Gas measuring device and method for displaying information determined by the gas measuring device

Abstract

The invention relates to a gas measuring device (10, 20, 30) with a gas sensor (3), a first display unit (1, 21), and a control unit (4). The control unit (4) is configured to determine a hazardous state based on a gas measurement value from the gas sensor (3). The first display unit (1, 21) can be controlled to display information related to the hazardous state. The gas measuring device (10, 20, 30) is characterized in that a second display unit (2, 22) can be controlled to display status information about an internal device status, wherein the control unit (4) is configured to determine the status information. Furthermore, the invention relates to a method for displaying information determined by a gas measuring device (10, 20, 30), wherein the gas measuring device (10, 20, 30) has a first display unit (1, 21) and a second display unit (2, 22).

Description

[0001] The present invention relates to a gas measuring device having a first and a second display unit and a method for displaying information determined by the gas measuring device.

[0002] Gas measuring devices are suitable for detecting one or more gases or vapors in the environment and determining a measured value. As well as providing information about a hazardous situation using the measured value or values, the hazardous situation indicates whether or not a hazardous situation, for example a dangerous gas concentration, exists. In the case of a hazardous situation, the type of hazard is indicated, for example danger of poisoning, and in the case of no hazardous situation, only the current gas measured values are displayed. To indicate the hazardous situation, the gas measuring device comprises at least one gas sensor that reacts to one or more gases or vapors and generates a measured value. The gas sensors can use different measuring principles, such as electrochemical or catalytic gas sensors or infrared gas sensors.Furthermore, the gas measuring device usually comprises a display unit, such as an LED, a horn and / or a display.

[0003] Gas measuring devices are available in different designs with different properties and various gas sensor configurations. To distinguish between the various designs, the gas measuring device usually includes a marking that provides the following information, for example: a type designation, the type of gas sensors installed and / or the gases that can be measured, standards and / or guidelines that the gas measuring device complies with, and / or characteristic properties of the gas measuring device, such as a permissible temperature range and a degree of protection. Such information provides the user of the gas measuring device with important information about whether the gas measuring device is suitable for their application and under which conditions the gas measuring device should be operated. The marking should be clearly visible and, ideally, visible at all times so that the user can easily see it and pay attention to the information accordingly.

[0004] In the prior art, one or more stickers are usually used to label a gas measuring device. The stickers are manufactured or printed with the relevant information and affixed to the gas measuring device during the production process. Furthermore, it is common for the user to provide additional labeling for the gas measuring device. This is particularly true for the gas sensors with which the gas measuring device is equipped, as the user can change these themselves and thus identify which gas sensors are currently included in the gas measuring device and / or which gases can be measured with the current gas measuring device. Stickers are also frequently used, for example, with a label or a color code that indicates the installed gas sensors or measurable gases.A significant disadvantage of these solutions is that the information cannot be changed, or can only be changed with great effort and manually. If, for example, the gas sensor configuration and / or the list of standards and / or guidelines complied with by the gas measuring device changes, the stickers must be removed and new stickers with the latest information attached. This incurs costs and is time-consuming. Furthermore, the information may be incorrectly changed or not changed at all. In such cases, it is difficult or impossible for the user to determine from the gas measuring device itself whether the gas measuring device is suitable for a specific application. This may result in the application having to be aborted or repeated with a suitable gas measuring device.

[0005] Based on the solutions known from the prior art and the disadvantages described above, the object of the invention is to create a gas measuring device that efficiently provides the user with current information related to the gas measuring device, wherein the information relates to an internal device status. Changes to the information should be provided as promptly as possible.

[0006] The above object is achieved by a gas measuring device having the features of claim 1 and a method according to claim 9. Further details of the invention emerge from the dependent claims, the description, and the drawings. Features and details described in connection with the gas measuring device according to the invention also apply in connection with the method according to the invention, so that with regard to the disclosure of the individual aspects of the invention, reference is always made, or rather can be made, to each other.

[0007] The gas measuring device according to the invention comprises a gas sensor, a first display unit, and a control unit. The gas measuring device can comprise a single gas sensor or a plurality of gas sensors. The control unit is configured to determine a hazardous state based on a gas measurement value from the gas sensor. Furthermore, the first display unit can be controlled by the control unit such that information relating to the hazardous state can be displayed. According to the invention, the gas measuring device is characterized in that a second display unit is provided and can be controlled such that status information about at least one internal device status can be displayed, wherein the control unit is configured to determine this status information.

