TDR Cable Length Meter


  • Cable length meter measures length of electrical, data, two-wire and Romex® cables up to 3000 feet (914 m)
  • TDR technology measures Distance-to-Fault, Open or Short, 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-Percent plus 3-Foot/0.9 m) 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 (requires Analog Probe (Cat. No. VDV500-123, sold separately)
  • Coax-BNC or high quality alligator clips for quick, easy connection to test most cable types
  • RJ45 jack for accurate length measurement of terminated data cables
  • Measurements can be switched between and metric and imperial units
  • Includes padded carrying case and leads
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The Klein Tools Cable Length Meter is a portable Time Domain Reflectometry (TDR) cable length tester. It measures cable length, calibrates Velocity of Propagation (VoP) values, finds distance to faults in cables, and provides built-in tone generation for cable tracing. This tester provides accurate cable length measurement for a wide variety of cable types at an affordable price. Includes test leads and a carrying case.

Cable Meter
Cable Length Measurement
Special Features:
Velocity of Propagation Range: 20 to 99.9%
Cable Type:
Coaxial, Data, Electrical
Overall Length:
2.7'' (6.9 cm)
Overall Height:
6.2'' (15.7 cm)
Overall Width:
1.4'' (3.6 cm)
ABS Plastic
2 × AA Alkaline
Battery Life:
Active: Approx 15 hr; Standby: Approx 3 yr.
Drop Protection:
6.6' (2 m)
Connection & Adapter Types:
Alligator clips, Female Coax-F, Male Coax-F, RJ45, BNC
Backlit LCD
Multiple Style Tone Generator:
Two Tones
Faults Detected:
Distance-to-Fault, Open or Short
Test & Measure Types:
Length, Distance-to-Fault
TDR Cable Length Meter, Batteries, Test Leads, Carrying Pouch
7.6 oz (215 g) without batteries
Additional Information
  • The Cable Length Meter should NOT be used on energized cabling systems.
  • Internal components of the Cable Length Meter are protected up to 30V peak AC or DC. Connecting the meter to voltages above this range may pose a safety hazard to the user and the meter.