YSI INCORPORATED

YSI Incorporated is a manufacturer of water quality monitoring and laboratory analytical instruments headquartered in Yellow Springs, Ohio. The company designs and produces a comprehensive portfolio of portable handheld meters, multiparameter sondes, benchtop laboratory analyzers, autonomous monitoring systems, and data management platforms for environmental water quality assessment and process control applications. Primary product lines include the EXO sonde series for long-term unattended water monitoring, Pro Series portable handhelds (ProDSS, ProQuatro, ProSolo) for field sampling, MultiLab benchtop multiparameter instruments with wireless capabilities, and IQ SensorNet online monitoring systems. YSI also manufactures specialized instruments such as the 9200 Total Organic Carbon Analyzer, ColorVis optical spectrophotometer, THM 1000 VOC analyzer, and autonomous platforms including the SurfBee surface vehicle and EcoMapper Nano underwater vehicle. The company offers integrated solutions through the HydroRIG remote data logger and HydroSphere cloud-based data visualization platform. Markets served include environmental consulting, wastewater treatment, drinking water utilities, aquaculture, research institutions, and industrial process monitoring. YSI provides expert consultation services, on-demand training programs (EXO University), and product selection tools to assist customers in instrument choice and application design. The company is part of Xylem, a global water technology leader.