What is an Electronic Marker?

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An Electronic Marker is a small passive detectable device which is permanently buried at points of interest that the user may have to return and excavate sometime in the future. They don’t have any batteries or other user serviceable components inside, and have a usable life that is measured in decades.

They are typically used to mark specific points of an underground infrastructure such as buried cable splices, water or gas valves, corporation stops in non-metallic lines, butt ends, diameter changes, or any other point underground that the owner of the utility may have to return to in the future.

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