IQ SensorNet's VARiON, AmmoLyt, and NitraLyt sensors use ion-selective electrodes to provide accurate, reliable measurements. YSI is also the first to offer a Class I, Div 2 rated sensor for locations.

Download YSI's complete guide! Learn about the science of phosphorus, phosphorus limits in municipal wastewater, and removal strategies to help meet wastewater treatment goals and effluent limits.

Not sure which one to choose? Read our blog post comparing ion-selective electrode (ISE) sensors and wet chemistry analyzers.

ISE sensors offer 24/7 monitoring of critical parameters. Learn how to optimize the use of online ISE sensors and get the best data.

Know someone who’s making a difference in your community?
Tell us how they inspired you and why their work should be celebrated.

They could win up to $10,000 in equipment from YSI! (Terms & Conditions Apply.)

Dive into the rich history behind the Clean Water Act (CWA) and learn about the political events that led to it becoming a law.

Also, discover how the CWA has evolved over the past 50 years since its passing!