The invention concerns a method for detection of the concentration of at least one gaseous target substance (10) in a gas or a gas mixture (20), especially air, wherein: a) a first measured value (11) of the concentration of the at least one gaseous target substance (10) is saved as the first measured value (11) in a predetermined way and then b) the at least one target substance (10) is kept away from the sensor (1) with a gas shielding device (2) for a predetermined period of time, so that the concentration of the at least one target substance (10) measured by the sensor changes, c) before the end of the shielding of the sensor (1), the magnitude of the measured concentration and/or the direction of the change in concentration of the gaseous target substance (10) as detected by the sensor (1) is saved as the second measured value (12), d) the sensor (1) is then exposed again to the gas (20) with the at least one gaseous target substance (10), while e) on the basis of the difference between the first measured value (11) and the second measured value (12), an actual concentration of the at least one gaseous target substance (10) in the gas (20) is determined by means of a calculator (30). The invention also concerns a gas monitoring device and a use of such a device.
The invention concerns a method for detection of the concentration of at least one gaseous target substance (10) in a gas or a gas mixture (20), especially air, wherein: a) a first measured value (11) of the concentration of the at least one gaseous target substance (10) is saved as the first measured value (11) in a predetermined way and then b) the at least one target substance (10) is kept away from the sensor (1) with a gas shielding device (2) for a predetermined period of time, so that the concentration of the at least one target substance (10) measured by the sensor changes, c) before the end of the shielding of the sensor (1), the magnitude of the measured concentration and/or the direction of the change in concentration of the gaseous target substance (10) as detected by the sensor (1) is saved as the second measured value (12), d) the sensor (1) is then exposed again to the gas (20) with the at least one gaseous target substance (10), while e) on the basis of the difference between the first measured value (11) and the second measured value (12), an actual concentration of the at least one gaseous target substance (10) in the gas (20) is determined by means of a calculator (30). The invention also concerns a gas monitoring device and a use of such a device.
A coupling device for a breathing apparatus, characterized in that a connecting device is inseparably connected to the regulator hose, and can be coupled with at least two couplers, each having a flow check valve, for connection to a breathing gas source. Other aspects are described and claimed.
An electrochemical gas sensor, particularly for the detection of ammonia and/or amines, with an ionic fluid as an electrolyte, wherein the ionic fluid contains at least one protic ammonium cation with at least one dissociable hydrogen atom, whereby the at least one protic ammonium cation reacts with the ammonia and/or amines to be measured via deprotonation. The present invention also relates to the use of such a gas sensor.
Described herein are arrangements and methods for achieving intrinsic safety for a radio transmission module. One aspect provides an apparatus for transmitting signals in an explosion-hazardous area with intrinsic safety, including: a radio transmission module having a high frequency module and an electronic control circuit disposed on a printed circuit board, said electronic control circuit being configured to control a voltage supply to the high frequency module in response to one or more of: output voltage of the high frequency module exceeding a predetermined voltage value, as independently measured by at least two independently operating hardware circuits; and a temperature of a heat-conducting potting compound potted over heat generating components disposed on the printed circuit board exceeding a predetermined temperature value, as independently sensed by at least two independently operating temperature circuits. Other embodiments are described.
The invention relates to an artificial lung for simulating the stress by a user when testing a breathing apparatus, particularly a compressed air breathing apparatus, comprising a housing, which surrounds a pulmonary space for the breathing air and has a connection for supplying the breathing air to the breathing apparatus. In order to be able to variably control the volume flow for generating a certain respiration curve, the housing (2) surrounding the pulmonary space for the breathing air is provided with an inlet (5) and with an outlet (6) for the breathing air, a fan (7, 8) is connected to the inlet and outlet (5, 6), respectively, for supplying and removing the breathing air, and a cover (13), which can be actuated by way of a drive (16) and encloses the pulmonary space (3), is disposed in the housing (2), which cover controls the volume flow of the breathing air between the inlet (5) for the breathing air and the connection (4) for the supply of the breathing air to the breathing apparatus, and/or between the connection (4) and the outlet (6) for removing the breathing air, so as to generate the breathing curve.
A62B 27/00 - Methods or devices for testing respiratory or breathing apparatus
G09B 23/28 - Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes for medicine
7.
ELECTROCHEMICAL GAS SENSOR WITH AN IONIC LIQUID ELECTROLYTE SYSTEM INCLUDING AT LEAST ONE MONOALKYLAMMONIUM, DIALKYLAMMONIUM, OR TRIALKYLAMMONIUM CATION
An electrochemical gas sensor includes an ionic liquid as electrolyte. The ionic liquid includes at least one cation selected from the group of a monoalkylammonium cation, a dialkylammonium cation, and a trialkylammonium cation. The individual alkyl groups of the cation can be branched or unbranched and have 1 to 4 carbon atoms. The individual alkyl groups of the cation can be the same or different in case of the dialkylammonium cation and the trialkylammonium cation. In a number of embodiments, the individual alkyl groups have 2 to 4 carbon atoms.
G01N 27/49 - Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species
8.
