Patent ID: 6943690

Claim:
A flow verification sensor apparatus, for use with a constant volume pump that pumps a liquid product from a container comprising: a) a flow tube having a bore, the flow tube having an upper end and a lower end, the upper end adapted and configured to be in fluid communication with the constant pump and the lower end adapted and configured to be in fluid communication with the liquid product; b) a plummet positioned in the bore of the flow tube; c) a sensor positioned proximate the flow tube and at an upward distance from the lower end; d) the plummet moveable from a first, at rest position to a second position, when the sensor senses the plummet; and e) a timer for measuring a length of time for the plummet to move from the first position to the second position after activation of the pump, the plummet being raised by flow of the liquid product.