Self-dispensing spaced electronic markers

摘要

A marker tape for location of a buried conduit, having a plurality of electronic markers spaced thereon at predetermined intervals. The distance between the markers encodes information about the buried conduit. The tape may be a nonconductive ribbon or cord, and the markers are preferably passive circuits tuned to a specific frequency. The tape ribbon embodiment may include slots therein for receiving the markers. The markers may be oriented in a predetermined pattern to encode additional information.