3M iD markers are designed to provide an accurate, convenient, long-lasting method of marking underground assets. In addition, these markers may beprogrammed to include customer-specific information such as facility data, type of application, material type and size, placement date and other important details.
There is no guess work with the 3M™ Electronic Marker System. 3M markers operate even in the presence of metal conductor pipe, metallic conductors, fences, AC powerlines and electronic markers of other utilities. All EMS markers are color-coded to APWA standards for visual reference and each utility has its own frequency.
For gas utilities, all markers are yellow in color. EMS signals provide positive identification of each utility, thus helping to reduce the risk of accidentally locating and excavating other buried facilities.