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Name:Optical Fiber Identifier OFI-4       Model: OFI-4

◇Easy-to-use with “ONE KEY” operation
◇Efficiently identifies the traffic direction and frequency tone (270Hz, 1KHz, 2KHz) with audible warning
◇Displays the relative core power
◇More accurate test with Sunshade
◇Easy-to-replace adaptors
◇Durable metal housing and quality construction
◇Lower power indication
OFI-4 Optical Fiber Identifier can quickly identify the direction of transmitted fiber and display the relative core power without any damages to the bended fiber. When the traffic is present,the intermittently audible tone is activated.
The OFI-4 optical fiber identifier also recogize the modnulation like,270Hz,1kHz and 2kHz .When they are used to detect the frequency, the continuously audible tone is activated.There are four adapter heads available: Ø0.25, Ø0.9, Ø2.0 and Ø3.0. The OFI-4 optical fiber identifier is powered by a 9V alkaline battery .



Identified Wavelength Range

800-1700 nm

Identified Signal Type

CW, 270Hz±5%,1kHz±5%,2kHz±5%

Detector Type

Ø1mm InGaAs 2pcs

Adapter Type

Ø0.25 (Applicable for Bare Fiber),Ø0.9 (Applicable for Ø0.9 Cable )

Ø2.0 (Applicable for Ø2.0 Cable ), Ø3.0 (Applicable for Ø3.0 Cable )

Signal Direction

Left & Right LED

Singe Direction Test Range

(dBm, CW/0.9mm bare fiber)



Signal Power Test Range

(dBm, CW/0.9mm bare fiber)


Signal Frequency Display (Hz)

270, 1k, 2k

Frequency Test Range

(dBm, Average Value)

Ø0.9, Ø2.0, Ø3.0 

-30~0 (270Hz,1KHz)

-25~0 (2KHz)


-25~0 (1KHz,2KHz)

-20~0 (2KHz)

Insertion Loss(dB, Typical Value)

0.8 (1310nm)

2.5 (1550nm)

Alkaline Battery(V)


Operating Temperature(℃)


Storage Temperature(℃)


Dimension (mm)


Weight (g)


Optical signal identify

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Technical support: Ningbo Youxin Optic-Electronic Technology Co.Ltd.

Phone:86-574-89118312 86-574-89118317 86-1860-6600677 Fax:86-574-89118315
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