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  • Target line and guidance arrows quickly identify distortion.
  • Proximity signal and signal strength help work through difficult locates.
  • Trace any frequency from 10 Hz to 35 kHz.


Active Line Trace Frequencies * 128 Hz, 1 kHz, 8 kHz and 33 kHz.
Passive Power Trace 50 Hz, 60 Hz, <4 kHz Broadband.
Passive Radio Trace 4 kHz-15 kHz, 15 kHz-36 kHz.
Sonde Frequencies * 16 Hz, 512 Hz, 640 Hz, 850 Hz, 8 kHz, 16 kHz, 33 kHz.
Power Source 4 C-Cell batteries.
Battery Life Approximately 16 hours.
Weight 3.5 lbs. (1.6 kg).
Meets FCC Class A and EN 55022 Class A requirements.
* 30 user definable frequencies can be set from 10 Hz to 35 kHz.

Support Documents

Catalog Sheet

Ordering Information

Catalog Number Description Weight
lb. kg
21893 SeekTech SR-20 Line Locator  4.0  1.8  Buy Now
  • Navitrack Mark Chips, Pkg of 3
  • 22173 - SR-20/SR-24 Case
46918 KIT: SR-20 + ST305 + 4” CLAMP  8.5  3.8  Buy Now
Catalog Number Description Weight
lb. kg
20973 SeekTech 4” (100 mm) Inductive Signal Clamp  2.00  0.90  Buy Now
21898 SeekTech ST-305 Transmitter  2.50  1.90  Buy Now
Replacement Parts
Catalog Number Description Weight
lb. kg
22173 SR-20/SR-24 Case  2.2  Buy Now
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calibration SeekTech SR-20

Dear Sirs We would like to know what is procedure used to calibrate that equipment , or , if OSHA 18000 has some inidcation or rule to calibrate that . Waiting your commnets JEsus Rubio
Asked by: JRUBIO
Typically calibration only needs to be done on a unit when and if the mast assembly has been dis assembled due to damage and or repairs. Calibration can only be performed at the factory. I am not familiar with OSHA 18000 or of it has any mandate on when locating tools are calibrated. If you have further questions please contact our Technical Support Department at 888-743-4333. Thank you RIDGID
Answered by: RIDGID
Date published: 2014-05-31

What could be the ideal values of Signal Strength, Proximity Signal and Current strength of a very good locate

I had an interaction with Telecom professionals who works on laying and management of telecom OFC cables (with in built tracer lines). They had used different locators before but due to the shortcomings have upgraded to RIDGID locators. The concept of multiple ways of confirming a signal thru Signal strength, Proximity Signal and interactive trace lines were well appreciated. But they thought it would be ideal, if RIDGID can give reference values for Current strength, Signal strength and Proximity Signal which will indicate a strong locate or signal. These Reference values (in a range) can serve as a benchmark for strong locate or signal along with the current set of indicators.
Asked by: RIDGIDind
One of the biggest advantages of the Seek Tech locating equipment is its ability to identify / trace a target utility with four different key indicators. What makes them all unique is the way they are calculated. Each indicator is calculated by using a different combination of antennas or calculations based on multiple readings. What this does in a sense is give the locator the built in &ldquo;second, third and even fourth&rdquo; opinion as to the location of the target utility. The problem with stating a certain utility should be within a certain range is that there are too many variables that the locator cannot control. The type and quality of the conductor, the soil conditions, and any interference in the immediate area can all affect the quality of a locate. What one should be looking for is the agreement of these indicators rather than a specified range for each on an individual basis. If I can get my balance arrows, my trace line, signal strength and proximity to all agree on a specific location I have the highest degree of confidence that I have made a good locate. The fewer indicators that I have in agreement, the more distortion that is present and this is an indicator that I need to change some of the things I can control, like improving my ground or changing my frequency.
Answered by: RIDGIDSupport
Date published: 2015-05-21
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