Photonix PX-Q504 Flashpistol Leak Detector and 1dBm 1550nm Laser Source with Medium Power Source is designed to locate energy leaks in fiberoptic systems due to splice loss, connector loss, breakage, or bending and to identify fibers over long distances.
By simply sweeping over a fiber, this Flashpistol IR light detection probe will give an audio and visual indication whenever it encounters a light loss point.