Fiber Checker is a handy tool to check the breaks and faults of the fiber in the optical network and FTTH construction. With short visible wavelength, Fiber Checker can be a fiber broken indicator.

Fiber Checker sends a visible 650nm wavelength red laser light through a fiber optic cable, the breaks or faults in the fiber will refract the light, creating a red bright glow around the faulty or broken fiber area. While you are located in manhole such tiny space, Fiber Checker is your best handy tool.