Description
SeekTech ST-305R Line Transmitter by RIDGID | Compact Multi-Frequency Locator (Model 66933)
SeekTech ST-305R Line Transmitter by RIDGID (Model 66933) is a compact, high-performance line transmitter built for professionals locating buried pipes, cables, and conductors. Delivering up to 5 watts of power and dual-frequency transmission, it pairs seamlessly with RIDGID SeekTech and NaviTrack® receivers to ensure fast, precise line tracing in residential, commercial, and industrial environments.
Features & Benefits
- Dual-Frequency Transmission: Transmits two frequencies simultaneously, giving operators optimal control over depth and distance when tracing underground lines.
- Flexible Power Options: Runs on a RIDGID 18 V Li-Ion battery or six C-cell alkaline or NiMH batteries for unmatched field versatility.
- Compact & Lightweight: Weighs less than 5 lbs for easy transport and all-day use on the job site.
- Strong 5 Watt Output: Powerful enough to send signals over long distances or through challenging soil conditions.
- Audio & Visual Feedback: Integrated LCD screen and audio tone confirm a good circuit connection before tracing begins.
- Rugged Construction: Built to RIDGID’s professional standards for durability in wet or dusty field conditions.
- RAM Mount Compatible: Easily mount to a vehicle or equipment cart for hands-free operation and greater efficiency.
Detailed Description
The SeekTech ST-305R Line Transmitter by RIDGID is engineered for accurate, dependable signal generation in utility locating applications. Delivering up to 5 watts of variable output power, it lets technicians trace metallic lines and conductors with exceptional precision. Whether you’re locating buried pipes, electrical cables, or telecommunication lines, the ST-305R provides the strength and clarity needed for reliable results in the field.
The unit’s dual-frequency capability (33 kHz and 262 kHz standard output) gives users the flexibility to select the right signal for different distances, depths, and conductive materials. The LCD screen displays line resistance and current flow, while audio feedback ensures a secure circuit connection before tracing begins — saving time and preventing misreads.
Powered by a RIDGID 18 V Li-Ion battery or six C-cell alkaline/NiMH batteries, the ST-305R adapts to any field situation. It’s fully compatible with RIDGID SeekTech® and NaviTrack® receivers, providing a complete locating solution that’s easy to carry and operate. A RAM-mount adapter is included for secure attachment to vehicles or inspection rigs — ideal for large-area mapping or municipal survey tasks.
Technical Specifications:
- Model: 66933 (SeekTech ST-305R Line Transmitter)
- Power Output: Up to 5 Watts (Variable)
- Frequencies: Dual output — 33 kHz and 262 kHz
- Display: LCD screen with current/resistance feedback
- Power Source: 18 V Li-Ion battery or 6 C-cell alkaline/NiMH batteries
- Weight: Approx. 4.9 lbs (2.2 kg)
- Compatibility: All RIDGID SeekTech® and NaviTrack® receivers
- Accessories Included: Two batteries & charger
In summary, the RIDGID SeekTech ST-305R Line Transmitter delivers professional-grade signal generation in a lightweight, portable package. The key benefit is its dual-frequency performance and multi-power design, which allow technicians to locate utilities quickly and accurately — even under challenging conditions.
Use Cases
- Utility Locating: Trace metallic pipes, conduits, and cables for construction and municipal projects.
- Telecommunications: Identify buried fiber optic marker cables and service lines without damaging infrastructure.
- Plumbing & Water Service: Locate underground pipes and connections before repairs or excavation.
- Industrial Maintenance: Use in plant or facility settings to trace underground electrical and data lines.
- Construction Safety: Prevent costly damage by mapping hidden utilities prior to digging or boring.
This product is ideal for contractors, surveyors, utility companies, and maintenance professionals seeking a portable, accurate line tracing solution with long battery life and reliable signal control.
Why Choose the SeekTech ST-305R Line Transmitter by RIDGID
- Expertly Engineered by RIDGID: A trusted leader in diagnostic and locating technology for over 100 years.
- Precision Meets Portability: High-output performance in a lightweight design for on-the-go field work.
- Dual Power Capability: Easily switch between battery types to keep working in any environment.
- Compatible System: Works seamlessly with RIDGID SeekTech and NaviTrack receivers for complete line locating solutions.
- RIDGID Lifetime Warranty: Guaranteed against defects in material and workmanship for the life of the tool.
FAQ
- Q: Which receivers are compatible with the SeekTech ST-305R Line Transmitter?
- A: The ST-305R is compatible with all RIDGID SeekTech® and NaviTrack® receivers, including the SR-20 and SR-60 models.
- Q: How many frequencies does the ST-305R transmit at once?
- A: It can transmit two frequencies simultaneously, allowing operators to compare and select the clearest signal for each application.
- Q: Can the transmitter run on different battery types?
- A: Yes. It operates on RIDGID 18 V Li-Ion batteries or six C-cell alkaline/NiMH batteries for flexibility in the field.
Work smarter and locate faster with the SeekTech ST-305R Line Transmitter by RIDGID — a powerful, portable tool engineered for precision and reliability. Whether you’re tracing pipes, mapping cables, or conducting utility surveys, this transmitter delivers the accuracy and performance professionals depend on. Shop RIDGID diagnostic and locating tools or order your SeekTech ST-305R Line Transmitter today from J.M. McKinney Co — your authorized source for RIDGID professional equipment nationwide.


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