Klein Tools 501915 TDR Cable Length Meter 3000 Feet Fault Finder (Distance to Fault Detection, Romex Data Coax Compatibility, Electrical Diagnostics)

Locate Wire Faults And Measure Spool Inventory Instantly With Precision TDR Technology

The Klein Tools 501915 is a portable diagnostic wire meter engineered for precision cable length measurement and distance-to-fault tracking on copper wiring systems up to 3,000 feet. Utilizing Time Domain Reflectometry (TDR) technology, this handheld device instantly calculates distances to open or short circuits in buried or hidden runs. Its built-in velocity of propagation adjustment and interactive color screen deliver fast diagnostics across multi-conductor electrical, communication, and coaxial lines.

Best Used For:

• Distance-to-Fault Tracking: Pinpointing the exact foot location of short circuits and open breaks inside finished walls or underground conduits.
• Spool Inventory Management: Rapidly measuring remaining electrical wire, data strands, or coaxial cables left on bulk storage drums.
• Pre-Installation Mapping: Verifying total path length and structural wire runs across commercial network infrastructure and residential framing layouts.

Key Performance & Safety Features

• Advanced TDR Technology: Precision system sends signals down the conductor path to isolate circuit faults and measure lengths without manual physical tracing.
• Velocity of Propagation Adjustment: Tunable settings from 20.0% to 99.9% allow calibrations matching specific line properties for maximum accuracy.
• Interactive Color Display: Backlit LCD provides crisp, high-visibility data layouts when troubleshooting inside dark electrical panels or mechanical rooms.
• Universal Cable Interface: Outfitted with interchangeable modular connection options including RJ45 ports, BNC terminals, and heavy-duty alligator clips.
• Integrated Tone Generator: Emits multiple audio tracing frequencies to simplify individual line identification across bundle paths.
• Jobsite Durability Rating: Engineered with a shock-absorbing housing that withstands standard 6.6-foot drops onto concrete surfaces.

What's Included

• Klein Tools 501915 TDR Cable Length Meter
• Premium Test Lead Set (Alligator Clips, BNC Connector, RJ45 Interface)
• Two AA Alkaline Batteries
• Padded Zippered Carrying Case

Technical Specifications

Pro-Tip: For absolute pinpoint precision when testing an unknown wire brand, cut a known 10-foot sample length of that exact cable type, measure it with the 501915, and adjust the VoP percentage until the screen registers exactly 10 feet before testing your hidden runs.