Patent ID: 7861602

Claim:
An explosion-proof high temperature compatible multi-vortex flow meter for measuring a flow rate of a fluid in a flow tube, the multi-vortex flow meter comprising a vortex type detection means and a thermal type detection means, the vortex type detection means including: a measurement tube provided in a flow path of the flow tube and allowing passage of the fluid to be measured, a vortex generator provided in the measurement tube so as to be opposed to a flow of the fluid to be measured, and a vortex detector for detecting a change due to a Karman vortex generated by the vortex generator; and the thermal type detection means including a temperature-sensitive sensor and a heating temperature-sensitive sensor, both protruding into the flow path and formed of metal tubular bodies, wherein the metal tubular bodies of the temperature-sensitive sensor and the heating temperature-sensitive sensor are fixed, by welding in a liquid-tight fashion, to a metal container of the vortex detector while inserted therein so that temperature-sensitive portions of the temperature-sensitive sensor and the heating temperature-sensitive sensor protrude into the flow path, wherein lead wires of the temperature-sensitive sensor, the heating temperature-sensitive sensor, and the vortex detector are held together within the metal container, and wherein the lead wires are led out toward a flow rate converter via a metal pipe mounted to the metal container.