Patent ID: 6588268
Filing Date: 2003-07-08
Classification: G01F

Abstract:
A flow rate sensor comprising:a flow rate detector having a heat function and a temperature sensing function; a pipe line for fluid to be detected which is formed so that heat from the flow rate detector is transferred to and absorbed by the fluid, wherein temperature sensing which is affected by a heat absorption effect of the fluid due to the heat is executed in the flow rate detector, and the flow rate of the fluid in the pipe line is detected on the basis of the temperature sensing result; at least one unit retaining portion formed on a casing in which the pipe line is formed, the unit retaining portion being disposed adjacent to the pipe line; and a flow rate detecting unit retained by the unit retaining portion, wherein the flow rate detecting unit comprises the flow rate detector, a first heat transfer member provided to the flow rate detector, a first electrode terminal electrically connected to the flow rate detector and a first base portion made of synthetic resin, the first base portion is retained by the unit retaining portion, the flow rate detector is sealed within the first base portion, the first heat transfer member extends from the first base portion into the pipe line, and the first electrode terminal extends from the first base portion to the side opposite the pipe line.