Water Blogged 

Anatomy of a pH Electrode | Glass pH Probes, Part 4 of 4

05/08/15

The reference junction of a pH electrode, also known as a diaphragm, creates electrical contact between the reference system and the solution. Much like the reference electrolyte, the reference junction must possess certain qualities.

Keep Reading


Nonload Parameters in Surface Water | Dissolved Oxygen

05/06/15

Therefore, DO is one of the most critical parameters that reflects the health of the aquatic ecosystem. Dissolved oxygen measurements provide a direct indication of the ability of the water to support aquatic life other than plants. Indicator species can also provide clues on...

Keep Reading


Read more at our blog

YSI is teaming up with USABlueBook for a FREE live webinar: Advances in Water Quality Analysis Using Electrochemical and Optical Measurement Technology Register Now

Register to Attend


Welcome to the New 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.

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 understand the new site might take a little getting used to, so after searching and getting acquainted, we encourage you to provide your feedback at feedback@ysi.com