| 摘要 |
<p>A flow meter 10 comprises an inflow chamber 12 having a first fluid inlet 18, an outflow chamber 14 housed in the inflow chamber 12 and having a second fluid inlet 30, which is in fluid communication with the inflow chamber 12, and a fluid outlet 32 by which fluid can drain from the outflow chamber 14, and a sensing device 16 having a elongate sensor 44 which is positioned at, or adjacent to and downstream of, the second fluid inlet 30. The second fluid inlet 30 is of limited dimensions so that, in use, a head of fluid 50 is formed in the inflow chamber 12 and the flow rate of the fluid 50 passing through the second fluid inlet 30 is monitored based on the extent of the elongate sensor 44 which is covered by the fluid 50. <IMAGE></p> |
