| 摘要 |
PCT No. PCT/EP90/00018 Sec. 371 Date Sep. 14, 1990 Sec. 102(e) Date Sep. 14, 1990 PCT Filed Jan. 4, 1990 PCT Pub. No. WO90/07694 PCT Pub. Date Jul. 12, 1990.An electromagnetic flowmeter comprises a pressure-resistant measurement tube made of a heat-resistant material and a stainless steel casing which surrounds the measurement tube. Disposed in a sealed space between these two parts is a magnetic device comprising at least pole pieces and windings, and one or more measuring electrodes are arranged in the measurement tube. To ensure effective sealing even at high temperatures by simple means, at least one end of the stainless steel casing is bent to form a concentric inner ring and a steel compensation ring surrounds the inside of the inner ring. The steel from which the compensation ring is made has a coefficient of thermal expansion which is between that of the material of the measurement tube and that of the stainless steel of the casing. |
