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

Water Blogged 

Top Tips for More Accurate Titrations


Titration is a classic technique used for quantifying the presence of an analyte in a sample. The simplicity and overall accuracy of titration procedures is what has kept them in use...

Keep Reading

Closing the Gates | Helping Communities Battle Storms


Terrebonne Parish, Louisiana got the name "good land" from French-speaking settlers, but with 987 square miles of land and 1,079 square miles of lakes and waterways, Terrebonne Parish is actually more water than land. All that water also...

Keep Reading

Read more at our blog

Join us for a Special Live Event: How Turbidity Sensors Work: Principles and Practice in Water Quality Monitoring! July 9th, 2019!

Register to Attend

Welcome to

YSI has served the environmental, water quality and Life Sciences markets for over 65 years. The website was designed for you - to help you learn, review and quickly find the products and information you need to perform your job.

Buy Online
In order to provide a convenient experience we now have online buying for many of our products to the US audience. If a product is available for purchase there will be an 'Add to Cart' button on the product page. YSI products are also available through our distribution partners. To locate a distributor please visit the 'Find a Distributor' page.

Request Pricing 
All of our product pages will have an option for you to request pricing. By simply clicking the button, or link, and providing some information, we will have one of our knowledgeable YSIers provide assistance and pricing.  We encourage you to provide your feedback at