Weight: 1.0 lbs.




Part No. 258010 FIBERID Optical Fiber Identifier

The Hobbes FIBERID P/N 258010 is used to detect and identify the direction of fiber signals in an active fiber cable as low as –40dBm at 1550nm. The clever macro-bending and shielding method is designed to minimize light leakage and maintain power value accuracy. The FIBERID is designed to detect an active fiber, identify traffic direction, and measure the power transmitted through a fiber cable without disconnecting it. Also, it uses a safe and reliable macro–bending technique that does not disrupt traffic, nor damage or overstress the fiber.

During installation, maintenance or troubleshooting a fiber network system, the FIBERID is often necessary to isolate a specific fiber from a bundle without disrupting service. By simple clamping the FIBERID onto a fiber, the unit will indicate if there is a 270Hz, 1kHz, or 2kHz test signal from a modulated light source or from network traffic and indicate the signal direction. The FIBERID can also measure and display fiber core power or relative power on the LCD display. When tracing or identifying fiber cables, it can detect 270Hz, 1kHz, or 2kHz test signals that can be provided by any Hobbes OPTISource Light Source. The FIBERID is simple to use and can be reliably used with one hand.


• Hand–held, lightweight, rugged, battery–powered.
• High efficiency live fiber and dark fiber test tool.
• Contains movable shielding design to diminish light leakage and maintain power value accuracy.
• Fiber type: 8 to 10μm, 250μm, 900μm, 2mm and 3mm.
• Modulated tone detection for 270Hz, 1kHz, 2kHz from Hobbes OPTISource Light Sources. Useful for tracing individual fibers.
• Bidirectional traffic detection.
• Continuous signal power display.
• With LCD display.
• Low battery indication.


Wavelength 800 to 1700nm
Fiber Type 8 to 10μm, 250μm, 900μm, 2mm and 3mm
Display Type LCD
Tone Recognition 270Hz, 1kHz and 2kHz
Power Range (dBm) 20 to –40 (1550nm)
Power Measuring Repeatability ±1dB
Insertion Loss < 1dB@1310nm, < 2.5dB@1550nm
Power Measure Units dBm, dB
Power Source 9V battery x 1
Power Consumption Operating current is 9mA when backlight is off, operating current is 32mA when
backlight is on

Ordering Information:

Part Number Description
258010 FIBERID fiber identifier with basic optical power meter function
Weight 1.0 lbs
Dimensions 10 × 6 × 4 in

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