Uni-T UT691-10 Visual Fiber Optic Fault Locator

Uni-T UT691-10 is a compact visual fault locator for fast fiber-optic diagnostics. It features red laser light 650 ±10 nm, output power ≥10 mW, a range of up to 8–10 km, two illumination modes (continuous/pulsed), and a rugged IP54 design for field work.

High-power laser for longer fiber runs

Output power ≥10 mW and a 8–10 km range make it easier to find faults on longer routes. The 650 ±10 nm red light is clearly visible for quick orientation during diagnostics.

Rugged design for field use

Rugged construction with IP54 protection and 1 m drop resistance helps handle everyday service work even in harsher conditions.

Compact, lightweight, and service-ready

Low weight of 62 g, dimensions 130 × 38 × 27 mm, a rechargeable 3.7 V / 1050 mAh battery, a LED flashlight, and automatic shutoff after 15 minutes make the UT691-10 a practical tool for everyday use.

Uni-T UT691-10 visual fault locator is a practical tool for detecting damage in fiber-optic routes, identifying fibers, and routine maintenance of fiber installations. Thanks to the visible red laser, you can easily spot breaks, micro-bends, or poor terminations—quickly and without unnecessary delays.

The UT691-10 model offers higher laser power (≥10 mW) and therefore a longer range for fault location. The universal 2.5 mm (FC) connector together with continuous and pulsed modes makes everyday diagnostics easier in service practice.

For field work, you’ll appreciate the compact dimensions, low weight, and durability. An integrated LED flashlight, battery status indicator, and automatic shutoff after 15 minutes help increase comfort and safety during use.