The Triplett TDR100 Precision Cable Length Tester uses TDR (Time Domain Reflectometer) technology to measure cable length. It can be used for any cable consisting of at least 2 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 with automatic selection range, which correspond to power, telephony, CAT V, LAN, etc. cables. The meter can be closely matched with the cable under test using the function selection keys. The velocity of propagation value (V.O.P.) can be similarly adjusted to match the cable under test, ensuring an accurate distance measurement.

The TDR100 Tester features a 2.4 in. TFT color display with an easy-to-use onscreen menu, 20 built-in groups of standard cable V.O.P. (velocity of propagation) values, and 99 memory locations store traces for future analysis. An Auto-Sensitivity function provides a closer match to a wide range of cables with only the V.O.P. settings required.