VisiFault is Fluke’s professional handheld Visual Fault Locator (VFL) with Class II safe 650 nm visible red laser, compatible with single-mode and multimode fiber. Based on light leakage visualization principle, it rapidly verifies fiber continuity, traces fiber strands, and locates breaks, cracks, tight macrobends and defective connectors, serving as the essential frontline tool for fiber installation and data center maintenance.

Standard universal 2.5 mm ferrule adapter fits SC/ST/FC large connectors; optional NF380 tip adapts LC/MU 1.25 mm small ferrules. Two output modes selectable: steady continuous light and 2 Hz flashing pulse light, flashing mode simplifies strand identification in multi-fiber cables. Max test range: 3 km multimode, 4 km singlemode. Powered by 2 AA alkaline batteries delivering over 80 hours runtime. Rugged shock-resistant enclosure with included soft carry pouch. It works standalone or paired with Fiber QuickMap, OTDR and OLTS for full fiber troubleshooting workflows.