The S2105 from Saluki Technology is a Optical Time Domain Reflectometer (OTDR) with Event Dead Zone 1.2 to 1.5 m, Attenuation Dead Zone 5 to 6 m, Optical Wavelength 850 to 1625 nm, Dynamic Range 22 to 28 dB, Pulse Width 3 ns to 20 µs. More details for S2105 can be seen below.