Fluke Networks FiberLert Fiber Detector

FiberLert™ Live Fiber Detector

The easy, pocket-sized fiber troubleshooter




Product Highlights Detects active fiber signals for testing ports, cables and polarity.

• Detects optical power in single-mode and multimode fiber wavelengths (near infrared range 850 nm to 1625 nm)

• No setup or interpretation needed – light and sound indicate presence of an optical signal

• “Non contact” detector reduces the risk of contamination and damage

• Suitable for ports and patch cords, SM, MM, UPC and APC connections

• LightBeat™ flashes to indicate operation and battery status; powers off after five minutes of inactivity to preserve battery life (2xAAA, included)

• Two-year warranty


Quickly verify fiber activity, polarity, and connectivity with the FiberLert™ Live Fiber Detector. Just place in front of the fiber end face or port and a light and tone indicate an active fiber (850 nm to 1625 nm) - no setup or interpretation required. This pocket-sized tool tests single-mode, multimode, UPC and APC patch cords and ports with a non-contact / non-contaminating detector. The LightBeat™ feature flashes the LED, indicating a powered-on condition and good battery, a timer shuts FiberLert™ off after five minutes of inactivity to extend battery life (2xAAA, included). Rugged design includes a convenient pocket clip and is backed by a two-year warranty.




Applications Check polarity and operation of patch cords.


Determine if a port is live. Small size makes it easy to access cramped patch panels.


Determine if a transceiver is operational. FiberLert can detect fiber signals without making contact




Full specification and details can be found in the Product Datasheet PDF file