Ysi, INC

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www.ysi.com

Their homepage, crawled AUG 2, 2026

At a glance

EmployeesNot reported

In business since1700

Industry

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

HeadquartersSaint Petersburg, FL

US patents36

SAM.gov UEICJUMWEURJ4D1

CAGE code4M874

Incorporated inOH

Brands

Training, Events, Webinars Monitoring Buoy Selector

Monitoring Buoy Selector

This company sells these brands.

instruments
water quality sampling
monitoring
dissolved oxygen
acoustic Doppler current profilers
ADCPs
current meters
auto samplers
analyzers
total organic carbon
gas chromatography equipment
colorimeters

Named on the company’s own website, read JUL 29, 2026

CareersCareers page — seen SEP 8, 2026

Supplier designations

For Profit OrganizationManufacturer of Goods

Self-certified by the company in its SAM.gov registration

Patents

36 US patents granted 1997–2024, 10 of them in the five years to SEP 2025.

Measurement 29Biotechnology 3Mechanical elements 2Surface technology, coating 1Chemical engineering 1

Swept frequency fluorometer
US 12,061,149 · granted AUG 13, 2024
Extended solid angle turbidity sensor
US 11,860,096 · granted JAN 2, 2024
Multi excitation-multi emission fluorometer for multiparameter water quality monitoring
US 11,656,180 · granted MAY 23, 2023
Spatial gradient-based fluorometer
US 11,604,143 · granted MAR 14, 2023
Induced crosstalk circuit for improved sensor linearity
US 11,519,858 · granted DEC 6, 2022

Newest 5 shown · Granted to Ysi, INC. · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0

Their plants

2 FACILITIES

Facility	City	State	Employees	Status
Ysi, INC	Saint Petersburg	FL	—	ACTIVE
Ysi INC	Yellow Springs	OH	—	ACTIVE

Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.