YSI EXO2 Information The YSI EXO2 is a multiparameter sonde that is designed for water quality monitoring in a variety of environments, including oceans, estuaries, rivers, lakes, and groundwater. It is a rugged and durable instrument that can be deployed for extended periods of time, up to 90 days between service intervals. The EXO2 has a number of features that make it a valuable tool for water quality monitoring. These features include: A wide range of sensors that can measure a variety of water quality parameters, including pH, dissolved oxygen, temperature, conductivity, turbidity, and nutrients. A built-in anti-fouling system that helps to prevent the growth of algae and other organisms on the sensors, which can interfere with data collection. A powerful data logger that can store up to 1 million data points. A user-friendly interface that makes it easy to view and download data. The EXO2 is a versatile instrument that can be used for a variety of water quality monitoring applica...