Abstract: A control system apparatus for a fluid distribution system includes a low-voltage circuit and a positive displacement disc in a throughput line such that as fluid displaces the positive displacement disc a magnet associated therewith is also rotated. The rotating magnet sets up a magnetic flux that is sensed by a switch in close proximity to the rotating magnet and when the switch closes a low-voltage current is allowed to pass to a time delay relay, which in turn monitors the duration and strength of the low-voltage current and can, under program control, further actuate another branch of the low-voltage circuit, which causes a normally open valve to be closed by a solenoid. As the solenoid is actuated, the water flowing in the throughput line is shut off.

Abstract: The invention relates to a fluid flow monitor and control system which prevents excessive fluid loss and property damage. The invention warns of impending distribution pipe freeze conditions, or ruptures from other causes, shuts off the fluid supply, and vents and drains the piping network under freeze and rupture conditions. Furthermore, the invention shuts off fluid flow if the volume of flow or the velocity exceeds desired norms. An example of its application is as a water main shut-off for residential houses and commercial buildings, it also can be used for industrial processing applications.