Klein Tools TDR Cable Length Meter 501-915

A new Klein Tools TDR Cable Length Meter 501-915 has been announced. It gives you the ability to measure the length of various types of cables.

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Klein Tools TDR Cable Length Meter 501-915 – Features

Klein TDR Cable Length Meter 501-915 in action

This cable length meter can measure the length of electrical, data, two wire, and Romex cables up to 3,000 ft (914m). It does so using TDR technology which stands for Time Domain Reflectory. This tech can measure distance to fault, open or shot, on terminated or unterminated cables.



These length meters come programmed with (VoP) Velocity of Propagation values to measure cables with up to 2%+3′ of accuracy. At a thousand feet, that’s an accuracy of up to 23 feet more or less – if my calculations are correct. That means that you’re getting very close rough estimates at long distances. However the user will have to account for some degree of error.

Klein TDR Cable Length Meter 501-915

It uses a color display as shown above. It also offers the ability to tone unenergized, open ended wires for wire tracing. Provided with the tool are coax-BNC or alligator clips so you are able to test most types of cables out of the box. A built in RJ45 jack offers quick measurements of already terminated data cables.

Price & What’s Included

It comes with a padded carry case, batteries, and test leads and is priced at $199.99.

  • Cable length meter measures the length of electrical, data, two-wire and Romex® cables up to 3,000-ft (914 m)
  • TDR technology measures distance-to-fault, open or shot, on terminated or unterminated cable
  • Programmed with Velocity of Propagation (VoP) values for Coax, Data, Romex® and other multiwire cables for accurate length measurement within +/-(2% +3’) accuracy
  • Stores custom cable VoP values for consistently accurate results and time savings
  • Simple interface with full color, interactive LCD
  • Tones unenergized, open-ended wires for wire tracing* *Analog tracing probe required, sold separately, Cat. No. VDV500-123 recommended
  • Coax-BNC or alligator clips for a quick and easy connection to test most cable types
  • RJ45 jack for accurate length measurement of terminated data cables
  • Measurements can be switched between metric and imperial units
  • Included padded carrying case and leads


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