An optical power meter is used to measure optical power level in decibel dBm or linear units. A fiber optic power meter is also used with an optical light source for measuring optical cable attenuation in dB, and can also be used to identify fiber ends using the inbuilt tone detector. All Kingfisher handheld optical power meters are coloured blue for easy identification. Alternatively, some users may prefer to make optical fiber measurements with an integrated two-way LTS, or a simple LTS.

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