A moisture sensor for harvested crop, the moisture sensor comprising: - a sensing device (110/400/600) configured to sense an electrical characteristic of the harvested crop, and generate a sensor signal (120/440) representative of the electrical characteristic, the sensing device comprising an array of electrodes (210/410/610) for sensing the electrical characteristic; - a processing unit configured to receive the sensor signal (120/440) from the sensing device (110/400/600), the processing unit further being configured to process the sensor signal to derive a moisture level of the harvested crop; and - an output terminal connected to the processing unit for outputting an output signal representative of the moisture level as derived by the processing unit, wherein the sensing device (110/400/600) is further configured to operate in one of a plurality of different operating modes when sensing the electrical characteristic, each operating mode having a different moisture level sensitivity characteristic, and wherein the processing unit is further configured to receive an operating parameter associated with the harvested crop and to select an operating mode of the plurality of different operating modes for the sensing device, based on the operating parameter, characterized in that the selection of the operating mode comprises selecting a pair of electrodes of the array of electrodes (210/410/610) from a plurality of different selectable pairs of electrodes for sensing the electrical characteristic, wherein the different selectable pairs of electrodes (210/410/610) have different distances (D1, D2, D3) between the respective electrodes and different moisture level sensitivity characteristics. - a sensing device (110/400/600) configured to sense an electrical characteristic of the harvested crop, and generate a sensor signal (120/440) representative of the electrical characteristic, the sensing device comprising an array of electrodes (210/410/610) for sensing the electrical characteristic; - a processing unit configured to receive the sensor signal (120/440) from the sensing device (110/400/600), the processing unit further being configured to process the sensor signal to derive a moisture level of the harvested crop; and - an output terminal connected to the processing unit for outputting an output signal representative of the moisture level as derived by the processing unit, wherein the sensing device (110/400/600) is further configured to operate in one of a plurality of different operating modes when sensing the electrical characteristic, each operating mode having a different moisture level sensitivity characteristic, and wherein the processing unit is further configured to receive an operating parameter associated with the harvested crop and to select an operating mode of the plurality of different operating modes for the sensing device, based on the operating parameter, characterized in that the selection of the operating mode comprises selecting a pair of electrodes of the array of electrodes (210/410/610) from a plurality of different selectable pairs of electrodes for sensing the electrical characteristic, wherein the different selectable pairs of electrodes (210/410/610) have different distances (D1, D2, D3) between the respective electrodes and different moisture level sensitivity characteristics.