Optical Fiber Identifier

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Optical Fiber Identifier AFI400/420

AFI400/420 series Fiber Identifier is easy to operate, can detect the fiber signal presence without disconnecting it. It is available for 0.25, 0.9, 2.0, 3.0mm fiber, no need to change adapter.

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Fast find fiber in a mass

Indicate signal directions in fiber

Indicate Live or dark fiber

Detect 270Hz, 1kHz, 2kHz from laser source       

Build in VFL 1mW or 10mW (Optional)

Suitable for 0.25, 0.9, 2.0, 3.0mm fiber, no need to change adapter

One-year warranty and Three-year recommended calibration interval


AFI400                                 AFI420S                               AFI420L

Wavelength Range

800 to 1700nm (SM)

Recognizable signal type*

CW, 2kHz, 1kHz, 270Hz ±10%

Detector Type

InGaAs 2pcs

Fiber Type

0.9, 0.25, 2.0, 3.0 mm fiber


+10 ~ -50dBm

Accuracy *

+10dB to -30 dBm (Continuous Wave) /+10dB to -25 dBm (Modulated Signal)

LED Indicator

Signal direction; signal frequency (2kHz/1kHz/270Hz); low battery

Visual Fault Locator

No                                       1mW                                    10mW

VFL Connector

2.5mm universal connector

Power Supply

AA * 2

* at 20±3℃, indoor, 1550nm wavelength, 0.9mm fiber, with white coat, 270Hz, error < 5%,

* 0.25, 2.0, 3.0mm fiber, the performance at continuous wave will be lower

* 1KHz, 2KHz, the performance at modulated signal will be lower

* at 1310nm wavelength, the performance will be lower


230mm * 45mm * 45mm

Weight About 200g
Storage Temperature -20 -- +60°C, < 90%RH
Operating Temperature -10 -- +50°C, < 90%RH

  • Carrying bag  

  • Calibration certificate

  • Manual

  • Packing box

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