| 摘要 |
A flow meter for monitoring liquid flow at low or intermittent rates, such as waste water gravity flow from a reverse osmosis system. Water flow from the system enters a meter chamber vented to atmosphere. Water drainage from this chamber is adjusted to match the incoming water flow, and the level at which this occurs is determinative of the rate of waste water flow. Various ways are disclosed to adjust the rate of water drainage from the chamber, including the use of multiple drainage tubes.
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