Automated Underwater

Vehicles (AUV)

EcoMapper

Buoys & Platforms

EMM700 Buoy

Harbour Buoy

HD-125 Buoy

PISCES Platform

CTD

CastAway CTD with GPS

Enclosures

Custom Cabinets

Flow - Continuous

Argonaut-SL

Argonaut-SW

Velocity Radar

Continuous Flow Accessories

Frames / Mounts

Flow - Instantaneous

RiverSurveyor S5 and M9

FlowTracker Handheld-ADV

Instantaneous Flow Accessories

Cable Chimp II

Remote Boat for ADCP

Torrent Board

Level

Bubbler - H-3553

H-3121 & H-3122

Level Scout Level & Temp

Radar

Laboratory

Pro OBOD

9300 / 9500 Photometer

Ocean/Coastal Velocity

Argonaut MD

Argonaut XR

V-Fins

Process Monitors

HydroSAM

6500

Water Quality
Handheld Instruments

Pro Quatro

ProPlus

ProODO

Pro 2030

Pro 20

Water Quality
Vertical Profilers

Profilers

Water Quality Sondes

6-Series Multiparameter Sondes

Sonde Accessories

650MDS Data Display/Logger

Anti-Fouling Kits

Mounting Frames

Oil-in-Water Sensor Kit

PAR Sensor Kit

Telemetry

EcoNet Data-to-Web

PeliNet Portable

System 5000

522+

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Resource Library

Warranty Form

Director's Welcome

Application Specialists

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Sustainability Report

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Browse Products

YSI instruments have a worldwide reputation for rugged reliability as well as innovative sensor technology. YSI offers a large range of water quality monitoring and SonTek velocity and flow instruments that are sure to suit your laboratory, hydrology and field water testing requirements.

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Product Quick List

EXO advanced water quality monitoring platform

EcoMapper AUV

CastAway™ CTD with GPS

6-Series Multiparameter Sondes

650MDS Data Display / Logger

HydroSAM Intake Monitor

EcoNet: Data-to-Web

6500 Process Monitor

ProPlus Quatro Multiparameter

ProPlus Multiparameter

ProODO Optical DO Meter

Pro 20 DO / Temp

Pro 30 Temperature / Conductivity / Salinity / TDS

Pro 2030 DO/Temp/Cond

FlowTracker Handheld-ADV

SonTek-IQ Flow Velocity in 3D

RiverSurveyor S5 and M9

Argonaut MD Mooring Deployed

Argonaut-SL Side-Looker

Argonaut-SW Shallow Water

Argonaut XR Extended Range

Real-time Flow Display

Remote Boat for ADCP

System 5000 Modular Data Acquisition System with Touch Screen

H-3553 Bubbler / Pressure

H-3611/H-3612/H-3613 SDI-12 Radar Water Level Sensors

H-522+ Datalogger with integrated meteosat transmitter

H-3121/H-3122 Submersible Pressure/Temperature Sensor

RQ-30 latest generation RADAR for non-contact discharge measurement

Snow Pack Analysing System

USH-8 ultrasonic snow depth sensor

Snow Pillow

9300 / 9500 Photometer

Towed Depressor Fins

PISCES High Speed Monitoring Platform

Vertical Profiling Systems

HD-125 Buoy Platform

Harbour Buoy Platform

EMM700 Buoy Platform

PeliNet Portable Telemetry

Custom Cabinets

Anti-Fouling Kits

Oil-in-Water Sensor Kit

Photosynthetically Active Radiation (PAR)

Torrent Board

Cable Chimp II

Custom Frames / Mounts

MST-2 Salt-Tracer / mobile discharge measurement