Abstract: An oxygen self-rescuer (100) includes a gas cartridge (110), a mouthpiece (120), a tube (130) connecting the gas cartridge and the mouthpiece, a breathing bag (140) hydrodynamically connected to the gas cartridge and to the tube, and a spring assembly (150) within the breathing bag. The spring assembly includes a spring (153) fastened to the breathing bag and/or to the gas cartridge. The spring assembly has a pretensioned spring state in an unused packed-up state of the oxygen self-rescuer. The spring assembly leaves the pretensioned spring state with an externally triggered transition from the unused packed-up state into a use expanded state of the oxygen self-rescuer such that the spring assembly uplifts the breathing bag and generates a vacuum within the breathing bag. The vacuum draws breathable gas into the breathing bag and prepares the breathing bag for a ventilation of a user of the oxygen self-rescuer.

Abstract: A safety helmet (100) includes an arched helmet shell (1), a bearing structure (3, 4.l, 4.r, 5, 6, 8, 10), an inner lining and a plurality of connection units. The inner lining comes into contact with the head of a user of the safety helmet. The bearing structure is attached on the inside to the helmet shell. Each connection unit is capable of detachably connecting the inner lining to the bearing structure. Each connection unit comprises a bearing structure-side component and an inner lining-side component. Each component is configured as exactly one connection type. A bearing structure-side component is connectable to an inner lining-side component if the two components are configured as the same connection type. The two components cannot otherwise be connected to one another or are incapable of establishing a connection between the bearing structure and the inner lining.

Abstract: A gas detection device and a process monitor an area for a combustible target gas. A heating segment of a detector (10) is heated when electrical current flows therethrough. A heating segment of a compensator (1) is heated when electrical current flows therethrough. An electrical voltage is applied to both the detector and the compensator. The heating of the detector (10) causes a combustible target gas to be oxidized in an interior of the gas detection device. A detection variable, which depends on the temperature (Temp_10) of the detector, and a detection variable, which depends on the temperature (Temp_11) of the compensator, are measured. A presence and/or a concentration of a target gas are determined as a function of the detection variables. A quality parameter is measured and increases as the detection variable depending on the detector temperature increases and as the detection variable depending on the compensator temperature decreases.

Abstract: A blower filter device (3) is connectable to a voltage supply unit (2) and includes a blower unit (5), a filter mount (14), an internal energy storage unit (7), an energy interface (9), a current limitation device (13), a sensor array (16, 17, 18) and a control device (6). The current limitation device is activated upon disconnecting the energy interface from the voltage supply unit. The activated current limitation device limits the intensity of a current from the energy interface to the internal energy storage device. Upon the voltage supply unit being connected to the energy storage device and a predefined deactivating event is detected, the control device deactivates the current limitation device. The deactivating event is based on a charging voltage of the internal energy storage unit and/or on a time period that has elapsed since the connection. A process is provided for operating such a blower filter device.

Abstract: A detection system with a two-step homogenizing device (1) and with a receiver (42). Viewed in a field direction (54) of a photon field, the homogenizing device (1) is located between a measurement area (44) and the receiver (42). The homogenizing device (1) includes a first diffuser (10) and a second diffuser (12). The first diffuser (10) generates an intermediate photon field from an input photon field. The second diffuser (12) generates an output photon field from the intermediate photon field. The receiver (42) generates signals depending on the incident photon field.

Abstract: A pump system (120) has a central pump unit (110), with which at least one hook-up unit (130). The at least one hook-up unit (130) is from a group of a plurality of hook-up units (130) that can be combined in modular form for setting an operating point of a pump (10) that forms the pump unit (110). A method uses such a hook-up unit (130) in a pump system (120) for setting an operating point of the pump unit (110) thereof. A medical device is provided with such a pump unit (110) or with such a pump unit (110) and at least one hook-up unit (130) combined with the pump unit (110).

Abstract: A process and a system analyze data of at least one mobile gas measuring device as well as of a stationary gas measuring device (3a, 3b). Data are generated by the mobile gas measuring device and by the stationary gas measuring device (3a, 3b) as a function of a gas concentration and are transmitted to a central data processing unit (1). Further, the data are supplemented with information in relation to a location of the data generation before, during or after the transmission. The processed data of the mobile gas measuring device and of the stationary gas measuring device (3a, 3b) are sent to a data analysis unit (2), in which a joint analysis of the processed data of the mobile gas measuring device and of the stationary gas measuring device (3a, 3b) is carried out for generating at least one result value.

