GAO Tek presents a variety of Optical Time Domain Reflectometers (OTDRs) and locators, which include a selection of products such as OTDRs, OTDR with visual-fault-locators (VFL), fault locators, optical fiber identifiers, and optical fiber rangers. These devices are usually used to certify new fiber installations and locate faults in deployed fiber optic networks.

Functions of OTDR and Locators

Optical Time Domain Reflectometers (OTDRs) are critical instruments utilized by associations to confirm the execution of new fiber optics interfaces and distinguish issues with existing fiber links. OTDR test equipment is mainly used for testing long links.

OTDR testers with VFL are the upgraded versions of testers for the detection of fiber communications systems. The OTDRs with VFL are generally used to affirm new fiber establishments, inspect fibers, and find faults in sending fiber optic systems.

Visual fault locators are designed for fiber tracing, fiber direction-finding and continuity checking in optical networks during and after installation. Optical visual fault locators can locate sharp bends, breaks or damages in fibers, conduct end-to-end continuity tests, perform fiber tracing and identification.

Optical fiber identifiers are reliable devices that identify the presence of signals on optical fibers. They are designed to assure that live fibers are not disconnected and provide the capability to trace fibers from end to end.

Optical fiber rangers are used in optical fiber links troubleshooting, maintenance, and test. The instruments are essential tools for technical experts to install, operate, and maintain the optical fiber.


GAO Tek’s OTDRs and locators are some of the most portable and reliable test instruments in the industry. They adopt the OTDR technical principles and integrate the powerful analysis software, which enables the fiber rangers to detect fiber faults more accurate and easy. Most of the instruments have a long-lasting battery which can endure up to numerous hours. GAO Tek’s handheld and high-performance devices are designed to have an auto test, manual test, dead zone or real-time test mode.

Applications and Industries

GAO Tek´s OTDRs and locators have a variety of applications that include fiber optics engineering, commissioning, and maintenance. They also are well-suited for aerospace and defense, electric utility, fiber optic component and equipment manufacturing, installers and contractors, mining, oil and gas, security, service and content providers, and transportation. Additionally, they are widely used for fiber optic network maintenance in any optical systems including LAN, FDDI, and ATM.


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