An imaging system and method for leakage detection uses schlieren imaging to locate and characterize a flow of pressurized gas with a refractive index different than ambient air. In particular, a schlieren imaging system includes a collimated light, a knife-edge spatial filter and a 4F telescopic imaging system is used to create an image of a device under test (DUT). The DUT is pressurized and monitored for leaks. When a leak is present and in the monitored plane of the DUT, contrast variation illustrates the presence, location and character of the leak. For example, a waterproof/leakproof mobile device may be evaluated for leakage between layers of modules, such as leaks in the housing of a waterproof electronics case. This detection can allow identification and characterization of the leak point via visual identification.

The invention relates to a gas leakage search device including a test gas spray device for spraying a test object with a test gas, a vacuum assembly for evacuating the test object, wherein the vacuum assembly has a vacuum pump and a gas detector downstream of the test object for measuring the test gas proportion, and an analysis unit which evaluates the measurement signal of the gas detector. The invention is characterized in that a data communication connection is established between the spray device and the analysis unit; the spray device is designed to detect at least one point in time of the spraying process and to transmit same to the analysis unit, and the analysis unit is designed to output the corresponding measured test gas proportion at the transmitted point in time of the spraying process.

Systems and methods of the invention relate to methods and systems that collect data regarding a keg or container via a sensor, wherein such data collected is used to glean information regarding the container, the contents of the container, a location of the container, or an environment in which the container resides. The sensor can be affixed to a container which communicates wirelessly with a gateway device and the gateway device communicates such collected data to a track component. The track component can be configured to receive data from the sensor(s) and gateway device(s) and identify conditions to improve the quality of the contents of the container, track a location of the container, and among others.

Tracer gas sensing device comprising a gas discharge cell having cell walls defining a discharge volume and a tracer gas inlet into the discharge volume, an optical spectrometer arrangement having a radiation source on a first side of the discharge cell for emitting radiation into the discharge cell and a radiation detector on a second side of the discharge cell opposite to the first side for detecting radiation which was emitted by the radiation source through the discharge volume, and electrodes on opposing sides of the discharge cell for generating a plasma within the discharge cell, said electrodes being unexposed plasma electrodes. The discharge cell may be a dielectric barrier discharge cell and the electrodes may be powered by an AC power source.

The respirator fit monitor described herein can be worn continuously by users so as to provide an indication as to how well their masks are fitting during use, thereby providing quantitative, wearable fit testers available for continuous use in real-life situations. The monitor includes a low-cost optical particle sensor assembly and controller unit for performing mask fit tests by comparing particle concentrations inside and outside of the mask. The fit test monitor is low cost and wearable, capable of dual sampling, capable of fit factor ratios well above 100, is battery powered and provides near real time measurements with a means for indicating the fit of the mask. The system includes wired or wireless communications for data logging, analysis and display capabilities.

A leak detecting device for a fluid filled vessel including a housing, a clamp, a resilient member, and an opening. The housing has a continuous perimeter edge sized to extend around an underwater surface, the housing forming a hollow interior. The clamp secures to the housing. The resilient member secures to the perimeter edge of the housing and is adapted to contact and form a seal between the housing and the underwater surface. The opening is formed through an entirety of a wall of the housing, wherein the opening is accessible from an exterior of the housing.

A method for detecting fluctuations in the amount of test gas detected by a sniffer probe of a leak detector in the gas flow from around a test piece pressurized with an oxygen-free test gas containing at least an amount of CO.sub.2, wherein an amount of oxygen in the ambient air is measured.

A conduit (100) for transporting a fluid comprises a first collar (102), a second collar (103), and a bellows (108). The bellows (108) comprises a corrugated inboard ply (110), a corrugated outboard ply (112), and an interstitial space (126), interposed between the corrugated inboard ply (110) and the corrugated outboard ply (112). The conduit additionally comprises a first weld (138), hermetically coupling the corrugated inboard ply (110) and a first outer collar portion (104), a second weld (134), hermetically coupling the corrugated outboard ply (112) and a first inner collar portion (106), a third weld (186), hermetically coupling the corrugated inboard ply (110) and a second outer collar portion (105), a fourth weld (184), hermetically coupling the corrugated outboard ply (112) and a second inner collar portion (107), and a first sensor (116), communicatively coupled with the interstitial space (126).

A leak detecting device for a fluid filled vessel including a housing having a continuous perimeter edge sized to extend around an underwater surface, the housing forming a hollow interior, an anchoring attachment extending through an aperture in the housing for immovably anchoring the housing to the underwater surface, a resilient member secured to the perimeter edge of the housing and adapted to contact and form a seal between the housing and the underwater surface, and an inlet forming an opening through an entirety of a wall of the housing accessible from an exterior of the housing.

A leak detecting device for a fluid filled vessel including a housing, tube, anchoring attachment, resilient member, and opening. The housing has a continuous perimeter edge sized to extend around an underwater surface, the housing forming a hollow interior. The tube extends through an aperture into the hollow interior of the housing, having a first end on an interior side of the housing and a second end on an exterior side of the housing. The anchoring attachment is secured to the first end of the tube. The resilient member is secured to the perimeter edge of the housing and adapted to contact and form a seal between the housing and the underwater surface. The opening is formed through an entirety of a wall of the housing, wherein the opening is accessible from an exterior of the housing.