Want to quickly verify fiber activity, polarity, and connectivity without spending thousands? Now you can for less than $200. Check out the FiberLert.

Key Features

Detects optical power in SM and MM fiber (850 to 1625 nm)
No setup or interpretation – light and sound indicate signal
“Non-contact” detector reduces risk of contamination and damage
Suitable for ports and patch cords, SM, MM, UPC and APC
LightBeat feature indicates operation and battery status

The Fluke FiberLert, 850 Nm to 1625 Nm Light Detector # FIBERLERT-125 is manufactured by Fluke. Valley Instrument Service is an authorized Fluke dealer offering full sales support, NIST-traceable calibration, and expert technical assistance.

Have questions about this product?

Our team can help with product selection, specs, pricing, and application support.

Want to quickly verify fiber activity, polarity, and connectivity without spending thousands? Now you can for less than $200. Check out the FiberLert.

Key Features

Detects optical power in SM and MM fiber (850 to 1625 nm)
No setup or interpretation – light and sound indicate signal
“Non-contact” detector reduces risk of contamination and damage
Suitable for ports and patch cords, SM, MM, UPC and APC
LightBeat feature indicates operation and battery status

Have questions about this product?

Our team can help with product selection, specs, pricing, and application support.

General	Specifications
Operating Principle	FiberLert is a live fiber detector that senses near infrared light emitted from fiber optic cabling. A continuous red glow at the handle and an audible beeping noise (if not switched off) indicates the presence of near infrared light.
Optical Interface	Non-contact ceramic ferrule. Fits directly with 1.25 mm LC receptacles. Tethered ferrule adapter for testing 1.25 mm ferrule patch cord. Supports single-mode, multimode, UPC and APC connectors and ports.
Wavelength Detection	850 nm to 1625 nm
Optical Power Detection Range	+3 dBm to -30 dBm
Light Detection	Visible steady red LED indicator when optical power is detected
Lightbeat™ Indicator	Flashes twice every two seconds when unit is on and battery strength is sufficient.
Battery Saver	Unit automatically turns off after five minutes of inactivity
Batteries	2 AAA alkaline batteries included
Battery Life	Typically, greater than 1 year (5 hrs. of use a week)
Item Size	0.6” x 1.0” x 6.6” / 1.6 x 2.5 x 16.8 cm
Item Weight	2.1 oz / 59 g
Operating Temperature Range	-10 °C to 50 °C
Operating Humidity Ranges	95 % (10 °C to 35 °C)Non-condensing 75 % (35 °C to 40 °C)Non-condensing uncontrolled < 10 °C
Operating Altitude	≤ 3000 meters
Storage Temeperature	-20 °C to 50 °C

General	Specifications
Operating Principle	FiberLert is a live fiber detector that senses near infrared light emitted from fiber optic cabling. A continuous red glow at the handle and an audible beeping noise (if not switched off) indicates the presence of near infrared light.
Optical Interface	Non-contact ceramic ferrule. Fits directly with 1.25 mm LC receptacles. Tethered ferrule adapter for testing 1.25 mm ferrule patch cord. Supports single-mode, multimode, UPC and APC connectors and ports.
Wavelength Detection	850 nm to 1625 nm
Optical Power Detection Range	+3 dBm to -30 dBm
Light Detection	Visible steady red LED indicator when optical power is detected
Lightbeat™ Indicator	Flashes twice every two seconds when unit is on and battery strength is sufficient.
Battery Saver	Unit automatically turns off after five minutes of inactivity
Batteries	2 AAA alkaline batteries included
Battery Life	Typically, greater than 1 year (5 hrs. of use a week)
Item Size	0.6” x 1.0” x 6.6” / 1.6 x 2.5 x 16.8 cm
Item Weight	2.1 oz / 59 g
Operating Temperature Range	-10 °C to 50 °C
Operating Humidity Ranges	95 % (10 °C to 35 °C)Non-condensing 75 % (35 °C to 40 °C)Non-condensing uncontrolled < 10 °C
Operating Altitude	≤ 3000 meters
Storage Temeperature	-20 °C to 50 °C

FiberLert, 850 Nm to 1625 Nm Light Detector

Key Features

Have questions about this product?

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FiberLert, 850 Nm to 1625 Nm Light Detector

Key Features

Have questions about this product?

Related Products

087724767001 TS30/120 Angl/Pin

1 GHz DSX Cable Analyzer Modules Add-on Kit

1 GHz DSX CableAnalyzer V2

1 GHz DSX Quad OLTS Insp V2, with Wi-Fi