Two chamber pumps and related methods

摘要

Two chamber pumps and related methods provide a platform for measuring flow rate in about real time without contacting the material being pumped. Pressure and optional temperature sensors disposed in a pressurized chamber allow for flow material delivery calculations after being calibrated or by knowing the initial volume of the flow material to be delivered.

主权项

1. A device comprising:
a pressurizable, fluid-tight, sealed first chamber, the first chamber comprising a flexible material that is expandable and collapsible depending on a pressure of a pressurized substance within the first chamber to define a variable volume of the first chamber; a second chamber fully enclosed within the pressurized substance of the first chamber for holding a flow material; at least one flow lumen in flow material communication with the second chamber; at least one sensor disposed in the first chamber; a flow controller disposed along the flow lumen; and a microprocessor for calculating flow rate from data provided by the at least one sensor, the flow rate calculation accounting for the variable volume of the first chamber; wherein the first chamber is configured such that when the pressurized substance having a pressure higher than the flow material in the second chamber is in the first chamber, the pressurized substance effects a change of volume of the second chamber; and wherein the microprocessor controls the flow controller.