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The RIDGID® SeekTech® ST-510 transmitter is used to generate an “active” signal on a metallic underground line so that it may be traced with a compatible receiver. This allows the line’s location to be marked so it can be exposed for repair or avoided during excavation.

The ST-510 features an LCD display that provides instant visual feedback on line resistance and current flow. Additionally, it provides the user audio feedback to confirm a good circuit before beginning a trace.

The ST-510 line transmitter can apply an active tracing signal to a target conductor in three ways:

1. Direct Connect Method – The transmitter’s leads are connected directly to the target conductor and a suitable ground
2. Inductive Clamp Method (optional accessory, sold separately) – The jaws of the inductive clamp accessory encircle the target conductor; there is no metal-to-metal contact
3. Inductive Mode – The transmitter is placed over, and in-line with, a conductor. Its internal antenna induces a signal onto the target conductor