ELECTROCHEMICAL GAS SENSORS WITH IONIC LIQUID ELECTROLYTE SYSTEMS
An electrochemical gas sensor includes an electrolyte including at least one ionic liquid which includes an additive portion including at least one organic additive, at least one organometallic additive or at least one inorganic additive.
G01N 27/49 - Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species
G01N 27/413 - Concentration cells using liquid electrolytes
9.
CIRCUITRY FOR POWER LIMITING OF AN ELECTRONIC ASSEMBLY
Circuitry for power limiting of an electronic assembly comprises units for power generation, for voltage amplification and for power limiting. In known apparatus the power limiting unit is populated with resistors and Zener diodes which are only conditionally useful due to the large amount of heat occurring in case of a fault. The invention provides that the power limiting unit (27) has a voltage detector (31, 32) to determine any over-voltage and to output a switching signal if a threshold value of over-voltage is exceeded, and in the supply line (22) between the power supply unit (21) and the voltage amplifier unit (25) there is a switching element (23, 24) connected to the voltage detector (31, 32) via a switch-off line (29, 30).
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
H02H 9/00 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
The invention relates to an electrochemical sensor (1), comprising a housing (11) with a chamber containing an electrolyte (9), at least one measuring electrode (2a) for oxygen detection, at least one counter electrode (2b) and at least one reference electrode characterised in that the sensor (1) has a two-part diffusion barrier, wherein a first part (12) of the barrier forms a labyrinth with a second part (6) of the barrier disposed between the measuring and the counter electrode (2a, 2b).
G01N 27/49 - Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species
11.
ARRANGEMENT FOR DETACHABLY CONNECTING A RESPIRATOR MASK TO A HARD HAT
A holder for detachably connecting a respirator mask (6) to a hard hat (1) comprises on both sides two separate upper and lower holding elements (8, 10), respectively individually adjustable in length, running away from each other from the respirator mask towards the hard hat in a V-shape, which elements are articulated at the ends - with respect to the pivot point (14) of the hard hat - via upper and lower rotary coupling points (7, 9), which are realized either by pivotal points or by a flexurally slack formation of the holding element, on the hard hat, and via upper and lower rotary coupling points (13, 15) on the mask. The lower holding element runs substantially horizontally and the upper holding element runs tangentially upwards, so that both the chin region and the forehead region of the respirator mask can be pressed individually onto the face of the user. The upper helmet-side coupling point is closer to the pivot point (14) than the lower rotary coupling point. The fit of the mask remains essentially uninfluenced even when the helmet moves. On the hard hat the holding elements are fastened via a connecting yoke (3) torsion-resistantly suspendable on the helmet and via a mask binding part (12) on the mask.
The invention relates to a respiratory half mask with side straps (4) attached to a head support (3) and forming a single loop, a strap guide part (2) that is connected to a mask body (1) being held on said straps during an usage position on the face or in a position that is removed from the face and displaced downward, comprising a clamping element (26) that is attached to the strap guide part (2) for clamping the side straps (4) to the strap guide part (2) and for securely fixing the mask body (1) in the usage position.
The invention relates to a mask body for a respiratory half-mask, having a substantially rigid installation plate (4) incorporated into the soft elastic material of the mask body (1) and comprising a fastening cylinder (8) integrally molded thereto, having latching tabs (9) and pivot-proof projections (10) for the production of a stable, removable plug-in connection to a holding device that is connected to a strap. The connection of the installation plate to the mask body material is carried out by means of a narrow connecting strip (12) that is integrally molded to the circumference of the installation plate in one piece, having cutouts (7) provided therein, which are interspersed by the mask body material surrounding the connecting strip (12) such that the strongly stressed installation plate is incorporated into the mask body material in a form-fitting and bonded manner.
A holder for temporarily holding the automatic lung device of breathing apparatus comprises a hollow cylinder (1) made of stiff material, with internal diameter sections which decrease in size step by step and into which there is formed an inner thread (4a, 5a) with a small number of thread turns corresponding to the standardized outer thread of the automatic lung devices. The external diameter of the hollow cylinder is of a size, and designed with a locking edge (3a) extending about the circumference, such that an automatic lung device with a standardized plug connector can also be secured. Thus, when not in use, automatic lung devices with different standardized connectors are held quickly, safely and releasably.
A spectral measuring system for determining substance properties using terahertz radiation, comprising one or more radiation sources (10; 410), of which at least one radiation source (10) can be adjusted or configured regarding the wavelength thereof, the first radiation source (10; 410) emitting a first radiation (S1; S401) having a predefined first wavelength, characterized by a sensor (90), which responds to further radiation (S9; S409), which is based on the radiation (S1; S401) of the at least one radiation source (10; 410), and further by a controller (40; 440), which is connected to the at least one radiation source (10; 410) and to the sensor (90; 490), wherein the controller (40; 440) is configured to control the at least one radiation source (10; 410), adjust the wavelength of the at least one adjustable radiation source (10; 410), and read the sensor (90; 490).
G01N 21/35 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
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