It’s never been more critical to monitor and protect the world’s most precious resource - water.

Here at YSI, our goal is to provide you with the most advanced, reliable, accurate, and user-friendly instruments for water quality monitoring. Like you, our engineers and scientists have spent years in the field, developing and using the products we design. Following a legacy of cutting-edge technology, the EXO Sonde Platform was designed to be the ultimate tool for monitoring the health of our oceans, estuaries, rivers, lakes, and groundwater.

EXO helps you protect the world one data point at a time.