Abstract: A feed-through module for an analyzer, such as a gas chromatograph. The feed-through module is adapted for connection to a plurality of tubes and for conveying fluids between the tubes and an enclosed volume of a housing of the analyzer. The feed-through module includes a connection structure threadably secured to the housing and a feed plate removably mounted to the connection structure. A plurality of connectors are secured to the feed plate. The connection structure and the feed plate cooperate to define a plurality of internal flow networks. Each flow network is operable to convey one of the fluids between one of the connectors and the enclosed volume of the housing. Within each flow network, a stream of fluid is split and then recombined.

Abstract: A gas chromatograph for connection to a source of carrier gas and a source of a sample gas. The gas chromatograph includes a first bridge circuit with a sample sensor connected therein and a second bridge circuit with a reference sensor connected therein. The outputs of the bridge circuits are digitized and then subtracted from each other in a processor.

Abstract: The present invention is directed to a gas chromatograph having a display screen. The gas chromatograph includes an explosion-proof housing and a transparent panel secured to the housing. The display screen is disposed in the housing and is visible through the transparent panel. A gas chromatograph (GC) assembly is disposed in the housing and includes a column for separating components of the gas and a detector for detecting the components of the gas. An electronics assembly is disposed in the housing and includes a microprocessor and memory. A graphical user interface (GUI) software application is stored in the memory and is executable by the microprocessor to display a plurality of windows on the display screen. The windows contain information about the operation of the gas chromatograph.

Abstract: The present invention is directed to a gas chromatograph (GC) module having a column assembly and a printed circuit board mounted to a valve assembly. A plurality of electronic devices are mounted to the circuit board. The electronic devices include non-volatile memory, pressure sensors and detector devices.