A studio kit view of the Klein Tools 501915 TDR Cable Length Meter. The yellow and black digital tester is shown alongside its professional accessory kit, which includes high-quality alligator clip leads, BNC-to-coax adapters, and an RJ45 jumper cable for comprehensive cable length testing and fault location.
Product feature infographic for the 501915 TDR meter highlighting its core capabilities. The text emphasizes that the tool uses advanced Time Domain Reflectometry (TDR) technology to measure cable length, locate open and short faults, and test most copper cable types including data, voice, video, electrical, and speaker wire.
A detailed layout of the Klein Tools 501915 kit components. This image confirms the inclusion of the TDR cable length meter, male Coax-BNC to alligator clips, male Coax-BNC to female Coax-F, male Coax-BNC to male Coax-F, CAT6 RJ45 jumper, and male Coax-BNC to male Coax-BNC adapters for maximum jobsite versatility.
Action shot of a technician using the 501915 meter to measure a specific wire run. The high-resolution color LCD screen displays a clear length reading of 255.2 feet, illustrating the precision of Time Domain Reflectometry technology when used for professional electrical diagnostics.
Close-up view of the 501915 meter with a BNC-to-coax adapter connected to the top port. The interface shows the "CAT4UT" cable profile selected with a VoP of 68.3%, demonstrating the tool's specialized mapping for twisted-pair data cables.
Close-up view of the Klein Tools TDR meter featuring a professional RJ45 data cable connection. This image highlights the dedicated data port used for measuring the length of terminated Ethernet cables and identifying distance-to-fault on network infrastructure.
Detailed view of the 501915 tactile keypad and interactive color display. The ergonomic button layout includes dedicated keys for Type, Library, and Home navigation, allowing technicians to quickly access pre-programmed Velocity of Propagation (VoP) values for accurate wire measurement.
Action shot showing the 501915 meter connected to a standard RJ45 wall jack using an Ethernet patch cable. The device is shown in "Data Tone" mode, illustrating its dual-functionality as both a length meter and a high-performance tone generator for wire tracing.
Action shot of the Klein Tools 501915 measuring a large spool of CAT6A cable. The technician uses the heavy-duty alligator clips to connect to the wire pairs, while the meter displays a real-time length measurement of 343.0 feet, facilitating efficient inventory management.
Action shot of a professional measuring a bulk spool of RG6 coaxial cable using the 501915 TDR meter. The device displays a length of 346.5 feet, demonstrating how the Time Domain Reflectometry technology provides instant verification of remaining cable on industrial spools.
Action shot of a professional technician using the 501915 TDR meter to measure the length of a high-fidelity speaker wire. The color LCD display shows a precise distance reading of 255.2 feet, illustrating the tool's effectiveness for residential and commercial audio-visual wire management.
Action shot of the Klein Tools cable length meter being used to measure a coil of white 14/2 Romex electrical wire. The technician is shown using the heavy-duty alligator clips to connect to the copper conductors, with the meter displaying a real-time length measurement of 48.2 feet.
Action shot demonstrating a direct connection to a bulk spool of CAT6A data cable using the 501915 TDR meter. The technician is shown plugging a terminated Ethernet cable directly into the meter's RJ45 port to verify the total length of 343.0 feet remaining on the industrial spool.
Action shot of the 501915 cable meter measuring an unterminated spool of blue CAT6A data cable. The image highlights the use of the professional alligator clip adapters to interface with the individual twisted pairs, providing an accurate length reading of 343.1 feet for inventory verification.
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A studio kit view of the Klein Tools 501915 TDR Cable Length Meter. The yellow and black digital tester is shown alongside its professional accessory kit, which includes high-quality alligator clip leads, BNC-to-coax adapters, and an RJ45 jumper cable for comprehensive cable length testing and fault location.
Product feature infographic for the 501915 TDR meter highlighting its core capabilities. The text emphasizes that the tool uses advanced Time Domain Reflectometry (TDR) technology to measure cable length, locate open and short faults, and test most copper cable types including data, voice, video, electrical, and speaker wire.
A detailed layout of the Klein Tools 501915 kit components. This image confirms the inclusion of the TDR cable length meter, male Coax-BNC to alligator clips, male Coax-BNC to female Coax-F, male Coax-BNC to male Coax-F, CAT6 RJ45 jumper, and male Coax-BNC to male Coax-BNC adapters for maximum jobsite versatility.
Action shot of a technician using the 501915 meter to measure a specific wire run. The high-resolution color LCD screen displays a clear length reading of 255.2 feet, illustrating the precision of Time Domain Reflectometry technology when used for professional electrical diagnostics.
Close-up view of the 501915 meter with a BNC-to-coax adapter connected to the top port. The interface shows the "CAT4UT" cable profile selected with a VoP of 68.3%, demonstrating the tool's specialized mapping for twisted-pair data cables.
Close-up view of the Klein Tools TDR meter featuring a professional RJ45 data cable connection. This image highlights the dedicated data port used for measuring the length of terminated Ethernet cables and identifying distance-to-fault on network infrastructure.
Detailed view of the 501915 tactile keypad and interactive color display. The ergonomic button layout includes dedicated keys for Type, Library, and Home navigation, allowing technicians to quickly access pre-programmed Velocity of Propagation (VoP) values for accurate wire measurement.
Action shot showing the 501915 meter connected to a standard RJ45 wall jack using an Ethernet patch cable. The device is shown in "Data Tone" mode, illustrating its dual-functionality as both a length meter and a high-performance tone generator for wire tracing.
Action shot of the Klein Tools 501915 measuring a large spool of CAT6A cable. The technician uses the heavy-duty alligator clips to connect to the wire pairs, while the meter displays a real-time length measurement of 343.0 feet, facilitating efficient inventory management.
Action shot of a professional measuring a bulk spool of RG6 coaxial cable using the 501915 TDR meter. The device displays a length of 346.5 feet, demonstrating how the Time Domain Reflectometry technology provides instant verification of remaining cable on industrial spools.
Action shot of a professional technician using the 501915 TDR meter to measure the length of a high-fidelity speaker wire. The color LCD display shows a precise distance reading of 255.2 feet, illustrating the tool's effectiveness for residential and commercial audio-visual wire management.
Action shot of the Klein Tools cable length meter being used to measure a coil of white 14/2 Romex electrical wire. The technician is shown using the heavy-duty alligator clips to connect to the copper conductors, with the meter displaying a real-time length measurement of 48.2 feet.
Action shot demonstrating a direct connection to a bulk spool of CAT6A data cable using the 501915 TDR meter. The technician is shown plugging a terminated Ethernet cable directly into the meter's RJ45 port to verify the total length of 343.0 feet remaining on the industrial spool.
Action shot of the 501915 cable meter measuring an unterminated spool of blue CAT6A data cable. The image highlights the use of the professional alligator clip adapters to interface with the individual twisted pairs, providing an accurate length reading of 343.1 feet for inventory verification.
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KLEIN TOOLS

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

Only 1 left
SKU: 501915
$199.99 USD

Description

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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

Maximum Measurement Range: 3,000 ft.
Diagnostic Technology: Time Domain Reflectometry (TDR)
Velocity of Propagation Range: 20.0% - 99.9%
Cable Compatibility: Coaxial, Data, Electrical, Romex
Fault Types Identified: Distance-to-Fault, Open Circuits, Short Circuits
Drop Protection: 6.6 ft.
Power Source: 2 x AA Alkaline Batteries
Display Interface: Backlit Interactive Color LCD
Dimensions: 6.2 in. x 2.7 in.
Tool Weight: 7.6 oz.
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.