Instrumentarium Corporation

General Electric Company

Ge Healthcare Finland Oy

Kurt Weckström

Heikki Haveri

Kai Karlsson

Mika Hietala

Heikki Antti Mikael Haveri

The invention concerns a gas analyzer, which comprises: an electromagnet that has an air gap; a power source for supplying cyclically variable electrical current/voltage to said electromagnet; a sample gas conduit and a reference gas conduit opening into said air gap; an exit conduit communicating with said air gap for removing the intermixed sample and reference gases; pressure detecting microphone or microphones connected to said sample gas conduit and to said reference gas conduit for sensing gas pressures at a first acoustic measuring frequency in the respective conduits giving at least one acoustic pressure signal component; and electronics connected to said microphone(s) to receive said acoustic pressure signal component or components to form at least a first intermediate output signal describing content of a paramagnetic gas component in the sample gas.

Measuring gas components together with a paramagnetic gas

Liquid separator for a gas analyzer and method for separating a liquid component from gas. The liquid separator comprises an input passage having an input end and an output end, an output passage having an input end and an output end, a wall formed of a gas permeable and liquid impermeable material separating the input passage and the output passage, means for introducing a gas sample containing liquid through the input end into the input passage with a first portion of the gas passing through said wall to the output passage and a second portion of the gas and the liquid remaining in the input passage, a vacuum means for flowing the first portion of the gas through the output end from the output passage to a measuring unit, a first conduit connecting the output end of the input passage and for conducting the second portion of the gas and the liquid furtheron with vacuum means. The output passage is arranged to widen towards the output end of the output passage and/or the input passage is arranged to narrow towards the output end of the input passage.

Liquid separator for a gas analyzer and method for separating a liquid component from gas

A non-dispersive infrared measuring arrangement for a multigas analyzer is described having a radiation source (), a measuring chamber (), a beam splitter (), at least a first and a second detector unit () both with at least two detectors (); and optical filters in radiation beam portions ending in said detectors. The detector units receive the reflected beam portions (R) and the transmitted beam portion (R). Both the first and second detector units () have: at least one measuring detectors () provided with an optical measurement filter (); and at least one reference detectors () provided with an optical reference filter (). Alternatively, the first detector unit () has at least two measuring detectors () each provided with an optical measurement filter (), and the second detector unit () has at least two reference detectors () each provided with an optical reference filter (). The first detector in said first detector unit and said second detector in said second detector unit are positioned to constitute a first independent single path analyzer channel (), and said second detector in said first detector unit and said first detector in said second detector unit are positioned to constitute a second independent single path analyzer channel ().

Detection assembly and measuring arrangement for multigas analyzers

The invention concerns a gas analyzer comprising: a measuring volume (), a radiation source () for providing a beam to pass said measuring volume; a heat sink () for said radiation source; at least one thermal detector () having a hot junction within a support structure and receiving the radiation and a cold junction for reference within the same support structure and protected from said radiation; at least one optical bandpass filter () between said hot junction and said radiation source; and a thermal mass (), which is formed of a material having high thermal conductance. The thermal mass has a cavity with a bottom step () and a rim (), and a first length therebetween. The support structure has a frontal edge () and a base plate lip (), and a second length therebetween. There is a radial gap between the thermal mass and the support structure. Press means urge said support structure in the cavity, whereupon a more efficient thermal contact is either between said frontal edge and said bottom step, or between said base plate lip and said rim. A first thermal barrier () is between the heat sink and the thermal mass, and a second thermal barrier () surrounds the thermal mass. A shield () formed of a material having high thermal conductance covers said second thermal barrier and is in thermal contact with said heat sink.

Growing community of inventors

Esbo, Finland

Kurt Weckström