| 摘要 |
The present invention relates to the metered dispensation of fluid. A preferred application relates to dispensing nutrients in the art of hydroponics to regulate the concentration of such nutrients in a solution that supports plant growth. Disclosed is a system and method for metered dispensation of fluid, comprising: a conduit for receiving fluid from a reservoir 4, the conduit having a downstream section for dispensing fluid through a downstream end of the conduit 12; an airflow inlet upstream of the downstream section of the conduit; and an airflow controller 6 for controlling airflow through the airflow inlet via a low pressure air valve 1, wherein the airflow controller is arranged to admit air to the conduit through the airflow inlet, the admitted air defining an upstream end of a slug of fluid created in use in the downstream section of the conduit. |
