Single-channel eddy current testing instrument for automated testing. The ELOTEST IS3 is designed for installation in automated testing machines. The single-channel testing device, designed in protection class IP54, can be integrated directly into the production process, e.g. in automatic screw inspection machines. The integration into existing mechanics requires only little effort. With a frequency range from 10 Hz to 12 MHz, univeral signal filter and I/O interface, this testing device is an efficient alternative for fast crack detection and sorting tasks.