FLUKE NETWORKS FiberLert | Non-Contact Fiber Optic Signal Tester
The Fluke FiberLert™ is a handheld, non-contact fiber optic live fiber detector designed to quickly identify the presence of optical signals in fiber cables without disconnecting or disrupting network traffic. Built for fiber technicians, network engineers, and data center professionals, FiberLert helps reduce troubleshooting time and prevents accidental service interruptions by providing instant verification of active fiber links. It is suitable for enterprise networks, telecom environments, data centers, and FTTH installations.
Key Features:
Non-Contact Signal Detection:
- Detects live optical signals without disconnecting fibers or opening network connections.
Fast Active Fiber Identification:
- Quickly determines whether a fiber is carrying traffic, helping technicians avoid accidental outages.
Safe Troubleshooting:
- Minimizes the risk of interrupting critical network services during maintenance and testing.
Simple One-Button Operation:
- Intuitive design allows users to begin testing immediately with minimal training.
Portable & Rugged Construction:
- Compact handheld form factor designed for field service, telecom, and data center environments.
Supports Common Fiber Types:
- Compatible with widely deployed single-mode and multimode fiber installations.
Battery-Powered Convenience:
- Ideal for mobile technicians performing on-site inspections and network maintenance.
Technical Specifications:
Specification
Detail
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 °COperating Altitude
≤ 3000 meters
Storage Temeperature
-20 °C to 50 °C
Applications:
- Data center fiber troubleshooting
- Live fiber identification before maintenance
- Enterprise network diagnostics
- Telecom network testing and verification
- FTTH (Fiber-to-the-Home) installation and servicing
- Fiber patch panel inspection
- Cable tracing and documentation
- MAC (Move, Add, Change) activities in fiber networks
- Preventing accidental disconnection of active links
- Network outage prevention during fiber maintenance
- Verification of active vs. inactive fiber ports
- Fiber infrastructure audits and inventory management
- Field service and network commissioning
- Optical network maintenance in campus and industrial environments
How to Use:
- Place the detector in front of the fiber end face or optical port.
- The device automatically checks for the presence of optical signals from 850 nm to 1625 nm.
- If an active fiber is detected, the FiberLert™ provides an immediate visual (light) and audible (tone) indication.
- No setup, calibration, interpretation, or network disconnection is required.
- Use the indication to quickly identify live fiber ports before maintenance, troubleshooting, cleaning, or reconfiguration.
Warranty & Safety:
- 2 Year Manufacturer's Warranty
What's Included In The Box:
- 1 x FiberLert Detector
- 2 x AAA batteries
- Instruction card