Sensors that are capable measuring the rate of flow of a fluid that passes over the electrodes of the sensor. In these sensors, an electrode, designated the flow rate-determining electrode, is used in conjunction with the conventional electrodes, e.g., the working electrode, the reference electrode,...http://www.google.de/patents/US6801041?utm_source=gb-gplus-sharePatent US6801041 - Sensor having electrode for determining the rate of flow of a fluid
