| 摘要 |
An electromagnetic flow meter (1) for measuring flow rate of a fluid passing therethrough comprises a conduit (3) defining a fluid inlet (7), a fluid outlet (7) and a measuring section (10) 5 positioned between the inlet and the outlet. The flow meter also comprises a single coil (17) for generating a magnetic field across the measuring section and electrodes (14-1, 14-2) for detecting induced electrical potential due to the fluid passage. In one preferred embodiment the coil is arranged to surround a section ofthe measuring section over a segment angle of between 140 and 180 degrees. In another preferred embodiment, the electrodes are positioned so that 10 they are offset from being opposite each other on the centreline of the measuring section, by an offset angle of between 5 degrees and 45 degrees. (Figure 2B) |
