A method for monitoring the surface of a device to physical and/or environmental exposure, the method comprising: (a) attaching at least one sensor including a reactance autotuning integrated circuitto a surface of a device; (b) attaching a reader in proximity to the sensor; (c) measuring a reference reactance of the sensor with the reader at a selected frequency; (d) continually monitoring forchanges in the reactance of the sensor at the selected frequency, wherein changes to the reactance are digitized by the autotuning circuit; and (e) comparing differences between the reference reactance and changes to the monitored reactance to determine if said surface of the device has been subjected to physical and/or environmental exposure.