Fecha de publicación: -- Fuente: Wipo "Sensorization" Disclosed herein are systems, sensors and methods for determining a concentration of an analyte in a fluid. The system comprises a sensor configured to generate a differential response to a constant concentration of the analyte; and an acquisition device configured to determine the concentration of the analyte from the differential response. The method comprises exposing the fluid to a sensor which is configured to generate a differential response to a constant concentration of the analyte; and measuring a differential response of the sensor to the analyte.