| 摘要 |
<p>The invention provides a low-flow metering device (10) for measuring the flow of an amount of liquid exceeding 0.05 ml., comprising a first chamber (12) having an inlet (14), and an outlet (16) in fluid communication with a second chamber (17), the first chamber (12) containing an element (22) creating a laminar flow (24) and the outlet (16) of the first chamber being provided with a drop generator (19) leading to the second chamber (17) and sized to release a series of droplets (18), each of the droplets forming and breaking away under its own weight from liquid in the drop generator orifice, an overflow conduit (21) extending between an upper area of the first chamber (12) and a lower area of the second chamber (17) for equalizing gas pressure between the two chambers (12, 17), electronic means (28) positioned in the second chamber (17) below the drop generator (19) for counting the passage of each droplet (18) exiting therefrom, and an information processing unit (32) connected to the electronic means (28) for receiving and recording information selected from the group consisting of total flow (36), start time (38), flow per unit time (34), electrical conductivity of liquid (42), elapsed time (40) and combinations thereof.</p> |
