Compact thermal conductivity housing for gas chromatograph

The compact thermal conductivity detector design with radially arranged gas flow paths addresses space constraints in gas chromatographs, enabling multiple detectors with shared references for improved accuracy and cost-effectiveness.

WO2025207708A1PCT designated stage Publication Date: 2025-10-02ROSEMOUNT INC
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Patent Information

Application Number
PCT/US2025/021451
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-28
Filing Date
2025-03-26
Publication Date
2025-10-02

AI Technical Summary

Technical Problem

Existing thermal conductivity detectors for gas chromatographs occupy significant space within the temperature-controlled oven, limiting the number of detectors that can be housed and affecting measurement accuracy and cost efficiency.

Method used

A compact thermal conductivity detector design with radially arranged gas flow paths on a cylindrical housing, allowing multiple thermistors to share a common reference, reducing space usage and improving measurement accuracy.

Benefits of technology

The compact design enables multiple thermal conductivity detectors to be housed within the oven, enhancing measurement accuracy and reducing costs by optimizing space utilization.

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Abstract

A thermal conductivity detector for a gas chromatograph is provided. The thermal conductivity detector includes a circular thermal conductivity detector body (500) having a sidewall (502) and a top surface (504). A plurality of gas flow paths is formed in the circular thermal conductivity body. Each gas flow path includes a gas inlet (506) disposed on the sidewall and a gas outlet (508) disposed on the sidewall. The gas inlet (506) and the gas outlet (508) extend inwardly from the sidewall (502). Each gas flow path is in fluidic communication with a thermistor mounting hole (510), the thermistor mounting hole (510) extending from the top surface (504) of the thermal conductivity detector body (500). A process gas chromatograph (100) using the thermal conductivity detector is also provided.
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Citation Information

Patent Citations

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    CN115427799A

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    US20070144238A1

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    US20080069178A1

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    US20190250131A1

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    WO2021236898A1