Sichuan University uses the LL-IS BOD-Q water quality analyzer from Chongqing Zhongke Dexin Environmental Protection Technology Co., Ltd., which can measure the BOD of polluted surface water, domestic sewage, and various industrial wastewater. The instrument can simultaneously sample 8 samples, controlled by a microcomputer, with intelligent measurement, real-time display of readings and graphics on the screen, and real-time monitoring of the measurement process. Engineers on-siteDebugging and training of LL-IS BOD-Q water quality analyzer to assist Sichuan University in fulfilling scientific research and teaching needs.