Inficon Gmbh

Inficon Ab

Inficon Holding Ag

Sensistor Technologies Ab

Adixen Sensistor Ab

Fredrik Enquist

Henrik Vennerberg

Johan Hellgren

Peter Hebo

Claes Nylander

Per Jenneus

Niclas Edvardsson

Johann Hellgren

Method for adapting the concentration of a sample gas in a gas mixture to be analysed by a gas chromatograph assembly (), the gas chromatograph assembly () comprising a sample gas inlet () for introducing a sample gas to be analysed, a secondary gas inlet (), a gas chromatograph infrared sensor (), a gas chromatograph column (), and a gas chromatograph bypass () parallel to the column (), characterized by

Method for adapting the concentration of a sample gas in a gas mixture to be analysed by a gas chromatograph assembly, and chromatograph assembly therefore

A vacuum bell probe for detecting leaks in underground gas pipes may include a flexible suction cup having a bottom side forming a suction opening. The suction cup may define an interior volume. The bottom side may include a soft seal ring having a higher elasticity than the suction cup, surrounding the suction opening and forming a contact surface adapted to create a seal in contact with a ground surface under which a gas leak may be assumed such that a vacuum may be generated within the interior volume upon contact to the ground surface.

Vacuum bell probe and method for leak detection

Method for wide range gas detection using a gas detection system comprising a sample gas inlet, a reference gas inlet, a gas modulation valve and a gas analyzer, wherein the gas modulation valve alternatingly connects the sample gas inlet to the gas analyzer during a sample gas time period and the reference gas inlet to the gas analyzer during a reference gas time period, characterized in that the sample gas time period is shorter than the reference gas time period such that the sample gas concentration in the gas analyzer is reduced.

Wide range gas detection using an infrared gas detector

Described is a method for quantifying the amount of optically interfering gas impurities in a gas detection system comprising a sample gas inlet, a reference gas inlet, a gas modulation valve, and an infrared absorption gas detector used for analysis of methane or natural gas, wherein the gas modulation valve alternatingly connects the sample gas inlet to the gas detector during a sample gas time period and the reference gas inlet to the gas detector during a reference gas time period. The method includes measuring an infrared absorption for at least two different sample gas concentrations in the gas detector achieved via respective different ratios from the sample gas time period and the reference gas time period, and comparing amplitudes of different measurement signals of the at least two different sample gas concentrations with calibration functions to assess an actual gas impurity concentration in the sampled gas.

Method for quantifying the amount of optically interfering gas impurities

A gas detection system, comprising a sample gas inlet, a reference gas inlet and a gas modulation valve alternatingly connecting one of the sample gas inlet and the reference gas inlet to a gas sensor, is characterized in that a selective transfer filter is located in the gas flow path connecting the gas modulation valve and the gas sensor.

Gas detection using gas modulation

Method for determining whether a gas sample originates from biological processes or from a gas installation being tested and containing a utility gas is characterized in that an increased concentration of hydrogen in the sample as compared to that present in the utility gas is used as evidence that the sample originates from biological decay processes and not from the gas installation under test.

Method and device for discrimination between natural gas and swamp gas

Infrared gas detection system comprising a gas inlet, an infrared gas analyzer connected to the gas inlet and a secondary gas sensor connected to the gas inlet, and an evaluation device evaluating the measurement signals from both the infrared gas analyzer and from the secondary gas sensor, such that a gas is identified only if both the infrared measurement signal and the secondary measurement signal coincide in time.

Infrared gas detector with secondary sensor

The present invention relates to gas sensor housing (), comprising: a gas sensor () held by a housing body () below a primary gas permeable membrane (); at least one connector element () molded into the housing body () such that the respective ends thereof enable connectivity to the gas sensor () such that signals may be carried from the gas sensor () to the connector element (); a sensor envelope () providing an enclosure for the housing body (); means for retaining the primary gas permeable membrane () in place above the gas sensor (); a spacer section () providing a separation distance (X) between the gas sensor () and the primary gas permeable membrane ().

Gas sensor housing

A system for detection of a leak at a leakage testing point of a test object by a tracer gas. A positionable tracer gas mediating unit has a tip. A marker is attachable at the leakage testing point. A marker detector is associated with the positionable tracer gas mediating unit. The tip of the tracer gas mediating unit is arranged to be positioned within a predetermined distance interval from the marker during a leak detection test. The marker detector is arranged to detect the marker when the tip is positioned within the predetermined distance interval so as to certify a correct positioning of the tip.

Leak detection system comprising a tracer gas mediating unit

A gas probe for sampling gas molecules from a fluid. A housing includes an orifice and is adapted to be arranged in gas communication with a test gas sensor. The probe includes a stack of layers, whereby gas sample molecules have to pass through all layers of the stack in order reach the sensor. The stack includes at least a first membrane layer, a first spacer layer, a first filter layer and a second spacer layer. The housing includes an inlet for introducing blocking gas molecules into the second spacer layer and an outlet for discharging blocking gas molecules out of the first spacer layer. The gas probe is connectable to a control unit for controlling the blocking gas flow into the second spacer layer.

Gas probe for sampling gas molecules from a fluid and a system comprising the gas probe

A hydrogen gas sensitive semiconductor sensor including a catalytic metal layer, a semiconductor layer and an insulator layer arranged between the catalytic metal layer and the semiconductor layer. The catalytic metal layer includes an outer surface and an inner surface including at least one hydrogen atom adsorption surface portion. Each hydrogen atom adsorption surface portion is arranged adjacent to the insulator layer. The surface area of the outer surface is at least 100% larger than the total surface area of all of the at least one hydrogen atom adsorption surface portion. A probe includes the sensor, A hydrogen gas detection system includes the sensor. Use of the sensor for detection of presence of and/or measurement of concentration of hydrogen gas in a gas sample.

Hydrogen gas sensitive semiconductor sensor

A system and a method for determining the leakproofness of an object having a first cavity. The system includes a closed chamber having a second cavity arranged to envelope the object, an evacuator for lowering the pressure inside one of the cavities, a supply for supplying a tracer gas into the one of the cavities rendered the higher pressure, a detector sensitive to the tracer gas and an introducer for introducing a transport gas into the one of the cavities rendered the lower pressure. Furthermore, the evacuator is arranged to compress arriving gas to the ambient pressure of the chamber and to communicate with the detector, which is suited for operation at the ambient pressure of the chamber. The tracer gas includes hydrogen.

System and method for determining the leakproofness of an object

The present invention relates to a method at detection of presence of hydrogen gas and measurement of content of hydrogen gas. The detection is performed by means of a hydrogen gas sensitive semiconductor sensor, whose output signal is used for determination of the content of hydrogen gas in the gas sample. The semiconductor sensor is exposed to the gas sample during a detection interval, which is preceded by a time-interval of preconditioning treatment during which the semiconductor sensor is exposed to a surrounding gas atmosphere. The invention is characterized in that the gas atmosphere contains a negligible amount of oxygen, hydrogen and carbon monoxide compared to the gas sample and that the time interval is many times longer than the detection interval.

Growing community of inventors

Linkoping, Sweden

Fredrik Enquist