Abstract: A sensor device with a combined sensor to detect a force applied to the sensor by an object made of a material, a position of the force, and a capacitive coupling of the sensor with the object, including: a database to provide relationships Zn of a capacitive coupling CSEN-OBJ-MATn of the sensor with an object OBJ made of a material MATn for a number N of materials MATn, the relationships depending on a force Fext,OBJ of the object OBJ applied to the sensor, wherein n=1, 2, . . . , N and N?1; a detection unit to determine force Fext(t), position POSFext (t), and capacitive coupling CSEN-OBJ(t) from sensor data of the sensor; an evaluation unit to determine a material MAT* of the object OBJ applying the force Fext(t) to the sensor based on the relationships Zn, wherein MAT* ? MATn; and an output unit to output the material MAT*.