Patent ID: 8939012
Filing Date: 2015-01-27
Classification: G01N

Abstract:
1. A thermal conductivity detector comprising: a flow-path through which a measurement gas is caused to flow, and a heating element, for detecting thermal conductivity of the measurement gas according to a magnitude of an amount of heat taken away from the heating element by the measurement gas, disposed inside the flow-path, the heating element comprising of a beam, formed from a substrate, and a thin metal film formed on the beam, the ends of the thin metal film being connected with a pair of electrodes formed on the surface of the substrate, respectively, wherein said heating element is provided with a beam including a part where the beam is folded at a predetermined angle, the part being formed at the central part of the beam, wherein at least either one of a thickness, and a width of the beam is set such that a direction of deformation of the heating element, due to heating of the heating element, is within a plane horizontal with the surface of the substrate.