[0008] The gas measuring device according to the invention can comprise one or more gas sensors. A gas sensor is understood to be a sensor for detecting one or more gases or vapors. The gas sensors can employ different measuring principles and can be designed, for example, as electrochemical or catalytic gas sensors, infrared sensors, or photoionization detectors (PID).

[0009] A control unit is a unit capable of determining and / or processing data, such as gas measurements and internal device states, and generating a control signal, for example, for a display unit. The control unit may comprise one or more computing units, each comprising, for example, a processor, a microprocessor, or a field programmable gate array (FPGA). Multiple computing units may be interconnected via an interface for data exchange. Furthermore, it is conceivable for the computing units to be spatially separated from one another, for example, mounted on different circuit boards.

[0010] The gas measuring device is capable of generating a gas measurement value using the gas sensor. The control unit is configured to determine a hazardous condition based on the gas measurement value. A hazardous condition exists, for example, in the case of a gas alarm, if the gas measurement value is greater or less than a limit value. Furthermore, the control unit is configured to control the first display unit such that the first display unit displays information related to the hazardous condition. The first display unit comprises components for acoustic and / or haptic output and / or for optical display, for example a horn, a vibration motor, an LED (light-emitting diode), and / or a display. The first display unit preferably comprises at least one LED. The first display unit particularly preferably comprises a display, a horn, and at least one LED.

[0011] The type of information output related to the hazardous condition indicated by the first display unit depends on the respective component of the first display unit. In the case of a gas alarm, for example, the display indicates the gas alarm, indicating the type of gas alarm and / or the deviation of the measured gas value from the limit value. Furthermore, the horn, the vibration motor, and / or the at least one LED are activated at least once, so that their visual, haptic, and / or acoustic signals are perceptible to the user.

[0012] In the event of a non-existent gas alarm, i.e. in the case where the determined hazard state indicates that no dangerous situation exists, the display only shows the current gas measurement value as information related to the hazard state. Furthermore, the horn, the vibration motor and / or the at least one LED are inactive in this case. It is conceivable that the horn, the vibration motor and / or the at least one LED are also active at least once in this case. However, the type of information output, i.e. the activation of the horn, the vibration motor and / or the at least one LED, is different from the previously described activation in the case of a present gas alarm. In any case, the information output related to the hazard state is designed in such a way that it can be distinguished by the user according to the determined hazard state.

[0013] The control unit is additionally configured to determine status information about an internal device status and to control the second display unit such that the second display unit displays this status information. The internal device status comprises information and / or current properties relating to the hardware and / or software of the gas measuring device, such as a configuration, sensor configuration, an error status and / or standard conformity. The control unit determines the status information at least partially based on data stored on the gas measuring device. The status information is determined, for example, based on configuration settings of the gas measuring devices, whereby these configuration settings can be changed by the user.Furthermore, the determination of the status information relates to a test of a specific condition, a property of the gas measuring device, in particular a property that can be changed, and / or a comparison of configuration settings. Preferred embodiments of the determination of the status information are explained in the further course of the description.

[0014] It is also conceivable that the control unit determines the status information at least partially based on data that the gas measuring device requests from an external communication partner. The external communication partner can, for example, be a control room that provides data related to the gas measuring device.

[0015] The second display unit preferably comprises a display for displaying the status information. Particularly preferably, the second display unit is attached together with the first display unit on or in a housing of the gas measuring device. For example, the first display unit is arranged on a first side of the housing and the second display unit is arranged on a second, opposite side of the housing of the gas measuring device. Furthermore, it is conceivable for the second display unit to be attached to another housing of the gas measuring device, wherein the gas measuring device comprises at least two housings that are spatially separated from one another. For example, a gas sensor, a first computing unit and the first display unit are arranged on or in a first housing, and a second computing unit and the second display unit are arranged on or in a second housing.The control unit therefore comprises two computing units that are connected to each other via an interface for data exchange.

[0016] The particular advantage of the gas measuring device according to the invention is that, in addition to information relating to a gas measurement value, the user is provided with status information, i.e., information relating to an internal device status, which is determined and displayed, wherein the status information indicates the current internal status of the gas measuring device. The control unit of the gas measuring device determines the status information and controls the second display unit to display the determined status information. This advantageously ensures that the current internal status of the gas measuring device is always efficiently recognizable for the user, wherein changes in the internal status are apparent to the user through the determination of the status information and the display by means of the second display unit.

