Patent application number | Description | Published |
20080202211 | Gas Sensor and Method For Operating a Getter Pump - The invention relates to a gas sensor comprising a pump chamber ( | 08-28-2008 |
20080276692 | Leak Indicator Comprising a Sniffer Probe - The leak detector comprises a basic device ( | 11-13-2008 |
20100294026 | SNIFFING LEAK DETECTOR - A sniffing leak detector which comprises a first suction line in a sniffing probe, the line leading to a main device, is provided with a larger second suction line through which gas is sucked in from the sniffing tip by a gas delivery pump. By connecting the second suction line, the distance sensitivity is increased. By disconnecting the second suction line, on the other hand, the sensitivity is increased. Thus, it is possible to first search for leaks by use of a high gas throughput and subsequently exactly determine the leaks under the quantitative aspect by use of a reduced flow. | 11-25-2010 |
20100313634 | METHOD AND DEVICE FOR TIGHTNESS TESTING - A test subject, which is filled with test gas, is placed in a testing chamber, which can be evacuated. A carrier gas is conducted into the testing chamber, so that a gas mixture made of carrier gas and test gas forms therein. The gas mixture is suctioned out of the testing chamber by a compressor pump. A testing gas sensor is connected to the outlet of the compressor pump. The test gas is contained in the compressed gas mixture at a partial pressure which is increased by the compression ratio. In this manner, the sensitivity of the test gas recognition is increased and/or the time constant of the measurement is shortened. | 12-16-2010 |
20110018545 | HELIUM SENSOR - The helium sensor comprises a housing that encloses a detection chamber. A side of the housing is closed by a permeable wall that is selective for helium. In the detection chamber, there is located an ion getter pump comprising an anode, a cathode and a magnetic field. The cathode, or a cathode leg is made of beryllium. Beryllium has a low atomic mass, whereby the likewise light-weight helium ions can be better incorporated into the cathode material. | 01-27-2011 |
20110100097 | Leakage Seeker - A leak detector having a pre-vacuum feed pump, a gas detector and a flow sensor. The detector also includes a buffer volume and a restrictor to be arranged between the feed pump and the flow sensor. This protects the flow sensor against pressure surges generated by the feed pump. | 05-05-2011 |
20120090380 | HYDROGEN SENSOR - A hydrogen sensor includes a housing, which is closed off by a membrane that is made of palladium and selectively only pervious to hydrogen. The housing is evacuated and contains a Pirani pressure sensor. The membrane and the Pirani pressure sensor are each attached to a carrier. Both carriers are joined directly next to one another or kept at a distance by a connection piece. The hydrogen sensor has a high sensitivity and a low response time due to the relatively large membrane surface and the low housing volume. It can be produced in a small size and integrated in the handle of a sniffer-type leak indicator. | 04-19-2012 |
20120118048 | SNIFFING LEAK DETECTOR - The invention relates to a sniffing leak detector comprising a sniffing line ( | 05-17-2012 |
20130213114 | Leak Detector - The invention relates to a leak detector comprising a first sensor for detecting a gas component (helium) in a gas taken in. Because the sensor is susceptible to saturation or contamination, a second sensor is provided. The sensor is a thermal conductivity sensor. The thermal conductivity sensor has a lower detection sensitivity, yet, at a high concentration of the gas component, it does not risk being contaminated. The two sensors together allow for a large detection range, from extremely sensitive measurements to instances with high concentrations of the gas components as those which can occur with gross leaks. | 08-22-2013 |
20140311222 | QUICK LEAK DETECTION ON DIMENSIONALLY STABLE/SLACK PACKAGING WITHOUT THE ADDITION OF TEST GAS - The invention relates to a device for leak detection on a test specimen, having an evacuable test chamber for the test specimen. The test chamber is provided with at least one wall area made of a flexible, in particular elastic material. For more precise leakage detection, the progression of the total pressure increase inside the test chamber is measured. | 10-23-2014 |
20140326051 | METHOD FOR DETECTING A LEAK ON A NON-RIGID TEST SPECIMEN - The invention relates to a simplified method for detecting leaks on a non-rigid test specimen, comprising the steps of: introducing the test specimen into a film chamber, lowering the pressure in the film chamber outside of said test specimen, and detecting a leak in the test specimen on the basis of a spatial change in the film of said film chamber. | 11-06-2014 |
Patent application number | Description | Published |
