ExFo FLS-140
ExFo FLS-140
ExFo FLS-140
ExFo FLS-140
ExFo FLS-140
ExFo FLS-140
ExFo FLS-140
ExFo FLS-140

ExFo FLS-140 Visual Fault Locator | Pocket-Sized Fiber Optic Cable Tester with 655 nm Red Laser, 5 km Range, Dual Mode, Long Battery Life

SAR1,300.00 SAR1,500.00
  • Fast Fault Detection: Bright 655 nm red laser pinpoints breaks, bends, and connector issues.
  • Dual Mode Operation: Switch between continuous wave (CW) and pulsed mode for flexible testing.
  • Long-Lasting Battery: Enjoy up to 40 hours of uninterrupted use with two standard AAA batteries.
  • Compact & Lightweight: Pen-style, pocket-sized design with a tough anodized aluminum body — built for portability and durability.
  • 2.5 mm Universal Connector: Compatible with most standard fiber optic connectors.
  • 5 km Reach: Identify fibers from end to end and locate faults over long distances.*
  • Budget-Friendly Performance: Affordable, high-efficiency tool — ideal for every fiber tech’s toolkit.

    *Range varies depending on fiber type, attenuation, and ambient light conditions.
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Product Details
The FLS-140 Visual Fault Locator is the essential fiber optic tool for technicians needing fast, reliable fault detection. This pocket-sized, pen-style device emits a bright 655 nm red laser, helping you quickly identify breaks, bends, or faulty connectors in both singlemode and multimode fibers. With dual operation modes (continuous wave and pulsed), a 2.5 mm universal connector, and up to 40 hours of battery life on standard AAA batteries, the FLS-140 delivers powerful performance in a lightweight, durable aluminum body — all at an affordable price.


  • Specifications are valid at 23 °C ± 3 °C.
  • Only valid with 50/125 µm fiber.
  • Depends on fiber attenuation.
  • Typical battery life using AAA alkaline batteries: VARTA Industrial No. 4003; 1.5 V; LR03 Micro; AM4; MN2400.
  • Battery life may fluctuate significantly, depending on the specific unit’s laser current.
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