New Products

Water Quality Monitoring

EXO NitraLED UV Nitrate Sensor

EXO NitraLED UV Nitrate Sensor for Freshwater Environments

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DB600 Data Buoy

All-In-One, Rugged, Remote Monitoring System

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A Scalable, Collaborative Data Visualization Platform for Water Monitoring

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3017M Colorimetric Chlorine Analyzer

DPD Chlorine Analyzer for Municipal Water

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ProQuatro Multiparameter Meter

Multiparameter Instrument for DO, Conductivity, Salinity, pH, ORP, Ammonium, Nitrate, Chloride, Temperature and more.

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One Team on a Mission

Spanning over 70 years, YSI, a Xylem brand has a customer-focused legacy of developing innovative, environmentally-essential technology. Our customers are more than people who use our instruments - they are climate first responders, environmental stewards, and researchers who are passionate about our world along with scientific integrity.

Learn More About YSI

5 Reasons to Upgrade from the Pro Plus to the ProQuatro


YSI ProQuatro is replacing the YSI Pro Plus. Since 2006, the Professional Plus water quality instrument has set the industry standard for water quality sampling, but the time...

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Featured Products

YSI ProDSS Multiparameter Water Quality Meter

Digital Sampling System multiparameter​ handheld water quality meter for extreme flexibility. Meter Only.

$1,683.00 - $2,204.00

EXO2 Multiparameter Sonde

Multiparameter Water Quality Sonde with 7 sensor ports (including a central wiper port)

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IQ SensorNet 2020 3G Controller

Modular water quality monitoring system for a complete sensor network that measures up to 20 parameters

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Pontoon Vertical Profiling System

Ideal for Ponds, Lakes, Reservoirs, and Certain Coastal Applications

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ProSolo Digital Water Quality Meter

Optical Dissolved Oxygen, Conductivity, and Salinity Digital Handheld Instrument. Meter Only.


2900M Online Monitor & Control System

Two Chemistry Online Monitor & Control System

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MultiLab 4010-3W

Three channel benchtop multiparameter instrument with wireless capability


HYCAT Autonomous Surface Vehicle

Autonomous Surface Vehicle

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Amazon Bubbler

Self-contained Continuous Flow Bubbler with Fully Integrated Pressure Sensor

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IQ SensorNet Alyza Analyzer PO4

IQ SensorNet Orthophosphate Analyzer

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Do you know a water hero?

Who's Minding the Planet (#WMTP) is more than a tagline, it's a way of doing business. A way we work with scientists, engineers, and other water heroes who live it everyday. We'd love for you to nominate your water hero (even if it's yourself). You determine what constitutes a water hero and who you feel is working to mind the planet and mind our most precious natural resource - water.

Nominate a Water Hero


Finding the right handheld water quality meter should be easy. Just take our short quiz and the intuitive product selector will provide you with an immediate recommendation based on your needs! From the single-parameter, analog Pro10 to the multiparameter, all-digital ProDSS, we've got you covered.

Choose the Right Handheld


The Alyza IQ PO4 is an online, cabinet-style analyzer used for continuous monitoring of orthophosphate in a municipal water resource recovery factility. This analyzer is weatherproof and can be deployed anywhere in the wastewater treatment process. Applications include monitoring bio-p removal and monitoring and controlling chemical phosphorus removal.

Meet Alyza


Get back to basics with Xylem's Titration Handbook:  an  all-encompassing guide to help any laboratory navigate one of the oldest quantitative methods in chemical analysis.

Download the Handbook


Our experts dive into the evolution of sensor technology and how they work. In this series, we dive into the following parameters in great detail; algae, turbidity, conductivity, pH & ORP, and dissolved oxygen.

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