Shop Sonde Transmitters for Pipe & Utility Locating
Prototek has been innovating and manufacturing underground locating equipment for over 25 years. All of their products are manufactured here in the United States of America. The goal at Prototek is to engineer products to aid you to be accurate and efficient on the job site. Whether that includes pumping septics tanks, locating electrical lines or everything in between, Prototek products give you the performance technology, ease of use and durability you want.
Flushable Sonde Transmitters
Locate sewer lines and septic systems fast with flushable transmitters designed to travel through pipes while transmitting a strong, trackable signal. Ideal for non-invasive underground locating, these sondes provide accurate tracing without excavation.
Mini-Sonde Transmitters
Built for tight spaces and small-diameter pipes, mini sondes deliver precise locating in confined environments. Perfect for ducts, conduits, and narrow sewer lines where larger transmitters won’t fit.
Mid-Range Sonde Transmitters
Versatile and reliable, mid-range sondes are designed for everyday pipe and utility locating. Offering balanced frequency performance, they handle standard depths and pipe sizes with consistent accuracy.
Long-Range Sonde Transmitters
Engineered for deep and extended locating, long-range sondes provide maximum signal distance and penetration. Ideal for large pipelines, long sewer runs, and complex underground tracing.
More Sonde Products
Radiodection has a wide range of accessories for Sonde products including connectors which allow you to connect your line locating equipment onto rods/drain pipes with various size fittings.
See our Prototek Sonde Adapters
Download the detailed Prototek rodder sonde adapter PDF to compare thread sizes, rodder compatibility, configurations, and connection options before you buy.
PDF Downloads for Prototek Sondes, Adapters & Accessories
Download detailed Prototek flyers to compare sonde options, rodder adapters, frequencies, compatibility details, and product configurations before you buy.
How To Use a Transmitter?
Find out how underground locating equipment and Sondes work and help to locate the right spot along a line.
Locating Sondes Overview
A Sonde is a self-contained, battery-operated line locating transmitter used for tracing the paths of pipes, ducts, sewers and drains and in the precise location of blockages or collapses. This small electronic locator can be fitted to a flexible rod for insertion or pushing through pipes. The smaller diameter Sondes can be used in conjunction with jetting machines and blown through the duct.
Locating and Tracing a Sonde
Insert the locating Sonde in the drain or duct access and locate it while it is still just in view at the drain or duct entrance. Hold the locator vertical directly over the Sonde, keeping the antenna in line with the Sonde.
How Sondes Work in the Field
Sondes are inserted directly into pipes, ducts, or drains where they emit a signal that can be tracked from above ground. This allows operators to accurately determine location, depth, and direction of underground lines—even when dealing with non-metallic systems.
Common Applications:
- Sewer & Drain Lines – Track pipe routes and locate blockages
- Duct & Conduit Runs – Trace non-metallic utility paths
- Inspection Work – Verify underground layouts during camera inspections
- Maintenance & Repairs – Identify exact dig points before excavation
We offer the best underground locating equipment to assist you with accuracy and efficiency on job sites. All line locating tools are assembled in the USA. Flushable Transmitters and Line Locating Sondes come in different sizes and models to cover any underground locating needs.
Free On-Site Training
In addition to providing our customers with the best underground utility locator equipment for their needs, Locator Guys offers free, on-site training with every purchase. Our experienced team will not leave your work site or location until your technicians are fully trained and feel comfortable using the equipment. We will also provide your staff with additional, free, on-site training once a year to make sure you are completely satisfied with the utility locator equipment you have purchased.
In addition, we offer free on-site demonstrations of products as well as free customer support 24 hours a day, seven days a week, and free loaners when your equipment is being serviced. We offer our customers, customer service at its best.
Schedule A Free, On-Site Demo Check Out Local Training Events
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