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光ファイバ心線対照器 FI720

Optical Fiber Identifiers

This product has been discontinued

The FI720, part of the FI700 Series of Optical Fiber Identifiers, is the safe, economical and non-destructive way to identify live optical fibers. These rugged units use local detection technology, which employs a macro-bend method, eliminating the need to open the fiber at the splice point for identification.

All models detect continuous wave, live optical transmission and low frequency modulated tones at 270 Hz, 1 kHz, and 2 kHz. The presence of traffic, the direction of the transmission and modulated tones on the fiber are indicated by LEDs. In addition, the FI720 models measure the fiber's relative power and displays the reading on a two-digit, seven-segment LED. This allows for measurement of power loss through a splice or connector.

  • Provides safe, economical and non-destructive way to identify live optical fibers
  • Maximum range:
    • FI720: 0 to -40 dBm; ± 2.0 dBm
    • FI720C: +20 to -20 dBm
  • Detection of modulated tones; 270 Hz, 1 kHz, 2 kHz
  • Single-hand operation
  • Light weight 212 g (7.5 oz.)
  • Interchangeable head for ribbon, jacketed and coated fiber allows virtually any fiber to be identified



 FI720 FI720C
 Insertion Loss
<0.5 dB
<0.5 dB
 <0.5 dB
 Spectral Response
 800 to 1700 nm
 800 to 1700 nm
 800 to 1700 nm
 Optical Tone Receiver
 270, 1 and 2 kHz
 270, 1 and 2 kHz
 270, 1 and 2 kHz
 Maximum Range
 0 to -40 dBm
 0 to -40 dBm; ±2.0 dBm
 +20 to -20 dBm
 Relative Power
 No YesYes
 Fiber Stress
 None; Macro-bending