AFL TELECOMMUNICATIONS/NOYES OFI400C FIBER IDENTIFIER NEW The AFL TELECOMMUNICATIONS OFI-400C Optical Fiber Identifier is for use with single mode fibers including 250µm & 900µm, but is specifically designed for 2mm & 3mm jacketed single mode fibers. This Optical Fiber Identifier detects and measures core power levels of optical signals. Live fiber detection helps avoid technician induced outages and interruptions. The OFI-400C features an optical head design with a 2-position plunger for easy use with ribbon fiber or jacked fiber. Includes user guide, batteries and soft carry case.