More than 15 years ago the first EBINGER underground markers were buried for scientific purposes. Since then the system has been refined and has become of more and more importance for civil engineering, public utilities and energy suppliers.

The EBEX 300 locator transmits pulses of low frequency which will cause passive electronic underground markers of halo or cylindrical shape to respond with a defined signal of higher frequency. This response is detected selectively and transduced into an audio alarm. The underground markers can be frequency-coded to indicate specific target points.

The advantage of the system consists in his selective detection of markers. Metal scrap, mineralized soil or ground conductivity will not influence the location result. Underground markers can also be located in the vicinity of large masses of metal.