Thermal conductivity detector
AssigneeShimadzu Corporation
InventorKazunori Takahashi
Life of this patent
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Abstract
A thermal conductivity detector (TCD) includes: a detection channel through which a gas to be measured flows as a fluid; a thermal conduction part that has a filament provided at a position in the detection channel where the filament comes into direct contact with the fluid flowing through the detection channel, thereby conducting heat through the fluid flowing through the detection channel; and a detection circuit for detecting an electric signal based on a change in a voltage or a current of the filament. The thermal conduction part has a plurality of filament sections that are substantially parallel to a flow direction of the fluid flowing through the detection channel.
Claims5
A thermal conductivity detector (TCD) comprising:
- a detection channel through which a gas to be measured flows as a fluid;
- a thermal conduction part that has a filament provided in a flowing route of the fluid in the detection channel so that the filament comes into direct contact with the fluid flowing in the flowing route through the detection channel, thereby conducting heat through the fluid flowing through the detection channel;
- and
- a detection circuit for detecting an electric signal based on a change in a voltage or a current of the filament, wherein
- the filament has a plurality of filament sections that are provided substantially parallel to a flow direction of the fluid flowing through the detection channel, and that come into direct contact with the fluid flowing in the flowing route through the detection channel,
- the plurality of filament sections are electrically connected with each other in series or in parallel, and
- the fluid in direct contact with the plurality of filament sections flows parallel to the plurality of filament sections.
Dependencies are inferred from the claim text.