Our range of high performance bi-directional loss, length, ORL & optical loss test sets (OLTS) are ideally suited to demanding fiber optic network testing. Featuring versatile optical multimeter type performance in a single unit, we have a fiber optic certifier for from a basic source / meter unit, through to some of the most advanced and integrated handheld fiber cable certifiers available. Some of these fiber OLTS testing models have very high-end accuracy specifications too, and offer a VFL integrated with the test source for greater functionality.