Thermal conductivity detection unit and gas chromatograph

A thermal conductivity detection unit, comprising:

• a thermal conductivity detector;
• and
• a controller configured to control the thermal conductivity detector,
• wherein the thermal conductivity detector includes:
• a first member;
• a second member having a higher thermal conductivity than the first member;
• a heating device housed in the second member;
• and
• a filament and a temperature sensor housed in the first member,
• the controller is configured to:
• control an output of the heating device with an output corresponding to a measurement result of the temperature sensor in a basic control, and
• when a temperature of the first member is outside a first range with respect to a temperature of the second member, control the output of the heating device with an output corresponding to the measurement result in an output reduction control, and
• in the output reduction control, the output of the heating device is controlled with an output that is reduced from the output corresponding to the measurement result in the basic control.