Patent ID: 8573051
Filing Date: 2013-11-05
Classification: G01F

Abstract:
1. A flow rate measurement device, comprising: a main flow pipe having a main flow passage through which a gas passes; an orifice for limiting a flow of the gas in the main flow passage; and an auxiliary flow passage block provided with an auxiliary flow passage having one end communicating with a pair of introduction ports opened in the main flow passage on the upstream side of the orifice and the other end communicating with a pair of discharge ports opened in the main flow passage on the downstream side of the orifice, wherein the auxiliary flow passage includes: wherein the upstream end of the detection flow passage is positioned on the upstream side of the main flow passage relative to the both ends of the upstream auxiliary flow passage, and the downstream end of the detection flow passage is positioned on the downstream side of the main flow passage relative to the both ends of the downstream auxiliary flow passage.