According to information from the China National Intellectual Property Administration, ABB Switzerland Ltd. has filed a patent titled “Gas Chromatography (GC) Device Based on a Thermal Conductivity Detector (TCD)”, with publication number CN121336109A. The application date is May 2024.

The patent discloses a gas chromatography (GC) system based on a thermal conductivity detector (TCD). The system includes a TCD furnace structure formed by multiple walls, equipped with an inlet valve and an outlet valve. A TCD element is integrated within the furnace, while a heating source is installed on one of the furnace walls. In addition, a thermoelectric generator (TEG) is thermally connected to the TCD element.

The device also includes a detector circuit configured to determine thermal gradients within the gas mixture entering the TCD furnace. The gas mixture consists of carrier gas and analyte gas. Based on the detected thermal gradient, the system generates electrical signals for analytical processing.

By optimizing thermal conductivity detection and signal conversion mechanisms, the proposed GC device enhances measurement stability and improves the accuracy of gas composition analysis, supporting more reliable detection in complex gas environments.