Abstract: A leakage inspection device includes an inspection chamber in which an inspection object is disposed to be filled with a tracer gas, and a circulation passage which connects a suction port disposed in the inspection chamber and a blowout port disposed at a position away from the suction port in the inspection chamber with each other. The leakage inspection device includes a blower disposed in the circulation passage to circulate gas by sucking from the inspection chamber through the suction port and by blowing out from the blowout port. The leakage inspection device includes a detector configured to detect the tracer gas leaked from the inspection object and contained in the gas flowing through the circulation passage at a position separated by a predetermined distance or more from the blower toward the blowout port in the circulation passage.

Abstract: A method and apparatus for filter testing for use within an air handling system. The air handling system may include one or more scan assemblies. The scan assembly may include a track system using one or more magnetic arrays.

Abstract: A method for evaluating an air purification system. The method includes generating, with an air flow generator, a flow of air through a test filter so that an upstream air flow exists an upstream side of the test filter and a downstream air flow exists on a downstream side of the test filter. A multiple contaminant mixture is injected, with a fluid injector, into the upstream air flow. Downstream concentrations for each contaminant of the multiple contaminant mixture in the downstream air flow are measured with a contaminant measurement device. Test filter breakthrough curves for each contaminant of the multiple contaminant mixture in the downstream air flow are generated based on the downstream concentrations for each contaminant of the multiple contaminant mixture.

Abstract: A system and method for determining a residual life of a swivel. The method includes determining at least one of an angular rotation, a linear displacement and a rotational direction of at least one swivel and determining rotational count of the at least one swivel based on the determined at least one of the angular rotation, the linear displacement and the rotational direction of the at least one swivel. Further, the method includes indicating a residual life information of the at least one swivel based on the determined rotational count of the at least one swivel. Further, the embodiments herein also provide an electronic device for determining residual life of a swivel.

Abstract: An ultrasonic detector suitable for mounting in a position for surveying an area for a source of airborne ultrasound, which detector comprises a sensor for detecting an ultrasonic sound signal, characterised by a transducer configured to produce a broadband ultrasonic sound signal for reception by said sensor enabling said ultrasonic detector to perform a self-test.

Abstract: A gas sensor may include a plurality of elements that are responsive to particular gases based at least in part on the temperature of the temperature sensitive element. A first of the elements may be a gas detection element heated to a temperature at which it is responsive to a gas of interest. A plurality of additional elements may be configured in a reference element network and heated to a temperature at which they are not responsive to the gas of interest but are instead responsive to other effects such as humidity. The reference element network output may be used to remove the other effects (e.g., humidity) from the gas detection element output.

Abstract: Provided are a pressure-resistance inspection apparatus for valves and its inspection method, and hydrogen gas detection unit capable of detecting external leakage and specifying its position of occurrence even for valves with different sizes and shapes by performing pressure-resistance inspection with a simple structure quickly with high accuracy while preventing errors in test results, without requiring post-treatment for the valves, and also capable of mass processing by automation. Provided are a cover 2 in which a test valve 1 is accommodated in a state of being isolated from outside and a sensor 22 inside this cover 2 and capable of moving to a position close to an outer surface of the test valve 1 filled with a search gas. This sensor 22 is a gas sensor capable of detecting external leakage of the search gas from the test valve 1.

Abstract: An electronic device includes a housing configured to form at least a portion of an outer surface of the electronic device; a battery disposed inside the housing; a circuit board disposed inside the housing; a gas sensor module including at least one gas sensor and mounted in the circuit board; and at least one wall disposed adjacent to the gas sensor module, wherein in the at least one wall, a first opening configured to introduce a gas leaked from the battery and a second opening configured to introduce air outside the electronic device are formed.

Abstract: Apparatus and methods for determining the liquid level of a canister are described. A magnetic field generated by a floating magnet within the canister is measured by a plurality of magnetic sensors outside of the canister. Methods of calibrating the magnetic sensors and measuring the location of the floating magnet are also described.

Abstract: An apparatus includes an enclosure designed to house electronics and a ventilation plug fastened to an exterior of the enclosure, the ventilation plug being adapted for field testing hermeticity.

Abstract: A filling level indicator for determining a filling level in a tank, having a resistor network, a contact element, and a magnetic element. The contact element is arranged spaced apart from the resistor network, and the magnetic element can be moved relative to the resistor network and the contact element. An electrically conductive connection can be established between the contact element and the resistor network by deflecting the contact element. A plastic spacer element is arranged between the resistor network and the contact element and is hot-swaged to the resistor network and/or to the contact element.

Abstract: The invention relates to a system for testing a perfume, comprising a housing, a test member able to be at least partially inserted into the housing so as to be impregnated with the perfume, a dispensing device for dispensing the perfume on the test member, a sensor for detecting the presence of the test member, an actuator for actuating the dispensing device, and a processing unit which controls the actuator in order to trigger the dispensing during extraction of the test member.

