Megger TDR 900 Handheld Time Domain Reflectometer/Cable LEngth Meter 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 east 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). **Typical applications: CE-Certificated Accurate to 20 inches (50 cm) throughout the entire range Extra-large backlit (ICON type 7 segment) LCD Automatic output impedance control, auto-range, autozero