CD/CM (Current Direction and Current Measurement) Clamp.  This is used to identify individual utilities in congested areas.  It provides positive identification when used with a CD signal and can also provide current measurement of a transmitter signal to further identify individual utilities.

For CD information and identification a RD8KPD(B) and Tx-10(B) transmitter are required.  If only current readings are required, this clamp can be used with all locator models over the range of transmitter signals.