Abstract: A diving apparatus (10) supplies breathing air (L) and includes a basic body (12), a tank interface (20), a pressure reducer (22), a mouthpiece interface (24), and a display device (30). The tank interface connects to a breathing air tank (90) for the inlet of breathing air into the diving apparatus. The mouthpiece interface is configured for connection of a mouthpiece (92) for the supply of breathing air from the diving apparatus. The pressure reducer is arranged in a gas path of the diving apparatus between the tank interface and the mouthpiece interface for reducing gas pressure. The display device includes a display instrument (32) and a display line (34). A holding element (40) is configured to detachable fasten the display line at the basic body. A diving system (100) is provided including the diving apparatus (10), a breathing air tank (90) and/or with a mouthpiece (92).

Abstract: A safety helmet (100) with a helmet shell (7), with a bearing element (5), with at least one holding element (2, 9.l, 9.r, 28) and with a tubular shape textile sheathing. Each holding element (2, 9.l, 9.r, 28) is permanently connected to the helmet shell (7). A distance is present between a holding element (2, 9.l, 9.r, 28) and the head of a user of the safety helmet (100). The bearing element (5) is adjacent to the head. The textile sheathing encloses the bearing element (5) and is located in some areas between the bearing element (5) and the head. The bearing element (5) is detachably connectable to a respective holding element through at least one connection opening in the textile sheathing. A process for removing the textile sheathing from the safety helmet (100), as well as to a process for manufacturing a safety helmet (100) are provided.

Abstract: A gas sensor (2) distinguishes between a target gas and a contaminant and includes a light source (8), a measurement volume (4), a detector (22), and an adaptable filter system (20) with a first optical filter and a second optical filter. The filter system switches between a first composite state, with both filters in a reference state, a second composite state, with the first filter in a first reference state and the second filter in a second measurement state, a third composite state with the first filter in a first measurement state and the second filter in a second reference state, and a fourth composite state, with both filters in a measurement state. The gas sensor detects a target gas and makes a determination as to a presence of the contaminant by comparing the respective detector signals, generated during at least three of the composite states, with each other.

Abstract: A housing (10) for a closed-circuit breathing apparatus (100) is provided for mounting respirator components (110) in an interior (40) thereof. The housing (10) includes a housing mount (20) and a housing cover (30) for covering the interior (40). The housing mount (20) has a first partial section (52) of at least one passage opening (50) for passage of a breathing tube (120) into the interior (40). The housing cover (30) has a second partial section (54) of this passage opening (50). The housing mount (20) and/or the housing cover (30) further have/has a fastening section (60) for the mechanical fastening to a counter-fastening section (122) of the breathing tube (120), which breathing tube (120) is guided through the passage opening (50).

Abstract: A process and an activation device (30) provides a user (B) activation of a drug measuring device (100). This drug measuring device includes an input unit (3), a testing unit (6) for testing given samples and an image recording device (12). The activation device (30) receives an activation image set (InB), which was generated by the drug measuring device or by a drug measuring device and at least one image (40, 40.1) from the image recording device. The received activation image set is checked as to meeting a predefined release criterion. For this the activation image set is compared with a predefined reference image set (35) for the user. If the release criterion is met, the drug measuring device is released for the user. An activation data set (32) for the user is completed by at least one image of the activation image set, which shows the user.

Abstract: A safety helmet (100) includes a helmet shell (7), with a bearing support structure (2, 5, 9, 21), with a helmet-side coupling point and with a module adapter (1). The bearing support structure (2, 5, 9, 21) is fastened to the helmet shell (7) on an inside. A helmet-side adapter coupling point of the module adapter (1) can be connected detachably to the safety helmet-side adapter coupling point of the module adapter (1). The module adapter (1) holds a module at the safety helmet (100). A process for fastening a module detachably to a safety helmet (100).

