The invention relates to a sensor device (1) for in vivo monitoring of glucose in diabetics, wherein the sensor device (1) comprises a micro-array with multiple sensors (11, 12, 13, 14) to be implanted subcutaneously in a patient wherein each sensor may be activated separately for monitoring purposes. Preferably, the sensors (11, 12, 13, 14) in said micro-array are comprised in a mold that is covered by a metal membrane (3a, 3b), and even more preferably, the membrane is electrically openable to expose each specific activated sensor in the micro-array separately for monitoring purposes. A transceiver may be provided for monitoring signals obtained by each specific activated sensor (11, 12, 13, 14) to an external receiver and the receiver may be connected to a display means for displaying data representative of the signals obtained by the specific activated sensor (11, 12, 13, 14).
