Sampling and Monitoring Instruments for Water Quality, Level, and Solutions

New Products

IQSN Mobile App and Data Plan

IQSN Mobile Application and Data Plan

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9800 Photometer

Portable, Multiparameter Photometer

$1,650.00

HydroSphere™

A Scalable Data Visualization Platform for Water Monitoring

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ProQuatro Multiparameter Meter

ProQuatro Portable Sampling Handheld Meter for DO, Conductivity, Salinity, TDS, pH, ORP, Ammonium, Nitrate, Chloride, Temperature and more

$1,399.00

9220 Total Organic Carbon Analyzer

Online TOC Analyzer

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YSI Air Compressors for IQ SensorNet

Single and Multi-Channel Air Compressors for use with IQ SensorNet Sensors

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THM 1000 Selective VOC Analyzer

THM Monitoring System

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EXO2s Multiparameter Sonde

EXO2s Multiparameter Water Quality Batteryless Sonde (7 sensor ports including a central wiper port)

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N-REALYZER

Combustion Analyzer with Starter Kit

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YSIT-1 GOES Radio Satellite Transmitter

GOES Radio Satellite Transmitter

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One Team on a Mission

Spanning over 75 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

Real-Time Water Quality Monitoring for Marine Science | SIMS

The Sydney Institute of Marine Science (SIMS) is a collaborative research and training studio that hosts a range of different research projects. Key focuses include habitat restoration, conservation efforts, and mitigating the effects of climate change on oceans and marine species. SIMS utilizes YSI EXO Sondes to monitor real-time water quality and gather continuous, reliable data they can trust.

YSI Vehicles | AUVs | ASVs | Services

Our three vehicle offerings are the rQPOD and HYCAT, autonomous surface vehicles or ASVs, and the EcoMapper, an autonomous underwater vehicle or AUV. YSI has worked with global experts to design vehicle platforms that are rugged yet affordable for environmental monitoring. Our vehicles are optimized for different environments, applications, and can be used for many kinds of surveys, including water quality, water quantity, hydrographic, bathymetric, imaging, scour, and photogrammetry, to name a few.

Industry-Leading Online Ammonium & Nitrate ISE Sensors for Wastewater

Learn why IQ SensorNet’s ion-selective electrode sensors (ISE) are the best choice for continuously monitoring ammonium and nitrate in wastewater. With many innovative features, the YSI VARiON, AmmoLyt, and NitraLyt provide accurate and reliable measurements to monitor and control the activated sludge process.

5 Reasons to Upgrade from Pro Plus to ProQuatro

Since 2006, the Professional Plus has set the industry standard for water quality sampling, but the time has come for us to say farewell and move toward the future. Now, as the field season approaches, we are excited to crown the ProQuatro, YSI’s latest handheld in the Professional Series line, as the new successor to the Pro Plus throne.

Optical Flow Proves Crucial in High Water Flow at Prado Dam

10/10/2024

The monitoring of accurate and reliable flow data can be particularly challenging in certain site and hydraulic conditions when using traditional measurement methods...

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Water Blogged 

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Featured Products

ProDSS Multiparameter Digital Water Quality Meter

The Ultimate Sampling Handheld. Portable Meter for DO, Conductivity, Salinity, TDS, pH/ORP, Turbidity, Algae, Temperature and more

$2,053.50 - $2,701.50

EXO2 Multiparameter Sonde

Multiparameter Water Quality Sonde for Unattended Monitoring (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

$2,570.00

Pontoon Vertical Profiling System

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

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ProSolo Optical Dissolved Oxygen Meter

Portable Optical Dissolved Oxygen, Conductivity, Salinity, and Temperature Meter.

