The RIDGID SeekTech ST-305R (50793R) is a compact yet powerful multi-frequency transmitter. It can be used with any RIDGID SeekTech or NaviTrack receiver (sold separately) to find buried conductors such as pipes, cables, and wires. This allows the line's location to be correctly marked so it can be exposed for repair or avoided during excavation.

With its battery shoe, the ST-305R can be powered by a Li-Ion 18V rechargeable battery (not included) or six alkaline or NiMH C-cell batteries. In addition, a Li-Ion 18 V rechargeable battery can be used simultaneously with the internal C-cell batteries. If the voltage falls below 15.4 V or if the battery dies, the ST-305R switches to internal batteries.

The ST-305R has three operating modes that can be used during a locate. The mode used depends on the circumstances of the locate.

Direct Connect - The leads connect directly to the target conductor and a suitable ground.

Inductive Clamp - The optional inductive clamp encircles the target conductor when metal-to-metal contact is not possible or unable to produce the desired result.

Inductive - The ST-305R is placed over a conductor. The internal antenna induces a signal on to the target conductor.