| 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 |
| 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 |