[0017] Furthermore, the first and second display units are advantageously independent of each other, allowing their embodiments to be flexibly adapted to the respective application. For example, the maximum energy consumption, the size, and / or the area of application of the gas measuring device can be taken into account.

[0018] According to a preferred embodiment of the gas measuring device, the second display unit is a bistable display unit. Furthermore, the second display unit preferably comprises an electronic paper, also referred to as e-paper, e-paper, or ePaper. A bistable display unit and a display unit comprising an electronic paper are understood to mean a display unit that retains its state without an applied voltage. Previously displayed information therefore continues to be displayed even when the display unit is in de-energized operation. The bistable display unit is preferably a display whose pixels retain their state when the maintenance voltage or operating voltage is removed.

[0019] A gas measuring device with a second display unit in the form of a bistable display unit or a display unit comprising an electronic paper has the advantage that the information from the second display unit, i.e., the status information about the internal device status of the gas measuring device, is visible to the user at all times. This even applies when the gas measuring device is not in operation, i.e., switched off or disconnected from a power supply. Thus, even when the gas measuring device is switched off or de-energized, the user can use the status information to check whether the gas measuring device is suitable for a specific application.Furthermore, the bistable display unit and the display unit with an electronic paper offer the advantage of being energy-saving, which is particularly beneficial for battery-operated gas measuring devices, which can then be operated for longer periods. A particular advantage of an electronic paper is its high-contrast display, simple control, and low cost compared to a standard display.

[0020] In a preferred embodiment of the gas measuring device, the control unit is configured to detect a gas sensor configuration, a device identification, a device property, a software version, a configuration, and / or standard compliance, and to determine the status information based thereon and display it on the second display unit. Advantageously, the control unit is configured to determine different internal device states.

[0021] The gas sensor configuration indicates which gas sensors the gas measuring device includes or which gas sensors are currently configured to measure gas. The control unit is configured to detect which gas sensors the gas measuring device includes or which gas sensors are currently activated for measurement and uses this to determine status information that indicates which gases can be measured by the gas measuring device or which gases are being measured.

[0022] The device identification indicates the type and / or version of a gas measuring device. The device identification can change, for example, after a repair of the gas measuring device, in which case a circuit board of the gas measuring device is replaced, or when the gas measuring device is expanded with an additional component. An additional component can, for example, be a component for wireless communication or a component with a pump for sucking ambient air to the sensor. The control unit is configured to detect the device identification, for example by checking the version of the circuit board and using this version to determine the type and / or version of the gas measuring device, with the assignment being stored in the gas measuring device, for example, in the form of a table.Furthermore, the control unit is configured to detect the device identification, for example by detecting additional components attached to the gas measuring devices and determining the type of the gas measuring device, wherein, for example, the possible types of the gas measuring device with the respective additional components are stored in tabular form.

[0023] The device property indicates the extent to which the gas measuring device is operational, for example, the battery status or an error state of the gas measuring device. The control unit is therefore configured, for example, to detect the battery status and use this to determine whether and for how long the gas measuring device can be used. Furthermore, the control unit is configured, for example, to detect whether and which errors are currently present and use this to determine whether the gas measuring device is operational despite any errors that may have occurred. These errors can be hardware-related errors, such as a defective component or a detected drop of the gas measuring device, or software-related errors, such as a failed adjustment of the gas sensors or an expired interval.In an advantageous manner, the user of the gas measuring device can therefore determine whether the gas measuring device has sufficient energy capacity for a certain period of use or whether the gas measuring device is operational.

[0024] Standard conformity indicates which standards and / or guidelines the gas measuring device can meet and / or which standard the gas measuring device is designed according to. The control unit is set up to determine which standards and / or guidelines are met and / or implemented. To do so, the control unit checks, for example, the configuration settings and / or the software version of the gas measuring device. Certain standards and / or guidelines require certain configuration settings of the gas measuring device. The control unit compares the current configuration settings of the gas measuring device with the required configuration settings that are necessary to meet a standard and / or guideline and determines those standards and / or guidelines that the gas measuring device currently meets. The control unit also checks, for example, which standards and / or guidelines the current software version of the gas measuring device meets.In practice, it may happen that different software versions comply with different standards and / or guidelines, particularly if approval has only been granted for certain software versions, or if requirements regarding the standards and / or guidelines change. The control unit therefore detects the current software version and determines the standards and / or guidelines currently met by the gas measuring device, with an assignment of the respective software version to the met standards and / or guidelines is stored, for example, in tabular form. The user of the gas measuring device can therefore advantageously check whether the standards and / or guidelines met by the gas measuring device comply with the standards and / or guidelines required by its application.

