Automatic reservoir drain equipment - has two pump control circuits interrupted at different levels inside reservoir

摘要

The equipment (100) drains liquid from a reservoir having a variable level, and avoids discharging with the main liquid a secondary one whose specific gravity and electrical conductivity differ from those of the main one. It is partic. for draining sumps in garages, workshops etc. automatically when a set level is reached. It has two electrical circuits, each with a portion inside the reservoir and interrupted at a different level. for the first circuit, the interruption is between a point at the max. level and one below the min. level, while for the second it is between the latter point and one at min. level. When the interruption in the first circuit is closed by the liquid rising to max. level the drain pump is started up, while when the second circuit is interrupted it is stopped.