Liquid flow meter

A method for measuring waste water flow, comprising flowing waste water into a compartment enclosure containing a volumetric container having a specified fluid volume capacity mounted upon a rotatable pivot having an axis of rotation, creating a moment differential by a counterbalance weight and thereby maintaining said volumetric container against a rotation stop limit affixed to said compartment enclosure determining rotational position of said static filling position of volumetric container,

• filling said volumetric container by flow through an influent conduit in an upper part of said compartment enclosure until moment of said specified liquid capacity results in a balanced moment about said rotational pivot axis,
• flowing further fluid flow into said volumetric container to result in a moment imbalance causing initiation of rotation of the volumetric container about said rotational pivot axis,
• said initiation of rotation resulting in flow of fluid contained within said volumetric container over an elongated pouring lip of the volumetric container,
• the flow of fluid over said elongated pouring lip resulting in a shift of centroid of mass of the fluid contained within said volumetric container,
• the shift in centroid of mass of liquid contained within said volumetric container increasing the moment imbalance about said rotatable pivot axis,
• increasing the moment imbalance about said rotatable pivot axis to accelerate rotation of said volumetric container until a discharge position rotational stop limit impacts,
• impacting said volumetric container upon said rotational position limit of discharge position stop to thereby cause inertia momentum flow of fluid contained within the volumetric container,
• the inertia momentum flow of fluid contained within said volumetric container causing rapid discharge of fluid contained by the volumetric container,
• a lower part of said compartment enclosure buffering pulsed fluid flow of said volumetric container discharge channeling fluid into said effluent port thereby minimizing fluid remaining in the said compartment enclosure,
• rapidly returning the volumetric container to the rotational stop in the static filling position by a moment imbalance caused by said counterbalance weight upon emptying said volumetric container,
• counting the total number of cycles to provide a total cycle count.