[0025] Advantageously, the control unit determines, as described in the previous paragraphs, the current status information, which is then displayed on the second display unit, so that the user can see the current internal device status of the gas measuring device and can accordingly assess whether the gas measuring device is suitable for a specific application scenario.

[0026] According to a preferred embodiment of the gas measuring device, the control unit is configured to compare currently determined status information with previously determined status information. Furthermore, if a difference is detected between the current status information and the previously determined status information, the second display unit can be controlled to display the current status information instead of the previously determined status information. Advantageously, the second display unit is controlled as needed, i.e. in the case in which currently determined status information about the internal device status of the gas measuring device differs from previously determined status information that is already displayed on the second display unit. This represents a particularly efficient way of providing and displaying information.Furthermore, the control unit is preferably configured to determine the status information during a device power-on process and / or a device power-off process. This also contributes to an efficient manner of providing information.

[0027] In a preferred embodiment of the gas measuring device, the control unit is configured to detect a device configuration change and, upon a device configuration change, to determine the status information. The device configuration change occurs, for example, through a user input on the gas measuring device or through an external configuration application. The device configuration change includes, for example, a change in the setting of the gas measuring device. Advantageously, the determination of the status information thus takes place immediately adjacent to the time at which the probability of a change in the status information is high.

[0028] According to a preferred embodiment of the gas measuring device, the second display unit can be controlled such that the second display unit alternately displays different information. In this case, the different information particularly comprises status information determined by the control unit. This different information is divided up by the control unit, whereby the amount of each divided information depends on the size of the second display unit, and is displayed alternately on the second display unit at intervals, for example every five seconds. The interval should be selected and implemented by the control unit such that it gives the user sufficient time to grasp all of the information currently being displayed on the second display unit. The information is advantageously presented on the second display unit in a clear and easily perceptible manner.

[0029] Furthermore, the invention relates to a method for displaying information determined by a gas measuring device, wherein the gas measuring device has a first display unit and a second display unit, comprising the following steps: - Determining a hazardous condition based on a gas measurement value from a gas sensor of the gas measuring device, - Display of information related to the danger state on the first display unit, - Determining status information about an internal device status, and - Display of status information on the second display unit.

[0030] Determining the hazardous state involves, for example, comparing the measured gas value with a limit value to determine whether a gas alarm is present. Based on the hazardous state, information is output on a first display unit. The first display unit is suitable, for example, for outputting a visual signal, an acoustic and / or a haptic information and informing the user of the gas measuring device about the hazardous state. Determining the hazardous state is carried out by a control unit of the gas measuring device, which, as previously described, can comprise one or more computing units. Determining the hazardous state and displaying the information on the first display unit is repeated, for example, every second, provided the gas measuring device is switched on.

[0031] In addition to the hazardous state, the control unit determines status information. For example, the control unit checks the configuration settings of the gas measuring device for compliance with certain requirements to meet a standard and / or directive and determines status information indicating which standards and / or directives the gas measuring device currently meets. Furthermore, the control unit detects, for example, the active gas sensors and determines status information indicating which gases are currently being measured. The control unit controls the second display unit so that it displays the status information.The determination of the status information and the display of the status information on the second display unit are repeated, for example, as needed, i.e., when a setting of the gas measuring device is changed and / or during certain events, such as switching the gas measuring device on and off. Preferably, the second display unit is designed such that the status information is also displayed when the gas measuring device is switched off. The second display unit comprises, for example, an electronic paper, which displays information even when the power is off.

[0032] The method according to the invention offers the particular advantage that both information related to a gas measurement value is determined and displayed, as well as status information about the internal device status of the gas measuring device. Furthermore, the status information is updated, so that the user is informed whether the gas measuring device is suitable for its intended use in its current state.

[0033] Further features, objects, and effects of the invention will become apparent from the following description of specific embodiments and the accompanying figures. Embodiments of the invention are described without limiting the general inventive concept.

[0034] In the figures shows: Fig. 1: a schematic block diagram of an embodiment of the gas measuring device according to the invention, Fig. 2: a schematic representation of an embodiment of the gas measuring device according to the invention, and Fig. 3: a schematic representation of another embodiment of the gas measuring device according to the invention.

