Optical Multimeter, The MT9810B provides high-accuracy and high-reliability evaluation of a wide range of optical devices and optical systems. It offers DFB-LD light sources conforming to the ITU-T wavelength grid, high-stability FP-LDs, and high-power SLD. MT9810B supports three types of optical sensor units and heads -- high-power, high-sensitivity, and general-purpose. It ensures effective support for your future needs as an optical measuring instrument.