OMK-6 optical power meter with multi mode and single mode light sources. Measurement errors are eliminated because the power meter automatically detects the wavelength being transmitted by the light source.
Level measurement is -65~10dBm. Single mode dynamic range with continuous wave is 58dB (approx 145km@1310nm & 230km@1550nm). Multi mode dynamic range with continuous wave is 40dB (approx 20km at 850nm & 50km at 1310nm).