[0035] Embodiments of the invention are described in detail below with reference to the accompanying figures. Similar components are provided with the same reference numerals in several figures.

[0036] Fig. Figure 1 shows a preferred embodiment of the gas measuring device 10 according to the invention using a schematic block diagram with a control unit 4, which is electronically connected to a first display unit 1 and a second display unit 2. The first display unit 1 comprises a red and a green LED and a horn. The second display unit 2 comprises an electronic paper, also called e-paper or ePaper. The gas measuring device further comprises a gas sensor 3, in this case an electrochemical gas sensor for measuring an oxygen concentration, which is electronically connected to the control unit 4. The aforementioned electronic connections are shown as dashed lines.

[0037] The control unit 4 of the gas measuring device 10 is configured to determine a hazardous condition based on a gas measured value from the gas sensor 3. In doing so, the control unit 4 compares the gas measured value with a limit value, whereby a gas alarm is triggered if the limit value is undershot. If the gas measured value is lower than the limit value and a gas alarm is present, the control unit 4 controls the first display unit 1 such that the red LED and the horn signal the gas alarm. If the gas measured value is lower than the limit value and there is no gas alarm, the control unit 4 controls the first display unit 1 such that the green LED is activated to signal that there is no gas alarm. Advantageously, a user (not shown) can thus directly recognize whether a gas alarm is present or not.

[0038] The control unit 4 is further configured to determine status information about an internal device status of the gas measuring device 10 and to control the second display unit 2 to display this status information. The control unit 4 is capable of determining various status information, in particular gas sensor configuration and / or standard compliance.

[0039] The control unit 4 detects that the gas measuring device comprises an electrochemical gas sensor 3 and that the sensor is currently measuring an oxygen concentration. The control unit 4 detects, for example, via a plugged-in detection, that the gas sensor 3 is physically plugged in and that the gas sensor 3 is generating oxygen gas measurements.

[0040] The control unit controls the second display unit 2 in such a way that this status information is displayed. In this case, the status information that an oxygen concentration is currently being measured. For example, the molecular formula of oxygen appears on the second display unit 2.

[0041] Furthermore, the control unit 4 detects current configuration settings and the version of the software installed on the gas measuring device 10 that influence compliance with a standard and / or guideline. An assignment of which standards and / or guidelines are met with which software version and with which configuration settings is stored in the gas measuring device 10. The control unit 4 thus uses this assignment to determine which standards and / or guidelines are currently met and controls the second display unit 2 such that it displays the met standards and / or guidelines in the form of text or symbols.

[0042] Advantageously, the gas measuring device 10 determines the current internal device state of the gas measuring device 10 and displays it on the second display unit 2. This allows a user to efficiently evaluate whether the gas measuring device 10 is suitable for their application.

[0043] Fig. Figure 2 shows a schematic representation of a preferred embodiment with two views of the gas measuring device 20 according to the invention, showing the top view of the front side 20a and the top view of the rear side 20b of the gas measuring device. The gas measuring device comprises a first display unit 21 and a second display unit 22, which are mounted in a single housing of the gas measuring device 20. Furthermore, the gas measuring device comprises three gas inlets 23 for three electrochemical gas sensors (not shown) for measuring an oxygen concentration, a hydrogen sulfide concentration, and a carbon monoxide concentration, as well as two buttons 24 for operating the gas measuring device by a user.

[0044] The gas measuring device 20 comprises, like the gas measuring device 10 in Fig. 1, a control unit 4. The control unit 4 is configured to determine a dangerous state on the basis of the gas measured values of the three gas sensors (not shown) and to control the first display unit 21 in such a way that information relating to the dangerous state is displayed.

[0045] The determination of the danger state by the control unit and the control and display of the first display unit 21 is essentially carried out as described in the description of Fig. 1. In contrast to the gas measuring device 10 in Fig. 1 comprises the display unit 21 of the gas measuring device 20 in Fig. 2, a display 21, which can also be controlled to show information related to the hazardous condition. The display 21 is capable of indicating which of the three gas sensors is in a gas alarm condition and what type of gas alarm it is: warning, pre-alarm, or main alarm.

[0046] The determination of the status information by the control unit and the control of the second display unit 22, which also comprises an electronic paper, is carried out in accordance with the description of the gas measuring device 10 in Fig. 1. The second display unit 22 is controlled by the control unit in such a way that it displays the molecular formulas of the gases currently being measured, in this case oxygen, hydrogen sulfide and carbon monoxide, as well as the standards and / or directives currently met by the gas measuring device 20, in this case a CE marking, a CSA marking and an EAC Ex marking for explosion-proof devices.

