Methods and systems for detecting membrane blockage in a gas detector are disclosed. In some embodiments, the gas detector comprises a membrane defining a sensing chamber of the detector, the sensing chamber comprising a relaxed state pressure. The method comprises applying one or more forces on one or more walls of the membrane, wherein applying the force causes a volume change inside the sensing chamber. The method further comprises measuring a pressure change inside the sensing chamber, the pressure change being caused by the volume change. The method further comprises determining a rate of return to the relaxed state inside the chamber and determining a condition of the membrane based on the determined rate of return to the relaxed state.

The present invention relates to an analysis apparatus for compressed gases in a compressed-gas tank, such as a breathing-air cylinder or the like, for determining gas components, in particular CO, CO.sub.2, O.sub.2, VOC, SO.sub.2, NO, NO.sub.2, helium and moisture, having a removal device which can be connected to the compressed-gas tank, characterised in that the removal device comprises a connection element which is under the pressure of the compressed gas to be analysed in the compressed-gas tank and can be coupled to a gas treatment device having a gas measuring and evaluating device for determining the desired gas components, the connection element is also pressurised when not connected to the compressed-gas tank, preferably by means of a shut-off valve, and the gas treatment device and the gas measuring and evaluating device are further also configured to monitor and analyse the compressed gases dispensed by a compressor to fill a compressed-gas tank.

The gas measurement device includes a filter having a plurality of openings, each opening being variable in size, an adjustment mechanism configured to vary size of the plurality of openings, a first gas sensor configured to detect gas molecules passing through an opening of the filter and output a first measurement value corresponding to the detected gas molecules, and a second gas sensor configured to detect the gas molecules passing through the opening of the filter, output a second measurement value corresponding to the detected gas molecules, and detect gas molecules of a gas species different from the gas molecules detected by the second gas sensor.

A miniature gas detection system includes a separation flow channel fabricated by semiconductor processes and a filling material disposed in the main flow channel of the separation flow channel to perform adsorption and separation on compositions of compounds contained in the gas introduced into the main flow channel. Each detection flow channel is formed with a monitoring chamber, and a micro-electromechanical systems pump is formed on the bottom portion of the monitoring chamber. In each monitoring chamber, a light emitted from the light emitting element is reflected by the two mirrors and received by the light detection element. Therefore, the light detection elements obtain and output spectra of the compositions of compounds contained in the gas according to the differences in optical adsorptions of the compositions of compounds for lights with different wavelengths, so as to analyze and determine the type of the gas contained in the compositions of compounds.

Intrinsically safe and explosion proof enclosure platforms for convertible gas detectors are disclosed. In some embodiments, a convertible gas detector comprises a gas sensor, the gas sensor comprising sensor circuit. The gas detector further comprises an enclosure, the enclosure configured to house the sensor circuit. The gas sensor further comprises an end cap, the end cap configured to be detachably connected to the enclosure along a flamepath joint. The gas detector is configured to switch between operating as an explosion proof detector and an intrinsically safe detector responsive to whether the end cap is connected to the enclosure.

This gas imaging device makes it possible to photograph gas without placing a burden on a user while enhancing the evidential reliability of imaging results. This gas imaging device comprises: an infrared imaging section for imaging, under a predetermined first photography condition, infrared radiation from a given area from which gas could leak; an image processing section for generating an image of the given area on the basis of output results from the infrared imaging section; and a control section for, on the basis of vicinity information for the given area and the output results of the infrared imaging section, calculating a reliability indicating whether the first photography condition is suitable for photography of the gas and storing an image of the given area in a storage section in association with at least one from among the reliability and the vicinity information.

Various example embodiments described herein relate to an electrochemical gas sensor. The electrochemical gas sensor can include a sensor cap having one or more solid features disposed on a surface of the sensor cap. The electrochemical gas sensor can include a counter electrode configured to generate a gas during use of the electrochemical gas sensor. The electrochemical gas sensor can include a vent assembly adapted to release at least a portion of the gas generated at the counter electrode out from the electrochemical gas sensor. The vent assembly can include a vent conduit and a vent membrane that defines a passage for the gas to flow from an extended portion of the counter electrode, to the vent conduit, via the vent membrane, so as to be vented from the electrochemical gas sensor.

A monitoring device for monitoring an environment including a detector component configured to detect at least one analyte signature data and environment information related to an environment, a location device configured to record a detection location of the detector component at a time of detection of the at least one analyte signature data and the environment information, a first memory device configured to receive and record data comprising operating status of the detector component and, at the time of detection, the detected at least one analyte signature data and the environment information, at least one communication device configured to wirelessly transmit the recorded data to an associated receiver, wherein the associated receiver is configured to receive and process the recorded data and wherein the detector component and the communication circuitry are a printed component and wherein the at least one detector component includes at least one nano sensor.

A gas detector is provided and includes a gas detector element, electronics to interface with the gas detector element and an enclosure configured to expose the gas detector element to an exterior and to form an electronics housing area in which the electronics are disposed whereby the electronics are isolated from the exterior.

A management system includes a processor system in operative connection with a communication system. The communication system is configured to be in communicative connection with a gas monitoring system of an entity. The gas monitoring system further includes one or more portable gas detection instruments which include one or more gas sensors and a rechargeable battery system. The gas monitoring system further includes one or more chargers configured to charge the rechargeable battery system of each of the portable gas detection instruments. The management system further includes a memory system in operative connection with the processor system. The memory system includes an algorithm executable by the processor system stored therein and a database associated with the algorithm stored therein, which includes data identifying each of the chargers as an asset of the entity and each of the portable gas detection instruments as an asset of the entity.