Magnetic inductive sensor for measuring flow of fluid through pipe has short length of pipe with two saddle-shaped field coils on outside, with ferromagnetic coupling elements

摘要

The magnetic inductive fluid flow sensor (10) has a short straight length of non-ferromagnetic pipe (11) between two flanges (12,13). It has two saddle-shaped field coils (15,16) on the outside, with ferromagnetic coupling elements (17-20). The ferromagnetic coupling elements have projecting parts (17a-20a) covering the field coils. Packets of ferromagnetic laminae form pole shoes (21,22) lying between the field coils and the pipe. There are electromagnetic return circuits (23,24) near the ends of the pipe.