Patent ID: 6679113
Filing Date: 2004-01-20
Classification: G01F

Abstract:
A flow rate sensor comprising:a holder at a first end of which a flat detector auxiliary portion is formed integrally, an element accommodating recess portion being formed in a major surface of said detector auxiliary portion; a flat flow rate detecting element for detecting a flow rate of a fluid being measured, said flow rate detecting element being mounted to said holder so as to be housed inside said element accommodating recess portion such that a major surface of said flow rate detecting element is positioned in a common plane with a major surface of said detector auxiliary portion; a circuit board to which a control circuit for controlling an electric current flowing to said flow rate detecting element is mounted; a terminal built into said holder such that a second end of said terminal is electrically connected to said circuit board, a first end of said terminal being positioned in a common plane with said major surface of said detector auxiliary portion and extending onto said detector auxiliary portion; a frame-shaped peripheral wall member mounted to said holder so as to surround an electrical connection portion formed by electrically connecting an electrode portion formed at a first end of said terminal of said flow rate detecting element and said first end of said terminal; and a heat-curing addition-reaction sealant injected inside said peripheral wall member so as to embed said electrical connection portion, wherein a bottom surface of said peripheral wall member is secured by bonding to said detector auxiliary portion and said flow rate detecting element by an elastic adhesive.