Patent ID: 7712361
Filing Date: 2010-05-11
Classification: G01F

Abstract:
1. A flow rate measuring apparatus which is installed on piping by insertion thereof into an insertion hole formed in said piping for measuring a flow rate of fluid to be measured that passes through a piping passage defined in said piping, said apparatus comprising: a base that has a base main body which is formed at its base end portion with a connector protruding to an outside of said piping, and a flange which is formed on said base main body and is fitted into said insertion hole; a plate that is made of resin and is attached to said base main body along a direction of flow of said fluid to be measured; a flow rate detection element that is formed on said plate so as to be exposed therefrom for detecting the flow rate of said fluid to be measured; a circuit board that is arranged on said plate at a side thereof near said connector and has a control circuit built therein for driving said flow rate detection element to process a signal of said flow rate detection element; a housing that is attached to said plate and is formed respectively with a fluid passage groove to cooperate with said plate to form a measuring passage which serves to guide said fluid to be measured and in which said flow rate detection element is disposed; wherein said housing is also formed with an enclosure portion which encloses said circuit board and a cover that closes said enclosure portion, and wherein said circuit board is recessed within said plate.