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Welcome to YSI.com

YSI is a developer and manufacturer of sensors, instruments, software, and data collection platforms for environmental water quality monitoring and testing. Reaching beyond our products, we build relationships with our customers through our dedicated customer service, including technical applications and service support.

YSI Demo Equipment Clearance Sale!
Featured Products

6600V2

Data sonde designed for in situ monitoring and profiling; ideal for long-term deployments requiring a complete water quality data record.

IQ SensorNet 182 Models

The ideal modular system for online wastewater monitoring for 1 to 4 sensors.

Sensor Adapter Kit

Expand your water quality monitoring to include hydrocarbons, oil or CDOM with YSI Sensor Adapter and Turner Cyclops-7 submersible sensors.

Wastewater Treatment Plant Improves Efficiency with the IQ SensorNet

YSI IQ SensorNet Your Brains Our IQ - The Smart Choice

A Colorado wastewater treatment plant monitors ammonia and dissolved oxygen to improve their process efficiency....

 

 

EXO Breaks the Sonde Barrier

EXO1 sonde with 4 sensors

Advanced water-quality monitoring instruments for demanding environments

March 12, 2012 -- YSI has used its long experience in water quality monitoring to develop the ultimate multiparameter sondes for challenging marine and freshwater conditions....

 

 

Find & Follow

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Support

We Know DO Resources

What is the True Cost of Your Data?

Webinars

YSI Product Recycling Program

Manuals, Specs, Catalogs, MSDSs...

All Product Accessories


Other YSI Divisions

YSI Life Sciences

SonTek/YSI

YSI Systems

AMJ Environmental

Design Analysis Associates

YSI ISA - Instrumentos e
Servicios Ambientais
(Latin America)

 

YSI Hydrodata (UK)

YSI Middle East

YSI South Asia / India

YSI China

YSI/Nanotech (Japan)

YSI Australia

YSI EXO advanced water quality monitoring platform

6-Series

Multiparameter Sondes

6600 V2

6600EDS V2

6920 V2

6820 V2

600OMS V2

600XL V2 / 600XLM V2

600XL / 600XLM

600QS

600R

600LS

600DW

6920DW

650MDS

6500 Process Monitor

Anti-Fouling Solutions

6-Series Software

EcoWatch

AQUARIUS Time-Series

Streamline-ENV

All YSI Product Accesories - Sensors, Cables, Calibration Solutions & more...

Professional Series

Handheld Instruments

Professional Plus
Multiparameter

ProODO Optical DO/OBOD

Pro20 Lab/Field DO

Pro2030 Field DO/Cond

Pro30 Field Cond

Classic Handheld Series

556MPS Multiparameter

550A Dissolved Oxygen

63 pH/Conductivity

60 pH

58 Lab/Field DO

55 Dissolved Oxygen

30 Conductivity

Level Scout

Level Scout Level & Temp

Laboratory Series

5000/5100 BOD/DO

3200 Conductivity

3100 Conductivity

EcoSense

pH10A - pH Pen

pH100 - pH

ORP15A - ORP Pen

DO200 - DO

EC300 - Conductivity

9300/9500 Photometer

Aquaculture Systems

5200A Multiparameter

5400 MultiDO

Process Monitors

IQ SensorNet 2020 XT

IQ SensorNet 182

YSI CTD

CastAway CTD

YSI Systems

Buoys & Floating Platforms

EcoMapper AUV

EcoNet Data-to-Web

Vertical Profiling

Towed Underwater Vehicles

Underway Sampling System

Other YSI Products

SonTek Acoustic Doppler Systems for water velocity

AMJ Environmental Custom Services

Design Analysis Associates WaterLog Series

YSI Life Sciences

Most Common

Ammonia/Ammonium

Blue-Green Algae

BOD (Biochemical Oxygen Demand)

Chloride

Chlorophyll

Conductivity

Depth

Dissolved Oxygen

Free Chlorine

Level

Nitrate

Oil / Hydrocarbon

ORP / Redox

Photosynthetic Active Radiation (PAR)

pH

Resistivity

Rhodamine

Salinity

Specific Conductance

Temperature

Total Dissolved Solids (TDS)

Turbidity

Photometer Parameters

Aquaculture

Coastal

Desalination

Estuary

Drinking Water

Groundwater

Hydraulic Fracturing

Laboratory

Oceans

Raw Water

Source Water

Storm Water

Surface Water

Wastewater

Watersheds / TMDL

Ask a Question

Events & Training

Find a Distributor

Product Service

Resource Library

Software Downloads

Welcome from the GM

History

News

Career Opportunities

Environmental Stewardship

Sustainability Report

Quality

Xylem Watermark

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Copyright © 2011 YSI Inc. / Xylem Inc. All rights reserved.
YSI Incorporated | 1700/1725 Brannum Lane | Yellow Springs, OH 45387 USA
+1-937-767-7241 | 800-765-4974 | environmental@ysi.com
YSI is a trademark of Xylem Inc. or one of its subsidiaries. Learn more about Xylem and Xylem Analytics.