Sell Test Equipment

TDR900 Megger Hand-held TDR Cable Length Meter

The TDR900 hand-held cable length meter is from Megger.

Additional Features:

  • Full autoranging for measuring the length of pow er, telephony, CATV and LAN cables, provides distance to an open or short.
  • Extra large, high resolution backlit LCD.
  • Automatic output impedance control of 25, 50, 75, 100, 125 or 150 ohms.
  • User-friendly menu on screen operation.
  • Cable length calibration function.
  • Internal library of 39 standard cable types.


  • Alligator clip adapter
  • User manual
  • Soft carrying case



  • Installation and Repair technicians desire a portable test set for testing service drops and inside wiring during trouble ticket dispatches. The TDR900 connects to service drops or inside wiring and determines single or multiple cases of trouble to the customers’ services. The Meter detects and displays cable issues, which do not meet the provider’s facility criteria during the maintenance process. The TDR900 displays test results including: open, short, voltage detection and distance to fault in feet (meters). A tone generator is also built into the Meter for pair identification and tracing.


  • The TDR900 fills various applications ranging from cable verification and fault location, panel mapping to cable stock control. The Meter supports either electrical contractors or telecom/datacom contractors. Contractors can verify cable lengths on buried service drops before billing service providers.

The Megger TDR900 is an advanced instrument capable of measuring cable lengths and finding distance to an open or a short using Time Domain Reflectometry. It offers exceptional features and a range capability normally associated with far more expensive instruments. The measurement range spans from 15 feet (5 m) to 10,000 feet (3 km) with a minimum resolution of 20 inches (50 cm). The TDR900 can be used for any cable consisting of at least two insulated metallic elements, one of which may be the sheath or shield of the cable. The Meter has automatic internal matching networks to allow testing of 25?, 50?, 75?, 100?, 125?, or 150? cables. (These correspond to power, telephony, CATV, and LAN cables.)

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