A leak detection system for a refrigerant circuit is provided. The refrigerant circuit is sealed and circulates a working fluid having a refrigerant (e.g., flammable refrigerant) and an oil. A reducing tag component is solubilized within the refrigerant. The leak detection system also includes a sensor for detecting the tag component if the refrigerant should leak from the refrigerant circuit. The sensor is highly sensitive to the tag component and thus enhanced detection is enabled. The tag component is stable in the working fluid and does not affect the flammability rating or performance of the refrigerant or oil. The tag component is present at a concentration of from about 50 ppm to about 35,000 ppm in the refrigerant. Methods of detecting leaks from refrigeration systems are also provided.

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.

A method for leak detection of a packaged sealed product according to the steps: feeding liquid nitrogen to a vaporizer thereby forming gaseous nitrogen; mixing the gaseous nitrogen with multifunctional particles; feeding the mixture of gaseous nitrogen and multifunctional particles to a chamber wherein a packaged sealed product is present in the chamber; and transmitting a signal when the multifunctional particles contact a component leaking from the packaged sealed product. Typically, the packaged sealed product is a pharmaceutical or other medicinal product.

Disclosed is a battery device including a battery; a plurality of sensors attached to the battery; and a transceiving circuit configured to transmit a signal received from a monitoring device to the plurality of sensors and to transmit signals received from the plurality of sensors to the monitoring device. The plurality of sensors generate surface acoustic waves (SAWs) in response to the signal received from the monitoring device, when receiving the signal from the monitoring device through the transceiving circuit, and the plurality of sensors include at least one first sensor configured to output a first signal corresponding to a SAW varied depending on a temperature of the battery; at least one second sensor configured to output a second signal corresponding to a SAW varied depending on pressure of the battery; and at least one third sensor configured to output a third signal corresponding to a SAW varied depending on an electrolyte leakage state of the battery.

A method is provided for examining the leaktightness of a closed housing of an electrical component. This method includes flooding the housing with a gas mixture that contains a high proportion of an inert gas and a low residual proportion of a gas that can be detected by a measuring probe. During the flooding process, gas that is located inside the housing is forced out of the housing. The method proceeds by determining any leak in the housing by detecting gas escaping from the housing, installing the electrical component when the housing is proven to be leaktight, with the inert gas remaining in the housing.

A leak detecting device for water filled vessel such as a swimming pool. An annular resilient seal having a central opening contacts the surface of the vessel under water and creates a seal between the resilient seal and the vessel. A rigid housing open in its interior is coupled to the resilient seal and has an opening for an inlet to deliver fluid into the interior of the housing, or couple a flow meter thereto to measure the fluid flow, or deliver a dye into the housing and through the central opening of the resilient seal.

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 system for detecting leaks from containers is provided. The system comprises conveying means including at least one inlet conveyor belt and being configured to transport containers, already filled with a given food and sealed, to an inspection zone. The system further comprises an inspection apparatus, configured to test the tightness of containers arrived at the inspection zone. The inspection apparatus comprises extraction means and suction means, configured to induce the release of volatile substances from each container arrived at the inspection zone and suck in gas surrounding each of the containers and any volatile substances leaked from the containers. The inspection apparatus also including detection means configured to analyze the sucked-in gas and detect the presence of any volatile substances leaked from the containers.

A leak detection device for combined integral and localizing leak detection, comprising a test specimen port (14), a test specimen high vacuum pump (16), the inlet of which is connected with the test specimen port (14), at least one pre-vacuum pump (20), the inlet of which is connected via a test specimen line (18) with the outlet (19) of the test specimen high vacuum pump (16), and a gas detector (32) connected with the pre-vacuum pump (20), which is connected via at least a first gas line (28) with the test specimen high vacuum pump (16), the test specimen line (18) and/or the specimen port (14) such that gas from the test specimen port (14) is supplied to the gas detector (32) via the gas line (28) for gas analysis, characterized in that a gas pressure measuring volume (22) connected with a gas pressure sensor is configured in the test specimen line (18) such that, during the gas measurement with the gas detector (32), an integral leak detection can be carried out by measuring the pressure profile in the gas pressure measuring volume (22).

The present invention is directed to a microcapillary holder (1) for holding a microcapillary (5) during positive control physical container closure integrity (pCCI) testing of a packaging (10). The microcapillary holder (1) comprises a body (2) with an elongated portion (2a) having a longitudinal axis (X). The body (2) has a lateral circumference, a duct (3) and a pass-through channel (4). The duct (3) of the body (2) extends along the longitudinal axis (X) through the elongated portion (2a). The duct (3) of the body (2) is dimensioned to receive the microcapillary (5). The pass-through channel (4) of the body (2) extends between the lateral circumference and the duct (3). The present invention is further directed to a respective pCCI testing system (30) and to a process of positive control of a pCCI of a packaging (10).