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Handheld Optical Fiber Identifier



- 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


- Telecom Maintenance

- CATV Maintenance

- Fiber Optic lab testing

- Other Fiber Optic Measurements

JW3306B 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 traffice is present,the intermittently audible tone is activated.
The JW3306B optical fiber identifier alsor 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 JW3306A optical fiber identifier is powered by a 9V alkaline battery .

JW3306B Optical Fiber Identifier, 

4pcs adapter heads, 


Alkaline battery, 

User Manual, 

Cotton Stick and Soft Carrying case.

Standard Packages
Identified Wavelength Range800-1700nm
 Identified Signal TypeCW, 270Hz±5%,1kHz±5%,2kHz±5%
Detector TypeØ1mm 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 DirectionLeft & 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) 
Ø0.25-25~0 (1KHz,2KHz)
-20~0 (2KHz)
Insertion Loss(dB, Typical Value)0.8 (1310nm)
2.5 (1550nm)
Alkaline Battry(V)9
Operating Temperature(℃)-10-+60
Storage Temperature(℃)-25-+70
Dimension (mm)196X30.5X27
Weight (g)200