A sensor device has at least one array of sensor spots disposed on or in a common substrate or retained by a common substrate. At least one first group of several sensor spots of the array is configured as measurement spots which respond to at least one parameter to be measured, while at least one second group of several sensor spots of the array is configured as reference spots which do not respond or respond only insignificantly to the parameter to be measured. The reference spots are embodied in such a way relative to the associated measurement spots that the reference spots respond to at least one boundary condition variable to which the measurement spots respond as well and which influences the at least one test signal such that the reference signal directly or indirectly represents the boundary condition variable or a change in the boundary condition variable.