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  • Ten watts of fully variable power output
  • LCD display provides instant visual feedback on line resistance and current flow
  • Two 25' (7,62 m) lead wires with heavy duty clips
  • Audio feedback confirms a good circuit before beginning a trace



Direct Connect 128 Hz, 1 kHz, 8 kHz, 33 kHz and 93 kHz.
Induction 1 kHz, 8 kHz, 33 kHz, 262 kHz.*
Competitor Frequencies Available in both direct connect and induction.
*Up to 93 kHz for devices sold in Europe.

Ordering Information

Catalog Number Description Weight
lb. kg
21903 SeekTech ST-510 Transmitter (10 watts)  3.4 
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The St-510 reads 27V, top left, what is this reading as the unit is only 12V

Also bottom centre of key pad High Voltage Light, what does that indicate? thanks. Aaron
Asked by: ABGH
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.
Answered by: RIDGIDSupport
Date published: 2017-09-06
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