Abstract: A system and method for noninvasive and nondestructive identification of electrical sensors and cables in multi-channel data acquisition (DAQ) systems includes a probe comprising a slotted, wound toroid in series with a blocking capacitor connected to, and powered by, a frequency generator. The frequency generator is tuned to output a test signal set at a multiple harmonic frequency of the DAQ system carrier or scanner frequency. This test signal is then induced into the electrical sensor cable by placing the cable into the toroid slot, whereby the sensor cable provides a path for the test signal to combine with the DAQ system operating frequency so that the resultant combined signal is displayed on the DAQ system monitor. In this way the specific sensor and cable may be identified to avoid the normal procedure of disconnecting or shorting the sensor cables.