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Internet # 202826928

Model # 21903

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10-Watt SeekTech ST-510 Underground Cable Locator Transmitter

$2,179.99
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  • Part of the SeekTech cable and pipe locating system
  • Used to generate an active signal on a metallic underground line
  • Allows the line’s location to be correctly marked
  • View More Details

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Product Details

About This Product

The RIDGID SeekTech ST-510 includes the 10-Watt line transmitter to energize metallic lines for tracing, carry handle and extendable strap for sweeps, ground spike and 2 ft. to 25 ft. of coiled lead with heavy-duty clamps. The SeekTech ST-510 locator uses 3-connection methods: Direct Connection, Induction Method with SeekTech Inductive Signal Clamp 20973 (Sold Separately), surface induction (align lines on the unit with the pipe in the ground). Buttons, LCD display, LED indicator lights and audio feedback show impedance, resistance and wattage output, speed operation and confirms a good circuit before beginning a trace. Ideal for a pipeline, water supply, cast iron or large diameter hydrants and services. The extra wattage makes your life easier. The ST-510 Line tracer works in direct connect mode with these frequencies: 128 Hz, 1 kHz, 8 kHz, 33 kHz and 93 kHz and induction method with these frequencies: 1 kHz, 8 kHz, 33 kHz, 262 kHz. The underground line locator is compatible with competitive equipment as well. on the unit to set the frequencies (1, 8, 33, 262 kHz) set induction, and control the power button and power output (low is 1/2-Watt, medium is 2-Watt and high is 5-Watt). Can simultaneously transmit 2-frequencies at one time. The transmitter is to be used with a compatible receiver such as the SeekTech SR-20 or SR-60.

Highlights

  • ST-510 underground wire locator is used to generate an active signal on a metallic underground line so that it may be traced with a compatible receiver such as the SeekTech SR-20 or SR-60
  • Underground cable locator allows the line's location to be correctly marked so it can be exposed for repair or avoided during excavation
  • Fully variable power output to maximize battery life or push the signal further down the run for better utility locating and large-diameter pipe location
  • LCD display provides instant visual feedback about line resistance, impedance and current flow keeping circuit information easy to read while underground wire locating
  • Extended range 25 ft. terminal leads can attach using the heavy-duty clips or built-in magnets and have built-in edge to scrape paint for optimal connection to pipe, ground or connection point
  • Quick and easy to use line locator with LCD display, LED light indicators and carry handle and straps for sweeping
  • Utility locator generates frequencies: direct connect - 128 Hz, 1 kHz, 8 kHz, 33 kHz, 93 kHz; Induction - 1 kHz, 8 kHz, 33 kHz, 262 kHz as well as competitor frequencies
  • Lifetime warranty: RIDGID tools are warranted to be free of defects in workmanship and material, see manufacture warranty for details
  • Return Policy

Product Information

Internet # 202826928

Model # 21903

Specifications

Compatible Pipe Size (in.): 1 in.,1/2 in.,2 in.,4 in.,48 in.,6 in.

Dimensions

Compatible Pipe Size (in.)

1 in.,1/2 in.,2 in.,4 in.,48 in.,6 in.

Details

Pack Size

1

Power Type

Battery

Product Type

Transmitter

Product Weight (lb.)

8 lb

Returnable

90-Day

Warranty / Certifications

Manufacturer Warranty

Limited Lifetime Warranty

Questions & Answers

Does the ST-510 detect plastic gas/water lines underground?
BySep 23, 2025
1 Answer | 
Answer This Question

You can only energize metallic lines with the transmitter.

By|Sep 24, 2025


    THE TRANSMITTER MUST BE PURCHASED WITH A LOCATOR CORRECT?
    BySep 16, 2025
    1 Answer | 
    Answer This Question

    Yes, You will need a locator to trace the signal supplied by the line transmitter.

    By|Sep 18, 2025


      Will this work with the SR-20 locater 
      ByAug 18, 2025
      1 Answer | 
      Answer This Question

      YES. Any transmitter that pushes a signal that the receiver can receive or detect is compatible. I have tested it with the these models and they work and are compatible. Only draw back is you have to use D batteries or plug in transmitter.

      By|Aug 18, 2025


        I wonder if st-510 could detect deeper pipes between st-305 and st-510 with sr-20? Or sr-20 can detect the same depth whether i use st-510 or st305?   How deep can st-305 help to detect and how deep can st-510 detect?Since st-510 has 2times stronger watts
        ByJun 13, 2025
        1 Answer | 
        Answer This Question

        Depth capabilities are determined by the jobsite, not by the locator or the line transmitter. The soil content, size of the conductor and quality of the conductor are the limiting factors when it comes to maximum depth capacity. Increasing the wattage can improve your tracing signal clarity and. However, this feature doesn't necessarily translate to greater depths.

        By|Jun 13, 2025


          How much for the unit. Does it come with locator?
          ByNov 21, 2024
          1 Answer | 
          Answer This Question

          The locator is sold separately. To get pricing please click the link below to find your nearest distributor for pricing. https://www.ridgid.com/us/en/where-to-buy

          By|Nov 22, 2024


            Will this work with the rigid Navi track scout
            BySep 11, 2019
            1 Answer | 
            Answer This Question

            No, this will not work with the Rigid Navi Track Scout.

            By|Sep 19, 2019


              Also bottom centre of key pad High Voltage Light, what does that indicate? thanks. Aaron
              ByNov 30, 2014
              1 Answer | 
              Answer This Question

              This would indicate the output voltage that has been generated by the unit and applied to the target utility. The High Voltage LED will appear if the unit detects the presence of high voltage, use “high voltage precautions” to carefully disconnect the line transmitter from the high voltage source.

              By|Apr 22, 2024


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                Customer Reviews

                3 out of 5

                • 3 out of 2 reviews
                • 0% recommend this product
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                Showing 1-2 of 2 reviews
                Induction mode is excellent
                I've been using the Ridgid locator equipment for years and the ST510 transmitter works flawlessly with the SR-20 and SR-24 Locators
                by
                  Once again for the record I didn’t order this item....
                  Once again for the record I didn’t order this item. Your company allowed someone to purchase this product under my name this is literally identity theft
                  by
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                  Showing 1-2 of 2 reviews

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                  Product Snapshot

                  Ideal for locating underground utilities with variable power output, LCD display, and extended range leads. Ensures accurate and efficient pipe location.
                  Built for professionals: 5-Watt transmitter with 4 frequencies, ensuring precise line tracing.
                  Ideal for locating underground utilities and sondes with multi-directional locating and depth calculation. Ensures accurate locates with micro-mapping display.
                  Built for professionals: The SeeSnake CSx Via System offers superior inspection images and long-lasting performance with 18V lithium batteries.

                  Depth Measurement Capability

                  Multi-Directional Locating

                  Water-Resistant

                  Digital Display

                  Tracer Wire Compatibility