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 sample collector is provided for receiving a breath gas sample and a gas sample testing device is provided with such a sample collector. The sample collector is configured for receiving from a person a breath gas sample to be investigated. The sample collector includes an inflow part (2) with an inflow opening (IO) and an outflow part (13) with an outflow opening (OO). The sample collector provides a flow duct guiding a gas sample from the inflow opening (IO) to the outflow opening (OO). The inflow part (2) is rigidly connected with the outflow part (13). The inflow part (2) and the outflow part (13) together form a housing which gas-tightly surrounds the flow duct. The inflow part (2) tapers in a direction towards the outflow opening (OO). The outflow part (13) tapers in a direction towards the inflow opening (IO).

Abstract: An electrochemical fuel cell measures ethanol in human breath and a process maintains such an electrochemical fuel cell. The electrochemical fuel cell includes a first electrode (1), a second electrode (2) and a third electrode (3). The first electrode (1) is used as a measuring electrode in a regular operating mode of the electrochemical fuel cell and as a measuring electrode or as a reference electrode in a maintenance mode of the electrochemical fuel cell. The second electrode (2) is used as a counter electrode in the regular operating mode of the electrochemical fuel cell and as a measuring electrode or as a reference electrode in the maintenance mode of the electrochemical fuel cell. The third electrode (3) is used as a counter electrode in the maintenance mode of the electrochemical fuel cell.

Abstract: A gas sensor for measuring concentration of a predetermined gas includes a light source (2) arranged to emit pulses of light, a measurement volume (10), a detector (4) arranged to receive light that has passed through the measurement volume (10), and an adaptable filter (6) disposed between the light source (2) and the detector (4). The gas sensor has a measurement state in which it passes at least one wavelength band which is absorbed by the gas and a reference state in which said wavelength band is attenuated relative to the measurement state. A controller is connected to each of the light source, the detector and the adaptable filter to change the adaptable filter between one of said measurement state and said reference state to the other at least once during a gas sensor operation period.

Abstract: A fixed bed (10) is provided for a fixed-bed reactor (100). The fixed bed (10) contains a particulate carrier and at least one reactive substance. The carrier is a silicate compound and the reactive substance is an organometallic pyridine compound. A method for preparing such a fixed bed is provided. The method includes the steps of preparing the carrier, preparing an impregnation and treating the carrier with the impregnation. In addition, a gas-measuring tube is provided with a correspondingly prepared fixed bed as well. A method uses organometallic pyridinium compounds, especially pyridinium dichromate, in a fixed-bed reactor for detecting alcohol compounds and for preparing formaldehyde and/or acetaldehyde.

Abstract: A data analysis system includes a gas measuring device (2), providing current data and/or historical data, which are stored in a memory (3), and a data processing unit (1). The data includes information on a gas measuring device time of data acquisition. The device transmits data to an interface configured to receive the data and to feed data to the data processing unit and/or to an additional memory (5). A data identification unit (6) is configured to add a specific identifier to the data and add a piece of information on a system time during the data transmission and/or the gas measuring device time during the data transmission. The data processing unit is configured to process the data provided by the gas measuring device and/or by the additional memory such that the system time and the gas measuring device time are taken into consideration.

Abstract: A process and an image evaluation system are provided with a mobile sensor arrangement, including a camera (IR), a motion sensor (IMU), and a receiver (Komm), that is moved through a spatial area. The camera generates an image sequence. The motion sensor generates an orientation signal with camera viewing direction in a predefined three-dimensional coordinate system when generating an image. A signal processing unit (Sv) checks whether the receiver is receiving a signal from a transmitter (UWB.1, UWB.2, UWB.3) of a transmitter group. If the receiver receives a signal, the signal processing unit determines the distance between the transmitter and the receiver. A classifier (Kl) searches for images of humans in images of the image sequence. The signal processing unit decides whether an image of a human shows a person associated with a transmitter of the transmitter group and may generate a trajectory describing the movement of the camera.

Abstract: A method for a multistep analysis of a measuring program of a portable gas measuring device includes performing a factory setting of the portable gas measuring device, connecting a container having a known gas standard and performing a reference measurement, wherein a multidimensional reference measurement is recorded, selecting a measuring program for target materials from a list on the device, performing a measurement on a sample in dependence on the selected measuring program, wherein a multidimensional measured variable is recorded, automatically performing an analysis to identify at least one of the one or more target materials in the sample and the respective concentrations thereof, wherein the analysis is based on the multidimensional measured variable from the measurement on the sample, the multidimensional reference measurement for the gas standard, the values for the plurality of target materials or measuring programs, and the factory setting for the portable gas measuring device.

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 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 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 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 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 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 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 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 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.