Abstract: A sample pre-compression valve for liquid chromatography applications is described. The valve enables a sample pre-compression while the solvent pump continues to conduct solvent to the chromatography column. Furthermore, the sample pre-compression valve includes an INJECT position, a LOAD position and a PUMP PURGE position, in which all connecting grooves of the valve are flushed with liquid. A use of the sample pre-compression valve is described as part of a sampler for liquid chromatography applications.

Abstract: A capacitor fuel probe comprises a plurality of capacitor segments which are superposed on one another along a probe axis. The capacitor segments are distributed into three sets and connected electrically in parallel within each set separately. A capacity measurement which is performed for all the sets allows determining a fuel level while taking into account a possible variation of a dielectric constant of the fuel parallel to the probe axis. Top height values hn of the capacitor segments are selected so that hn?1<hn·(Kmin?1)/(Kmax?1), for any integer n-value from 2 to N, N being the number of capacitor segments, n varying according a superposition order of the capacitor segments, and Kmin and Kmax being minimum and maximum values for a fuel dielectric constant which are prescribed for the capacitor fuel probe.

Abstract: The disclosure provides a method for sampling groundwater. The method includes extracting groundwater from a monitoring well in a first flow rate; monitoring groundwater level in real-time, and calculating a decrease of the groundwater level during the extracting in the first flow rate based on the real-time monitored groundwater level; when the decrease of the groundwater level is equal to a first value, extracting groundwater from the monitoring well in a second flow rate, the second flow rate being smaller than the first flow rate; and when the groundwater level is in an equilibration state, extracting groundwater from the monitoring well and using the extracted groundwater at this time as a representative groundwater.

Abstract: A method of calibration of gas sensors, including breath gas sensors which are portable and for home, consumer, or medical use, wherein the calibration against samples of a measured gas having a concentration above the null value is only performed once to establish a set of calibration ratios of measured known gas concentration readings over null sample readings. Thereafter, in use, the ratio of unknown gas concentration in a test sample to a null value (preferably ambient air) is determined without recalibration, and that ratio is compared with the set of calibration ratios to determine the unknown gas concentration by interpolation or extrapolation.

Abstract: The invention relates to a film chamber 10 which has a film chamber wall for testing the sealing tightness of a gas-filled test specimen 38, which film chamber wall defines a chamber volume 32 for holding the test specimen 38 and has a first vacuum connection 28 for evacuating the chamber volume 32 by means of a first vacuum pump 30 connected to the first vacuum connection 28, wherein at least a portion of the film chamber wall has a flexible film 12, 14, characterized in that the film 12, 14 has two layers 20, 22 arranged adjacent to each other which surround an evacuable film interspace 26.

Abstract: This disclosure provides a sensor for detecting an analyte. The sensor can include an antenna and sensing material both disposed on a substrate, where the sensing is electrically coupled to the antenna. The sensing material can include a carbon structure including a multi-modal distribution of pore sizes that define a surface area including bonding sites configured to interact with one or more additives and the analyte. The carbon structure is configured to generate a resonant signal indicative of one or more characteristics of the analyte in response to an electromagnetic signal. The carbon structure can include distinctly sized interconnected channels defined by the surface area and configured to be infiltrated by the analyte, and exposed surfaces configured to adsorb the analyte. Each of the interconnected channels can include microporous pathways and/or mesoporous pathways, which can increase a responsiveness of the sensing material proportionate to the analyte within the carbon structure.

Abstract: A method for determining the static friction coefficient of a shoe sole (2) using a test bed (1) comprising a measuring surface (3) with known friction features; a bearing member (4) producing a bearing force Fz on the sole (2); and a traction member (5) capable of generating a movement between the sole (2) and the measuring surface (3); said method comprising the following steps: positioning at least one portion of a sole (2) to be tested on the measuring surface (3); applying a bearing force Fz on the sole (2); gradually causing a movement to be applied to the traction member (5); recording the values of Fx and Fz; and determining the static friction coefficient Mu.

Abstract: There is provided a sealing detection method for a sealing structure, comprising the following steps: S1, attaching a thin film on a gasket to seal an opening; S2, disposing a sealing ring directly below the base to seal a lower opening of the mounting through hole; S3, providing a vent hole on sealing ring through which the sealing ring communicates with a gas source with a gas pressure sensor; S4, starting to supply or pump gas to form a positive pressure or a negative pressure region between the sealing ring and the base; S5, maintaining the air pressure state for a certain time, during which the gas pressure sensor performs real-time detection of gas flow; S6, comparing detected gas flow with qualified threshold range; S7, sorting products with the sealing structure according to detection results; S8, peeling off the thin film and completing the detection.