About YSI

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 in Yellow Springs, Ohio in 1948. In the beginning, two engineers, Hardy Trolander and John Benedict, embraced their entrepreneurial side, setting out to solve the problems of the day through the application of good science. They were joined by chemist David Jones.

We work with industry and government professionals to provide monitoring and sampling solutions for process improvement and to protect our planet's natural resources.

About YSI

Behind the Brand | An Inside Look at YSI

January 17, 2024

Behind-the-scenes access to our company's people and their daily operations, values, and what...

About YSI

YSI 75th Anniversary Gathering

August 04, 2023

YSI celebrates 75 years of innovation, collaboration, and dedication to high-quality...

About YSI

Mission: Water | Addressing Critical Water Issues

May 23, 2023

Mission: Water is an annual publication that brings awareness to our most precious...

About YSI

Water Abundance | Who's Minding the Planet? | YSI

January 21, 2019

(Video Transcription) It was the beginning of a particularly active year. In fact, this activity...

About YSI

Water Scarcity | Who's Minding the Planet? | YSI

January 21, 2019

(Video Transcription) It was the end of an exceptionally dry year. In fact, it was the end of an...

About YSI

Water Quality | Who's Minding the Planet? | YSI

January 21, 2019

(Video Transcription) It was the start to a particularly eventful summer. Another summer where...

Water Quality Sampling

Thornton Creek Restoration | Urban Watershed

December 04, 2018

A wilderness teems just out of sight in rivers, actually below the rivers in the saturated soils,...

About YSI

Who's Minding the Planet? The Story of YSI Part 1

January 30, 2018

YSI turned 60 in 2008. The Story of YSI is a two-part video series to celebrate who we were at...

About YSI

Who's Minding the Planet? The Story of YSI Part 2

January 30, 2018

YSI turned 60 in 2008. The Story of YSI is a two-part video series to celebrate who we were at...