A system for communicating information from an array of sensors is disclosed. The system comprises a sensor array that includes a plurality of sensors, wherein each sensor senses a physical property of a material that is in communication with the sensor. The system further comprises signal processing circuitry associated with each sensor that integrates the output of the sensor over time and compares the integrated output to a threshold. The system further comprises a communication network coupled to the signal processing circuitry that outputs information indicating that the integrated output corresponding to a given sensor has reached the threshold.