| 摘要 |
The invention relates to an oval gear meter for flow measurement, the meter comprising: two oval-shaped gears (1, 2) arranged to rotate in synchronism in a chamber provided in a housing (3), through which chamber a medium to be measured is arranged to flow, the rotating motion of the gears (1, 2) being pro-portional to the flow rate. The meter is equipped with means for detecting the rotating motion of the oval gears (1, 2). The means for detecting the rotating motion of the oval gears (1, 2) comprise a permanent magnet (8) arranged to one of the oval gears (1 or 2), centrically with the rotating shaft (7) thereof, and a sensor circuit (9) arranged on the outer surface of the housing (3) wall, at a location coinciding with that of the permanent magnet (8). |
