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

Water Blogged 

YSI | 70 Years of Innovation and Invention


YSI was founded on the spirit of innovation. The burning desire to solve a problem, develop a solution, and change the world  is woven into the fabric of YSI and our team.It all started...

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Eye of the Storm | Top Atmospheric Researcher Hurricane Q&A


Hurricanes are among the worlds’ most devastating natural disasters, affecting millions in coastal areas each year. The 2017 hurricane season saw unforgiving storms in the...

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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