Abstract: A fluid dispensing device and its method of operation are disclosed. The device includes a feedback system which allows the device to respond in a timely and measured manner to changes in the dispensing flow rate of fluid from the device. The feedback system operates effectively even under conditions where the cause of increase or decrease in flow rate is not unequivocally known or reasonably capable of direct measurement. The device has a fluid reservoir which has an outlet which optionally may have a flow or pressure resistance unit incorporated, into the outlet, and an electric (preferably electrochemical) gas generation module or reversible pump which provides gas pressure to dispense the fluid from the reservoir. A sensor is provided for detection and measurement of an internal or external operating parameter which is indicative of flow rate of the fluid being dispensed.