MAY42 Optical Fiber Identifier

MAY42 Optical Fiber Identifier with VFL included
MAY42 Optical Fiber Identifier with VFL Port
MAY42 Optical Fiber Identifier with Visual Fault Locator
MAY42 Optical Fiber Identifier with VFL Package
MAY42 Optical Fiber Identifier Testing in ODF
MAY42 Optical Fiber Identifier with VFL testing

MAY42 Optical Fiber Identifier can quickly identify the direction of transmitted fiber and display the relative power without any damages to the bending fiber. When the traffic is present, the intermittently audible tone is activated.

MAY42 Optical Fiber Identifier can also recognize the modulation of 270Hz,1kHz and 2kHz. When they are used to detect the frequency, the continuously audible tone is activated.

The housing of MAY42 Optical Fiber Identifier is made of ABS plastics.


  • VFL included
  • Lower power indication
  • Displays the optical power 
  • Suitable for both SM and MM fibers
  • Online testing without interruption of service
  • Easy-to-use with “ONE KEY” operation.
  • No need to replace adapters when testing 250um bare fiber, 900um, 2MM and 3MM cables
  • Efficiently identifies the traffic direction and frequency tone (270Hz, 1KHz, 2KHz) with audible warning
Recognizable Wavelength Range 800 to 1700nm
Recognizable Signal Type CW, 2kHz, 1kHz, 270Hz±5%
Detector Type Ø1mm InGaAs 2pcs
Clamp Type Universal adapter for 250um bare fiber, 900um cable, 2.0mm cable, and 3.0mm cable
Signal Direction Left & right LED
Signal Direction Test Range -40~10dBm
Signal Frequency Display 270Hz, 1kHz, 2kHz
Alkaline Battery 2pcs*AA dry batteries
Operating Temperature -10 to +60℃
Storage Temperature -25 to +70℃
Dimension 218*42*52mm (including the trigger), 218*42*29mm (trigger not included)
Net Weight 138g (battery not included)
Packing for Inner Box 300g, 25*10*6cm
Visual Fault Locator:
Wavelength 650nm
Power ≥10mW
Mode CW/2Hz
Laser Type LD
LED Light support
Connector Universal 2.5mm (FC/SC/ST)
Standard Accessory:
Item Name Quantity
1 MAY42 Optical Fiber Identifier with Universal Adapter 1pc
2 AA alkaline battery 2pcs
3 Soft Bag 1pc
4 Warranty Card 1pc
5 User Manual 1pc

1. Manual