20090173141 | Gas Sensor - The gas sensor has a selectively permeable membrane which is composed of silicon material and is provided with a heating device on the outside. The membrane closes an evacuated housing which contains a pressure sensor. When evacuating the area surrounding the housing, the heat dissipation is changed as a result of the quick change in the total pressure of the surrounding air, with the result that signal drift arises despite temperature regulation of the membrane. The disclosure provides at least one second heating device whose temperature is regulated independently of the first heating device. As a result, the membrane temperature is highly constant even in the case of severely changing total pressure in the housing. | 07-09-2009 |
20090188302 | Leak Detector - A leak detector comprising a base appliance provided with a gas detector, a vacuum pump, and a control device. A sniffer probe is connected to the base appliance. A test leak device containing the supply of test gas is arranged in a separate sub-housing. The sub-housing also contains a temperature sensor, a processor, and a data memory. The processor corrects the measured temperature according to a sample, and modulates the light of a light barrier. The processor is connected to the control device in the base appliance by a data cable. | 07-30-2009 |
20090277250 | SNIFFER LEAK DETECTOR - A sniffing leak detector which comprises a mass spectrometer, a turbomolecular pump and a forevacuum pump. In case that the sniffing hose with the hand-operated sniffing probe becomes detached from the main device, atmospheric pressure would pass into the gas inlet conduit and disrupt the high vacuum in the mass spectrometer. In order to protect the mass spectrometer and the vacuum pump apparatus, a flow restrictor with an upstream filter is arranged in the gas inlet conduit. | 11-12-2009 |
20100005861 | SNIFFING LEAK DETECTOR - To achieve a large measurement range from small up to larger leakage rates, a switchover from normal operation to gross operation occurs. In gross operation, the sucked-in gas flow is separated by different throttles, wherein the throttle that leads to the test gas sensor has a low flow rate. This manner of operation prevents a too large quantity of test gas from reaching the sensor surface and contaminating the sensor. In another alternative, in gross operation the test gas flows only across a part of the sensor surface. The other part is flushed. | 01-14-2010 |
20140096595 | METHOD AND DEVICE FOR TIGHTNESS TESTING - A method for tightness testing, wherein an evacuated test object is exposed to the external influence of a test gas and wherein a gas mixture made of a test gas withdrawn from the test object and of a carrier gas, is examined for the presence of test gas by use of a test gas sensor which, when viewed in the flow direction of the gas mixture, is arranged downstream of a condensing pump for analyzing the compressed gas mixture, wherein the test object is exposed to the ambient atmosphere without being surrounded by a test chamber, and that a test gas gun is provided for generating the atmosphere containing the test gas. | 04-10-2014 |
Patent application number | Description | Published |
20090100909 | Leak testing method and leak testing device - A leak testing device includes a chamber which is hermetically sealed towards the environment, having a test object filled with a test gas that is positioned in the chamber. In the chamber, a partial-pressure sensor is arranged that selectively responds to the test gas, but not to the filler gas. Thus, a leak test can be simply performed without high vacuum and without mass spectrometers. | 04-23-2009 |
20110247400 | LEAK DETECTOR WITH OPTICAL TRACER GAS DETECTION - A leak detector comprises a cell provided with a tracer gas inlet preferably permeable to a tracer gas. In the cell, the tracer gas is caused to assume an energetically higher metastable state. By means of laser spectroscopy the absorption spectrum of the metastable tracer gas is sampled in an optical measuring section, whereby the presence of tracer gas is detected. | 10-13-2011 |
20110247498 | GAS-SELECTIVE MEMBRANE AND METHOD OF ITS PRODUCTION - A membrane selectively permeable to light gases comprises a membrane body formed by a first plate and a second plate. The second plate comprises a thin layer that is selectively gas-permeable. In the region of windows, this layer is exposed. There, support is provided by a porous bottom wall in the first plate or by narrow bores in the second plate. A heating device causes a radiation heating of the windows. | 10-13-2011 |
20120304863 | GAS-SELECTIVE MEMBRANE AND METHOD OF ITS PRODUCTION - A membrane selectively permeable to light gases comprises a membrane body formed by a first plate and a second plate. The second plate comprises a thin layer that is selectively gas-permeable. In the region of windows, this layer is exposed. There, support is provided by a porous bottom wall in the first plate or by narrow bores in the second plate. A heating device causes a radiation heating of the windows. | 12-06-2012 |