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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

IQ SensorNet 2020 XT

The ideal modular system for continuous online wastewater process monitoring and control.

ProODO

Handheld dissolved oxygen meter provides extreme durability for measuring optical DO with luminescent technology for the field or lab BODs.

3824 Assorted pH Buffers Case

The 3824 case contains two 1-liter containers each of pH 4, 7, and 10 calibration buffers.

YSI Water Blogged: All Things Water | RSS Feed

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Support

We Know DO Resources

What is the True Cost of Your Data?

Webinars

Careers

YSI Product Recycling Program

Manuals, Specs, Catalogs, MSDSs...

All Product Accessories


Other Divisions

YSI Life Sciences

SonTek

YSI Systems

WaterLog

YSI ISA - Instrumentos e
Servicios Ambientais
(Latin America)

 

Xylem Analytics UK

YSI Middle East

YSI South Asia / India

Xylem Analytics China

YSI Japan

Xylem Analytics Australia

Send me a Quote! 10 Tips to Prevent Biofouling

Multiparameter Sondes

EXO1

EXO2

6600 V2

6920 V2

600OMS V2

Legacy Sondes

All Legacy Sondes

CTD

CastAway CTD

Process Monitors

IQ SensorNet 2020 XT

IQ SensorNet 182

P 700 Orthophosphate

Aquaculture Systems

5200A Multiparameter

5400 MultiDO

5500 MultiDO Optical

AquaViewer App

Professional Series

Handheld Instruments

Pro Plus Multiparameter

ProODO Optical DO/OBOD

Pro20 Lab/Field DO

Pro1020 Field DO/pH/ORP

Pro1030 Field pH/ORP/Cond

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

Colorimeters

900 Chlorine

910 COD

pHotoFlex Colorimeters

Laboratory Series

pH1200

5000/5100 BOD/DO

3200 Conductivity

3100 Conductivity

MultiLab 4010-1

MultiLab 4010-2

MultiLab 4010-3

TruLab 1110

TruLab 1310 and 1310P

TruLab 1320 and 1320P

EcoSense

pH10A - pH Pen

pH100A - pH

ORP15A - ORP Pen

DO200A - DO

EC30A - Conductivity Pen

EC300A - Conductivity

9300/9500 Photometer

All YSI Accessories

Sensors, Cables, Calibration Solutions & more...

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

YSI Systems

DAA WaterLog

YSI Life Sciences

Ammonia/Ammonium

Blue-Green Algae

BOD (Biochemical Oxygen Demand)

CDOM

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

Colorimeter Parameters

Photometer Parameters

Aquaculture

Coastal

Desalination

Estuary

Drinking Water

Groundwater

Hydraulic Fracturing

Laboratory

Oceans

Raw Water

Source Water

Storm Water

Surface Water

Wastewater

Watersheds / TMDL

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Welcome from the GM

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Environmental Stewardship

Sustainability

Quality

Xylem Watermark

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