| 摘要 |
PURPOSE:To measure a flow rate stably for a long period by exposing and arranging a pair of electrodes, which are orthogonal to a flow passage and magnetic paths, between a pair of magnetic paths orthogonal to the flow passage of a fluid and arranging an electromagnetic current meter, which is formed by resin molding, in a fluid duct. CONSTITUTION:In this measuring instrument, a commercial power source or a dry cell is used to excite an electromagnetic coil 2 in a low frequency square wave system to form a magnetic path A between yokes 4 in each of both sides of a body 1. An induced voltage, which is generated when the conductive liquid flowing from front ends of guide grooves 8 in both sides of the body 1 toward rear ends passes orthogonally the magnetic paths A, is detected by both electrodes 5, and the flow velocity of the fluid is measured to measure the flow rate. |