Abstract: A gas detection device and process detect a target gas for monitoring an area for the target gas. A radiation source emits electromagnetic radiation (50) that penetrates the area and impinges on an array of filters (15, 25) that distributes the impinging radiation (50) onto a first gas photosensor (35), a second gas photosensor (37) and a reference photosensor (36). The first gas photosensor (35) is only sensitive to radiation in a first wavelength range, the second gas photosensor (37) is only sensitive to radiation in a second wavelength range and the reference photosensor (36) is only sensitive to radiation in a reference wavelength range. The wavelength ranges are spaced apart from one another. An analysis unit (10) analyzes signals [Sig(35), Sig(36), Sig(37)] from the three photosensors (35, 36, 37) and carries out three pair comparisons to determine whether or not the target gas is present.

Abstract: A liquid electrolyte, for an electrochemical gas sensor for detecting NH3 or gas mixtures containing NH3, contains at least one solvent, one conductive salt and/or one organic mediator. The conductive salt is an ionic liquid, an inorganic salt, an organic salt or a mixture thereof. The electrolyte preferably is comprised of (I) water, propylene carbonate, ethylene carbonate or a mixture thereof as solvent; (ii) LiCl, KCl, tetrabutylammonium toluenesulphonate or 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate as conductive salt; and (iii) tert-butylhydroquinone or anthraquinone-2-sulphonate as organic mediator.

Abstract: A cooling element (100) for use within a cooling device (600) of a closed-circuit respirator (690), includes a plate shaped cooling element housings (110, 120), each with a respective liquid-tight closure (112, 122) filled or to be filled with a coolant (211). The cooling element housings (110, 120) each have a plate outer wall (114, 124) and a plate inner wall (116, 126) arched in the direction of the plate outer wall, which form, together with additional side walls (115, 125), cooling element volumes (118, 128) for the coolant. The plate shape cooling housings can be fastened or are fastened to each other such that the one plate inner wall and another plate inner wall are located opposite each other and are arched away from one another.

Abstract: A detection system (100) detects at least ethanol in human sweat. The detection system (100) includes at least one sensor (105) that is an electrochemical gas sensor. The at least one sensor (105) is configured at least for the detection of ethanol. The detection system (100) further includes a measuring chamber (107), in which substances excreted by the user via the user's skin can be fed via a waterproof, gas-permeable diffusion membrane to the at least one sensor (105). The detection system (100) further includes at least one seal (127), which is configured to be brought into direct contact with the skin of a user and to protect at least the measuring chamber (107) from environmental effects.

Abstract: A process and system analyze data provided by a mobile gas measuring device (3a) for generating an alarm. An alarm management system implements the process and system. The measured data are transmitted to another gas measuring device and/or to a data processing unit (1) and are compared to a limit value. If a limit value violation is detected, an alarm control signal is generated for implementing an instruction for action. A hazard potential is determined and is assigned to the limit value violation in the gas measuring device, the other device, and/or in the data processing unit, taking into consideration weighted influencing variables. Upon a first limit value violation and a second limit value violation being determined, the hazard potentials of these violations are compared and a prioritization is determined based on the comparison. The generation of the alarm control signals is carried out based on the determined prioritization.

Abstract: A preflushing unit (10) preflushes a breathing gas circuit (210) of a closed-circuit respirator (200). A basic body (20) has an inlet port (22), feeding breathing gas from a breathing gas supply (220), an outlet port (24) discharging breathing gas into the breathing circuit, and a flow section (32) fluid connecting a valve chamber (30). A valve body (40) with a sealing surface (42) is arranged in the valve chamber (30). An elastomer body (50) with a counter-sealing surface (52) in the valve chamber, fluid tight separates the flow section from a control section (34). The counter-sealing surface acts with a sealing force against the valve body for sealing the flow section. A control port (26) of the basic body provides a controlled feed of breathing gas from the breathing gas supply into the control section for pressure equalization between the flow section and the control section.

Abstract: A heat tone sensor includes a housing with a gas inlet and with a gas outlet as well as a device for generating a gas stream of a gas to be tested between the gas inlet and the gas outlet. A measuring element, around and/or through which the gas stream flows, is configured to catalytically burn at least a portion of the gas stream and to send a measurement signal. The measurement signal indicates a quantity of heat released in the process.