Patent ID: 6079264
Filing Date: 2000-06-27
Classification: G01F

Abstract:
A flow rate detector comprising:a detection pipe provided in a fluid channel;a supporting member disposed centrally within said detection pipe, said supporting member having a sensor holding portion and a broadening portion, said sensor holding portion having a predetermined width, said broadening portion being adjacent to one end of said sensor holding portion, the width of said broadening portion gradually increasing from its distal end toward said sensor holding portion; anda thermosensitive flow rate sensor built in a side surface of said sensor holding portion so that it is exposed in said detection pipe;wherein said detection pipe has a straight pipe portion on the upstream side of said supporting member, and said straight pipe portion has a predetermined inside diameter D and has a length L1, wherein said predetermined inside diameter D and said length L1 define a relation L1.gtoreq.D/2.