Water Blogged 

Students Use Water Quality Technology in Conjunction with the Biotic Index


Although students in a science classroom might be familiar with key water quality parameters, it is likely they have no hands on experience with the tools used to measure them. A major initiative for Five Rivers MetroParks is to actively engage the community in conservation...

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Newport Aquarium's Rare Sharks Kept Healthy and Happy with Continuous Water Quality Monitoring


The Newport Aquarium was founded in May of 1999. They have 137 aquatic tanks, 90 of them are exhibits for the public. And the largest tank is the shark tank, the surrounded by sharks exhibit. It is a 385,000 gallon saltwater tank. They're using the YSI 5200A on...

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pH Handbook on Homepage Download

Free Assorted Case of pH Buffer (603824) with purchase of any MultiLab or TruLab instrument!

Welcome to YSI.com

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

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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 feedback@ysi.com