a system for acquiring environmental data from a plurality of sensors is provided with a microprocessor having a sensor input for receiving data from a sensor , a memory access port for communicating with a memory system , and an output port for issuing data . plural sensors each produce associated sensor signals responsive to respective characteristics of an environment . the sensor signals are propagated to the sensor input of the microprocessor , and a memory system is coupled to the memory access port of the microprocessor for storing calibration data associated with the plurality of sensors . a communications arrangement is coupled to the output port of the microprocessor .