XQ5220 is a series of adjustable wavelength optical power meter designed by OSCOM. It adopts InGaAs or Si optical receiving material as light detector, which can realize high-speed measurement, coefficient correction, wavelength arbitrary adjustment, and integrates automatic range switching, insertion loss measurement, PDL measurement, data recording and analysis, RS232C/GPIB communication interface and other functions. The XQ5220 series optical power meter offers a 1/2 channel benchtop device that is reliable and easy to use, very suitable for optical device factory production testing and scientific research unit testing and other applications.