[0047] Fig. Figure 3 shows a schematic representation of a preferred embodiment of the gas measuring device 30 according to the invention, wherein the gas measuring device comprises a first housing 31 with the first display unit 21, the three gas sensor inlets 23 and the three gas sensors (not shown) as well as the two buttons 24 and a second housing 32 with the second display unit 22. The gas measuring device 30 essentially corresponds to the gas measuring device 20 in Fig. 2, with reference to the same components, see the description Fig. 2. In contrast to the gas measuring device 20 in Fig. 2, the control unit comprises a first computing unit 33 and a second computing unit 34, wherein the first housing 31 comprises the first computing unit 33 and the second housing 32 comprises the second computing unit 34. The two computing units 33, 34 are wirelessly connected to each other via an interface for data exchange. According to the description of Fig. 2, the control unit determines the danger state with the first computing unit 33 and controls the first display unit 21 to display information related to the danger state. Also according to the description of Fig. 2, the control unit uses the second computing unit 34 to determine the status information about the internal device status of the gas measuring device 30 and controls the second display unit to display this status information.

[0048] Advantageously, the first display unit 21 and the second display unit 22 of the gas measuring device 30 are in Fig. 3 spatially separated from each other, so that a user of the gas measuring device 30 is able to position the gas measuring device 30 according to the respective application in such a way that the status information and the information relating to a hazardous condition are easily perceptible and in accordance with the application. List of reference symbols 1 first embodiment of a gas measuring device 2 first embodiment of a first display unit 3 first embodiment of a second display unit 4 Control unit 10 first embodiment of a gas measuring device 20 second embodiment of a gas measuring device 20a Front of the gas measuring device 20b Back of the gas measuring device 21 second embodiment of a first display unit 22 second embodiment of a second display unit 23 gas sensor inlets 24 buttons 30 third embodiment of a gas measuring device 31 first housing of the gas measuring device 32 second housing of the gas measuring device 33 Control unit with a first computing unit 34 Control unit with a second processing unit

Claims

[1] Gas measuring device (10, 20, 30) with a gas sensor (3), a first display unit (1, 21) and a control unit (4), wherein the control unit (4) is configured to determine a dangerous state on the basis of a gas measured value of the gas sensor (3) and the first display unit (1, 21) is controllable in such a way that information relating to the dangerous state can be displayed, characterized by that a second display unit (2, 22) can be controlled in such a way that status information about an internal device status can be displayed, wherein the control unit (4) is set up to determine the status information. [2] Gas measuring device (10, 20, 30) according to claim 1, characterized by that the second display unit (2, 22) is a bistable display unit. [3] Gas measuring device (10, 20, 30) according to claim 1 or 2, characterized by that the second display unit (2, 22) comprises an electronic paper. [4] Gas measuring device (10, 20, 30) according to one of the preceding claims, characterized by that the control unit (4) is configured to detect a gas sensor configuration, a device identification, a device property, a software version, a configuration and / or a standard conformity and to determine the status information based thereon. [5] Gas measuring device (10, 20, 30) according to one of the preceding claims, characterized by that the control unit (4) is set up to compare a currently determined item of status information with a previously determined item of status information and that, if a difference is detected between the current status information and the previously determined status information, the second display unit (2, 22) can be controlled to display the current status information. [6] Gas measuring device (10, 20, 30) according to one of the preceding claims, characterized bythat the control unit (4) is configured to determine the status information during a device switch-on process and / or a device switch-off process. [7] Gas measuring device (10, 20, 30) according to one of the preceding claims, characterized by that the control unit (4) is configured to detect a device configuration change and to determine the status information when the device configuration changes. [8] Gas measuring device (10, 20, 30) according to one of the preceding claims, characterized by that the second display unit (2, 22) can be controlled in such a way that the second display unit (2, 22) displays different information alternately. [9] A method for displaying information determined by a gas measuring device (10, 20, 30), the gas measuring device (10, 20, 30) having a first display unit (1, 21) and a second display unit (2, 22), comprising the following steps: - Determining a hazardous condition based on a gas measurement value of a gas sensor (3) of the gas measuring device (10, 20, 30) - display of information related to the danger state on the first display unit (1, 21), - Determining status information about an internal device status, and - Display of the status information on the second display unit (2, 22).

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