) as an access to the interior (14) of the rescue cab (10). The rescue vehicle (2) has an air supply unit (16), which is configured to supply the interior (14) of the rescue cab (10) with breathing air.

Abstract: A breathing apparatus includes a compressed air source with a compressed air source valve, a breathing regulator with a pressure reducer and a demand valve, a breathing mask connected to the demand valve at a first inlet connector, a second air source, a switching mechanism having an actuating member for switching between the compressed air source and the second air source and an exhalation valve, on the breathing mask, movable between a higher internal pressure in a second operating state than in a first operating state. The actuating member is provided on the breathing regulator. The switching mechanism, upon being switching to compressed air breathing, activates the lung-governed demand valve and adjusts the exhalation valve to the second operating state. Upon switching to breathing via the second air source, the lung-governed demand valve is deactivated and the exhalation valve (30) is adjusted to the first operating state.

Abstract: A method is provided for operating a gas concentration monitoring system as well as a gas-measuring device, a central unit, a gas concentration monitoring system as well as computer program product. The safety of persons or the safety of a situation is determined with respect to at least one hazardous gas. The concentration of the gas is provided to a memory and analysis device. A measured value rating number is determined for a preset period of use. A number of instances, of the measured concentration values exceeding of a preset gas concentration limit value is input. A safety code is determined from at least one of: the measured concentration values, the measured value rating numbers and from the a total number of instances in which a gas concentration limit value was exceeded.

Abstract: A device for respiration with a half mask (4) and with a strap (6) for pressing the half mask (4) onto the face of a mask user (7). Wearing comfort is facilitated by providing the strap (6) of a one-piece cut made of an elastic material and having at least one four-point connection with straps (9, 10) to the half mask (4).

Abstract: A component, especially an optical element, has a non-fogging surface. The surface has a honeycomb structure (1) with a plurality of honeycombs (2).

Abstract: A calibrating device (1) for a breath alcohol measuring device (25) as well as a system including such a calibrating device (1) and a breath alcohol measuring device (25) are shown and described. A test gas container (3), which provides a test gas, which can flow via an outlet (5) into an inlet (11) of a measuring adapter (9), is provided in the calibrating device (1). A measuring adapter (9) forms a flow path (17), in which the test gas is subjected to a dynamic pressure. The measuring adapter (9) is configured for being connected to a breath alcohol measuring device (25), which triggers a measurement when the dynamic pressure of the test gas reaches a pressure threshold value of the breath alcohol measuring device (25).

Abstract: A sensor unit (10) for detecting a gas is configured with a pressure-tight measuring channel (11), with a gas inlet (12) for introducing the gas into the measuring channel, with a gas outlet (13) for removing the gas from the measuring channel, and with a pump unit (14) for evacuating the measuring channel. The measuring channel has a gas sensor (15) for detecting the gas and a heating unit (16) for heating the gas sensor. The sensor unit (10) is configured to be operated in a measuring mode and in a regeneration mode. The measuring channel (11) is evacuated and the gas sensor (15) is heated in the regeneration mode.

Abstract: The invention relates to a respiratory circuit appliance with a respiratory line, a CO2 absorber (6) in the respiratory line, and a cooling device for cooling the respiratory gas after it exits the CO2 absorber. Provision is made that the cooling device cools a heating pump with a compressor (33) for compressing/condensing a cooling medium, a condenser (30), which receives the condensed cooling medium, and in so doing releases heat to the surroundings, and with a heat exchanger body (8) which receives the cooled cooling medium and is in heat-conducting contact with a section of the respiratory line.

Abstract: A blower filter system includes a blower unit (11), an electric motor (24) for driving a blower impeller, a control unit (27) for controlling the electric motor, contacts (22, 23) for connecting to a battery pack, and a battery pack (10) with secondary cells (12) with high energy density and contacts (22, 23) for connecting to the blower unit. The blower unit (11) can be detachably coupled to the battery pack (10). The battery pack is electrically connected to the blower unit via the contacts. The battery pack (10) has protective circuits including electronic components (15, 16, 17, 18, 19, 20, 21, 31) to electrically switch off at least one of the plurality of secondary cells (12) of the battery pack if excessive currents and/or excessive temperatures occur. The battery pack (10) and the blower unit (11) are each at least partially cast in a casting compound.

Abstract: A head protection device, e.g., a gas mask or a safety helmet, has a communication interface for sending a first communication signal and for receiving a second communication signal. Further, the gas mask has a signal processor providing an interface for sending the first communication signal, for detecting a microphone signal, for detecting the second communication signal and for sending an ear speaker signal. The signal processor is configured such that the first communication signal is sent as a function of the microphone signal, and that the ear speaker signal is further sent as a function of the second communication signal.

