MAY40 Optical Fiber Identifier OFI SM and MM 800 to 1700nm for bare fiber/0.9mm/2.0mm/3.0mm


SKU: 10472 Category:

MAY40 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.
MAY40 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.There are 3 adapter heads available: 250/900, 2MM and 3MM.


  • Lower power indication
  • Easy-to-replace adapters
  • Displays the opticalpower
  • Suitable for both SM and MM fibers
  • More accurate testing with Sunshadefor outdoor application
  • Online testing without interruption of service
  • Easy-to-use with “ONE KEY” operation.
  • Durable metal housing and quality construction
  • 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 250/900 for 250um bare fiber and Ø0.9mm cable,

2MM for Ø2.0mm cable, 3MM for Ø3.0mm cable

Signal Direction Left & right LED
Signal Direction Test Range (CW/0.9mm fiber) -46~10dBm (1310nm); -50~10dBm (1550nm)
Signal Power Test Range (CW/0.9mm fiber) -50~10dBm
Signal Frequency Display 270Hz, 1kHz, 2kHz
Frequency Test Range

(Average Value)

Ø0.9, Ø2.0, Ø3.0 -30~0dBm (270Hz, 1kHz)
-25~0dBm (2kHz)
Ø0.25 -25~0dBm (1kHz, 2kHz)
-20~0dBm (2kHz)
Insertion Loss (Typical Value) 0.8dB (1310nm); 2.5dB (1550nm)
Alkaline Battery 9V
Operating Temperature -10 to +60℃
Storage Temperature -25 to +70℃
Dimension 196*30*27mm
Net Weight 214g (including 3MM adapter and sunshade)
Packing for Inner Box 390g, 25*9.3*6.2cm

Standard Accessory:

Item Name Quantity
1 MAY40 Optical Fiber Identifier with 3MM Adapter and Sunshade 1pc
2 250/900 Adapter 1pc
3 2MM Adapter 1pc
4 9V Alkaline Battery 1pc
5 Soft Bag 1pc
6 Warranty Card 1pc
7 User Manual 1pc
Weight 0.51 kg
Dimensions 26 × 11 × 8 cm


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