$1,029.50

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

$2,427.36

HYCAT Autonomous Surface Vehicle

Autonomous Surface Vehicle

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Amazon Bubbler

Self-contained Continuous Flow Bubbler with Fully Integrated Pressure Sensor

$4,103.00 - $4,464.00

IQ SensorNet Alyza Analyzer PO4

IQ SensorNet Orthophosphate Analyzer

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Determine The HAB Monitoring Solution For You

The intuitive YSI HAB (Harmful Algal Bloom) monitoring system selector will provide you with a recommendation for the HAB monitoring solution that best fits your requirements! Your answers to the selector questions will help you think through your options, and will help YSI to get you a solution as fast as possible. You might even be able to buy your solution online TODAY!

Let's Get Started

LOOKING FOR THE BEST INSTRUMENT?

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

What is the Best Titrator for You?

YSI offers a full range of titration solutions to accommodate your titration requirements. Manual or Automated? We can help! Our titrators, and compatible accessories, efficiently determine concentration levels and quickly detect equivalency points accurately.

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What is The Floating Platform for Your Monitoring Needs?

An Integrated System from YSI can be built for almost any water monitoring application. Reveal water quality in the entire water column with a vertical profiler, configure your own unique data buoy or TurnKey system for real-time data collection.

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GET HELP ON YOUR NEXT ENVIRONMENTAL PROJECT

Our technology experts are available to help with everything from instrument selection to data management. YSI, SonTek, Aanderaa, and the Xylem family of brands now offer free virtual consultations for your next water or environmental-related project. Our dedicated application engineers and experts identify the best instrumentation and data collection for your project.

Consult Environmental Experts

FREE VIRTUAL CONSULTATIONS FOR YOUR LABORATORY APPLICATIONS

Our laboratory experts are available to help with everything from instrument selection to application support for various applications. YSI, OI Analytical, and the rest of our Xylem Lab Solutions brands are excited to offer free virtual consultations for your next facility project or upgrade. Our dedicated application engineers and experts identify the best technology for your application.

Consult Laboratory Experts

CONSULT THE MUNICIPAL WATER EXPERTS

Our municipal experts are available to help with everything from instrument selection to application support for wastewater and drinking water treatment. YSI and the Xylem family of brands now offer free virtual consultations for your next facility project or upgrade. Our dedicated application engineers and experts identify the best system for your needs.

Consult Municipal Experts

A PRACTICAL GUIDE TO pH MEASUREMENT - THE pH HANDBOOK

The YSI pH Handbook is a practical guide to pH in the lab or field. It contains helpful tips and recommendations to ensure you take accurate and repeatable pH measurements. This Handbook will help you understand which technology is suitable for your application, maintain the sensors properly, and gather the best pH data possible.

Download pH Handbook

LOOKING TO PERFECT YOUR TITRATIONS?

Want to know what titration is and why it's important? Look no further; we can help. Our Titration Handbook is the perfect download for any user, from beginner to expert! Inside you'll find everything about titration methods and various chemical analysis applications. This Handbook will help you understand which technology is right for you and help you gather the best titration data possible!

Download Titration Handbook

WANT TO KNOW MORE ABOUT PHOSPHORUS? - DOWNLOAD THE COMPLETE GUIDE.

YSI has a long history of helping municipal wastewater treatment facilities meet their treatment goals – from developing the first portable dissolved oxygen meter and manufacturing the golden standard for BOD probes to today’s IQ SensorNet system of sensors for water quality monitoring and control.

Download Phosphorus Handbook

water monitoring on demand training

YSI ENVIRONMENTAL ON-DEMAND TRAINING

Get quick, easy access to on-demand webinars to enhance your understanding of water quality monitoring. YSI experts explore different water quality parameters and how to measure them.

Access On-Demand Training

YSI SHOP

Shop our innovative products and buy confidently with YSI. Our team is available to assist, and we have you covered with all the ordering information you need.

Shop YSI Here

REQUEST PRICING

Looking for a price quote on one or more of our products and accessories? Our knowledgeable team is ready to help you along every step of your projects and purchases.

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ASK A QUESTION

Do you have a support question you want to contact us with? Just fill out our simple form.

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