| 摘要 |
PURPOSE:To standardize magnetic circuits by inserting auxiliary cores into a magnetic circuit in an oscillator so that the electromotive forces outputted from plural oscillators having the different inner diameters of conduit lines in which fluid to be measured flow are made to coincide with each other in the same flow rate. CONSTITUTION:Every conduit line 1 having electrodes 3, 3a which is accommodated in a housing 14 with the same standard has the same outer diameter and its individual inner diameter is obtained by changing the thickness of a laying 2. Notch parts 14a, 14b are formed on the housing 14 so that the auxiliary cores 7, 7a are inserted and fixed into/on the parts. Magnetic flux density due to the electromotive force generated by coils 5, 5a is changed by selecting the length of the auxiliary cores 7, 7a, so that the same electromotive force is obtained in the same flow rate even if the inner diameter is changed. Consequently the coils 5, 5a are standardized. |
