Abstract: A flow rate meter comprises a disposable fluid transport portion and a reusable interface connector removably attached to the transport portion. The transport portion includes a flow conduit having an input and an output, while the interface connector provides feedback to a desired location. First and second portions of control circuitry are, respectively, associated with the transport portion and the interface connector. The first circuitry portion includes a plurality of electrodes and derives flow rate. The device measures a range of flow rates and is adapted, for example, for use in micro-fluidic systems including fluids administration to a patient's body.

Abstract: A device for measuring fluid flow rates over a wide range of flow rates. The invention is particularly adapted for use in micro-fluidic systems including fluids administration to a body of a patient. The device operates by producing characteristics variations in the fluid, or pulses, that are subsequently sensed by more than one detector spaced apart from the point of creation of the mark to derive a flow rate. Each pulse comprises a small fluid volume, whose characteristics are different from the mean characteristics of the fluid, such as by composition variations created by electrochemical means, such as by electrolysis of a solvent, electrolysis of a dissolved species, or electrodialysis of a dissolved ionic species, or a thermal variation created by focused electromagnetic radiation.

Abstract: A device for measuring fluid flow rates over a wide range of flow rates. The invention is particularly adapted for use in micro-fluidic systems including fluids administration to a body of a patient. The device operates by producing characteristics variations in the fluid, or pulses, that are subsequently sensed by more than one detector spaced apart from the point of creation of the mark to derive a flow rate. Each pulse comprises a small fluid volume, whose characteristics are different from the mean characteristics of the fluid, such as by composition variations created by electrochemical means, such as by electrolysis of a solvent, electrolysis of a dissolved species, or electrodialysis of a dissolved ionic species, or a thermal variation created by focused electromagnetic radiation.