The 20973 SeekTech Inductive Clamp allows users to apply a signal to a cable or pipe when it is not possible to connect transmitter leads directly to the target conductor. When its jaws are closed around a cable or pipe, the clamp couples the transmitted signal onto the conductor by induction. Once the signal is applied to a conductor, it can be traced using a compatible receiver, such as the SeekTech SR-20.

The clamp should only be used on insulated conductors. When using the clamp, the target conductor should be grounded at each end. Otherwise, the signal may not be strong enough to locate. When applying the clamp between two grounded points, the signal will only be on the section between grounds (see Figure 1). The clamp may be used with frequencies of 8kHz to 262kHz.