An optical power meter measures and documents the power in an optical signal, particularly in fiber optic systems. This kind of electronic test equipment collects information with accuracy using a calibrated sensor. The sensor consists of a photodiode chosen for the wavelengths and power levels an engineer wants to log. The optical power meter displays the measured power and wavelength digitally. Find used, professionally refurbished optical power meters from Advantest, Anritsu, and Agilent at ValueTronics.com.