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 Portable Distance to Fault Finder for Coax Data Electrical and Romex Wire Measurement up to 3000 Feet Pair

Only 1 left
SKU: 501915
$199.99 USD

Description

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Precision Cable Diagnostics: Master Length Measurement and Fault Location with Advanced TDR Technology

The Klein Tools 501915 TDR Cable Length Meter is an essential diagnostic power-tool for electricians, data installers, and maintenance professionals who require absolute accuracy in wire management. Utilizing professional-grade Time Domain Reflectometry (TDR) technology, this portable meter measures the length of electrical, data, and two-wire cables up to an impressive 3,000 feet. Whether you are checking remaining inventory on a spool or verifying a run inside a wall, this meter provides highly accurate results for both terminated and unterminated cables, including specialized Romex® and coaxial lines.

Beyond simple length measurement, the 501915 excels at advanced troubleshooting by pinpointing the Distance-to-Fault. Instantly identify the exact location of opens or shorts, saving hours of manual tracing and unnecessary demolition. The full-color, interactive LCD interface allows you to easily calibrate and store custom Velocity of Propagation (VoP) values for specific cable brands, ensuring consistent accuracy across different materials. With built-in tone generation for wire tracing and a rugged design capable of withstanding a 6.6-foot drop, this meter is built to handle the most demanding jobsite environments.

Key Features

  • High-Reach Measurement: Accurately measures electrical, data, and multi-wire cables up to 3,000 feet.
  • Advanced TDR Technology: Precision Distance-to-Fault detection for opens and shorts on any wire path.
  • VoP Calibration: Pre-programmed and customizable Velocity of Propagation values for superior accuracy.
  • Interactive Color Display: Backlit LCD provides easy-to-read data in dark or poorly lit mechanical rooms.
  • Universal Connectivity: Includes RJ45, BNC, and high-quality alligator clips for versatile cable interfacing.
  • Tone Generation: Built-in tones for wire tracing (requires Analog Probe Cat. No. VDV500-123, sold separately).
  • Professional Durability: Rugged ABS plastic construction with 6.6-foot (2 m) drop protection.

What's Included

  • (1) 501915 TDR Cable Length Meter
  • (1) Set of Test Leads (Alligator Clips, BNC, RJ45)
  • (2) AA Alkaline Batteries
  • (1) Padded Carrying Case

Specifications

Measurement Range Up to 3,000 Feet
Technology Time Domain Reflectometry (TDR)
VoP Range 20.0% to 99.9%
Cable Compatibility Coaxial, Data, Electrical, Romex®
Faults Detected Distance-to-Fault, Open, Short
Drop Protection 6.6 Feet (2 m)
Batteries 2 x AA Alkaline (Included)
Display Backlit Interactive Color LCD
Overall Length 6.2 Inches
Overall Width 2.7 Inches
Weight 7.6 oz
UPC 092644583858

Pro-Tip: To ensure the highest accuracy when using TDR, always calibrate your meter using a known length of the same cable type you are about to test. This helps account for manufacturer variations in Velocity of Propagation (VoP), ensuring your distance-to-fault measurements are precise to the inch.