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VFL — Visual Fault Locator
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VFL — Visual Fault Locator

Visual fault locator for pinpointing fiber breaks, bends and faults.

The BML209 is a compact pen-style 650 nm Visual Fault Locator (VFL) that detects fiber faults, breaks, bends, and connector defects, with 1–30 mW output options for 3 km to 10+ km testing.
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Technical Specifications

Output Power>1 mW / >10 mW / >20 mW / >30 mW
Dynamic Distance3 to 5 km / 8 to 10 km / >10 km / >10 km
Wavelength650 nm ±20 nm
Operation ModesContinuous Wave (CW) and Pulsed (2 Hz)
Connector2.5 mm Universal adapter
Dimensions180 mm (L) × 30 mm (diameter)
Weight46 g

Key Features

  • 650 nm ±20 nm visible red laser for instant fault and break localisation
  • Four output power variants: 1 mW, 10 mW, 20 mW, and 30 mW for different reach requirements
  • Dynamic detection distance: 3 to 5 km (1 mW) up to >10 km (20/30 mW variants)
  • Dual operation modes: Continuous Wave (CW) and Pulsed (2 Hz) for identification
  • 2.5 mm universal adapter connector; optional 1.25 mm adapter available
  • Detects faults in connectors, splices, bends, breaks, and fiber splitter points

Applications & Use Cases

  • Telecommunications network infrastructure & FTTH/FTTX deployments
  • Enterprise data centres, high-density optical routing, and campus LANs
  • Broadband CATV networks and carrier-grade fiber backhaul