Fiber Optic Laser Tester TriBrer BML-209-20 650 nm 20 mW for up to 10 km

TriBrer BML-209-20 is a handheld fiber optic laser tester that emits visible red light at 650 nm with an output power of 20 mW. Designed for installers and maintenance technicians, this compact tester provides a stable, focused beam suitable for continuity checks, tracer tasks and locating faults on both single-mode and multimode fiber links with reach up to 10 km. The device assists in identifying individual fibers in bundles, verifying end-to-end connections and detecting breaks or high-loss points during installation and service operations.

Advantages

The TriBrer BML-209-20 delivers a consistent 20 mW visible laser output at 650 nm, offering clear visual feedback for fiber continuity and tracing without relying on complex setups. Its handheld form factor and rugged construction make it convenient for field use and site visits. The visible wavelength simplifies fiber identification in patch panels and fiber trays, while the power level supports testing over extended distances up to 10 km under appropriate conditions.

Suitable for

• Continuity checks on single-mode and multimode fiber runs
• Tracing and identifying fibers in bundles, patch panels and splice trays
• Locating breaks, bends or high-loss points during installation and maintenance
• Quick verification of end-to-end connections during commissioning

Key specifications

• Wavelength: 650 nm (visible red)
• Output power: 20 mW
• Effective testing range: up to 10 km (dependent on fiber type and link loss)
• Operation: handheld, single-beam laser source
• Compatibility: suitable for single-mode and multimode fibers for visual tracing

How to use

Connect the TriBrer BML-209-20 to the fiber under test using the appropriate adapter or by directly coupling into the fiber endface. Power the unit on and align the beam with the fiber path; observe the visible red light at the far end or along the cable route to confirm continuity or locate faults. For bundle tracing, sequentially test individual fibers to identify the illuminated strand. Turn the device off after testing and store it in a protective case to prevent damage to the laser aperture.

Usage recommendations

When using the laser tester, avoid direct eye exposure to the beam and follow local laser safety guidelines. Use proper fiber endface cleaning and appropriate adapters to ensure reliable coupling. For long links near the stated maximum range, consider link loss and connector/splice attenuation to interpret visible light intensity correctly.