Patent ID: 7530267
Filing Date: 2009-05-12
Classification: G01F

Abstract:
1. A flow rate measuring apparatus comprising: a main body portion projecting into a main passage, said main body portion having a circuit housing portion disposed internally; a measuring passage formed on said main body portion at a projecting end of said circuit housing portion, a portion of a measured fluid flowing through said main passage being induced to flow through said measuring passage; a flow rate detecting element disposed inside said measuring passage; a control circuit housed inside said circuit housing portion, said control circuit driving said flow rate detecting element and processing a signal therefrom; and a plate including a wall surface that constitutes said measuring passage, wherein the plate holds the flow rate detecting element and the control circuit, wherein: said measuring passage comprises: said flow rate detecting element is disposed in said third passage, and wherein: said flow rate detecting element and said control circuit are installed so as to be positioned substantially in a common plane with the wall surface of the plate constituting said measuring passage.