Patent ID: 8037751

Claim:
A flow rate measuring apparatus, comprising: a connector portion arranged outside a main passage in which fluid to be measured flows, for sending and receiving a signal externally; a main body portion which is extended from the connector portion to an inside of the main passage; a bypass passage which is formed inside the main body portion and to which a part of the fluid to be measured flowing in the main passage is led to flow; a flow rate sensing element which is arranged inside the bypass passage and has a flow rate detection portion on a surface thereof; a control circuit which drives the flow rate sensing element and processes a detection signal; a pair of metal terminals each of which includes an end portion connected to the connector, an embedded portion molded integrally with a resin portion constituting the main body portion, and an exposed portion exposed in the main passage; and a fluid temperature sensing element which is electrically connected between the exposed portions of the pair of metal terminals so as to be exposed in the main passage and includes a temperature sensing portion for sensing temperature of the fluid to be measured flowing in the main passage, wherein the fluid temperature sensing element is arranged at a position apart from an outer wall surface of a side face of the bypass passage, and the temperature sensing portion is arranged at a center between the pair of metal terminals exposed in the main passage by the same length or between extension lines thereof.