Abstract: An optical gas sensor (1), for quantitatively measuring a concentration of one or more gases, includes a radiation source (2) for emitting light waves (L), a cuvette (3) for holding a gas (G) to be measured, and a detector (4) for measuring light intensities. The light source (2) includes at least one emitter (5) of light waves (L) and is configured to emit light waves (L) of at least one first wavelength and of a second wavelength different from the first wavelength simultaneously or separately from each other. The emitter (5) is further configured to emit a spectrum the full half-life width of which is a maximum 50% of the effective wavelength, and to emit light waves (L) having a controlled beam path. The detector (4) is configured to quantitatively detect an intensity of emitted light waves (L) of the first wavelength and of the second wavelength.

Abstract: An electrochemical gas sensor (10) has a housing (20), a working electrode (51), a counterelectrode (52) and a reference electrode (53). The housing (20) has an electrolyte reservoir (30), a gas inlet orifice (21) and at least one gas outlet orifice (22). The electrolyte reservoir (30) is filled with a liquid electrolyte (40). The gas sensor (10) has a counterelectrode carrier (26). The counterelectrode (52) is suspended on the counterelectrode carrier (26) in such a way that the counterelectrode (52) is suspended in the electrolyte reservoir (30) and the electrolyte (40) flows around the counterelectrode (52) on all sides. Preferably, the electrolyte includes (I) a solvent, e.g. water, propylene carbonate, ethylene carbonate or mixtures thereof; (ii) a conductive salt, especially an ionic liquid; and/or (iii) an organic mediator, for example substituted quinones, anthraquinones, etc.

Abstract: A method for cooling a refuge chamber (100) with an emergency cooler (10) in an emergency situation includes cooling of a refrigerating agent (22) in a cold accumulator (20) with a cooling device (30) and detecting an emergency situation. Cold being stored in the refrigerating agent (22) of the cold accumulator (20) is released into the refuge chamber (100)—the refrigerating agent (22) of the cold accumulator (20) is exposed for heat transfer with the refuge chamber (100).

Abstract: A method for testing a gas sensor (30) and a gas-measuring device with a testing device for testing the gas sensor (30) make possible an improved analysis and evaluation of states of gas sensors (30). Due to the testing of a gas admission element (8) by monitoring measured signals (35, 38) in a time course (400) and a comparison with threshold values (350, 351) at predefined times (403, 404), (403?, 404?) in conjunction with the dispensing (91) of a quantity of test substance (5, 6), it is possible to test whether a gas supply (7) to the gas sensor (30, 309) is possible and given.

Abstract: A respiration system is provided with a container (1) in which, by an exothermic chemical reaction of a reaction material, CO2 is removed from the respiration air or oxygen is generated, and with an indicator of the consumption of the reaction material. The consumption indicator has a predetermined amount (7) of material which can be melted by the reaction heat of the exothermic chemical reaction. The material is kept in thermal contact with the container interior in such a manner that a measurement of the total reaction heat, and thus the consumption of reactive material, can be read from the degree of melting of the meltable material.

Abstract: A filter material is for the selective removal of siloxanes from a gas. The filter material contains a titanium compound, which is an organotitanate and/or a compound, which can be obtained by hydrolysis of an organotitanate. A method for the production of the filter material is also provided to use the filter material for the selective removal of siloxanes from a gas. A gas sensor is provided which includes the filter material.

Abstract: A system includes a blower filter system (20), having a blower filter device (1), a head piece (21) and a flexible connection hose (22), connecting the blower filter device (1) and the head piece to one another in a fluid-communicating manner. A computer (30) is separated in space from the blower filter system. The computer has a communication interface (31), which is designed to transmit data from the computer to the control unit (6) of the blower filter device and/or to receive data from the control unit of the blower filter device to the computer. The blower filter device has at least one communication interface (7) for transmitting data from the control unit to an external computer and/or for receiving data sent from an external computer to the control unit. A process is provided for checking and setting device-specific parameters of the blower filter device of the blower filter system.

Abstract: A reaction carrier (14), a measuring device (12) and a measuring method measure a concentration of gaseous/aerosol components of a gas mixture. The reaction carrier (14) has a flow channel (42) defining a reaction chamber (46) with an optically detectable reaction material (48) reacts with at least one component of the gas mixture or with a reaction product of the component. A humidity measuring element (84), of the reaction carrier (14), detects a humidity of the gas mixture flowing through the flow channel (42). The measuring device (12) has a humidity detection unit (85) that reads the humidity measuring element (84). A humidity determining unit (94) determines a humidity based on the detected humidity. The measuring method determines a humidity of the supplied gas mixture in the flow channel (42) and determines a concentration of the component on the basis of the optically detectable reaction and the measured humidity.