YSI

YSI - a Xylem brand

YSI's environmental products provide high quality, high resolution data to better understand and manage our water resources. They are used for wastewater process control, climate change and drought studies, flood monitoring and warning, stormwater runoff monitoring, groundwater quantification and contamination, aquaculture production and source water safety. In addition to standard products, YSI's custom integrated systems help customers obtain critical data in most any application. Tell us what you need and let us design and deploy a total system, even if you simply just want the data.

Our environmental products provide infrequent maintenance cycles, user interchangeable sensors, and field-rugged enclosures all backed up by a passionate and knowledgeable technical support team.

YSI Life Science and laboratory products are considered the Gold Standard for QC applications. They are used for process control, research and industrial applications by food and beverage, environmental, biofuels, biotech and pharmaceutical customers.

When purchasing YSI, you can expect proven products and technologies that provide true value and low TCO (total cost of ownership). Whatever your instrumentation need, YSI is ready to provide a reliable solution. We know you are passionate about your work...we are equally passionate and enthusiastic about what we can offer to help you succeed.

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  • Products
Fixed - Vertical Profiling System

YSI 6950 Fixed - Vertical Profiling System

designed for a pier, piling, or dam face

Mountable on a dam, pier, piling, or other stationary location, the 6950 offers user-programmable sample intervals with wireless transmission options. The YSI 6950 is compatible with all YSI EXO and 6-Series sondes equipped with depth, and comes with Profile Wizard software for easy set-up and deployment.

Multiparameter water quality verticle profiler

YSI 6951 Pontoon - Vertical Profiling System

Ideal for ponds, lakes, reservoirs, and certain coastal applications

The YSI 6951 Pontoon Vertical Profiling System offers user-programmable sample intervals, redundant error recovery logic that detects unexpected activity and recovers automatically, and is compatible with all YSI EXO and 6-Series sondes equipped with depth.

ysi-prodss

YSI ProDSS - Digital Sampling System

Handheld Multiparameter Instrument with Digital Sensors

The YSI ProDSS - Digital Sampling System - is the ultimate water quality field instrument for sampling and profiling. With the ProDSS, we have answered our customer's demands to produce a truly rugged, reliable and smart multiparameter handheld instrument.

WaterLOG Amazon Bubbler

YSI Amazon Water Level Bubbler

The YSI Amazon Water Level Bubbler is a smart gas purge system built with communication and ease of setup in mind. The Amazon Water Level Bubbler Systems rugged design was developed for hydrologists and water professionals to provide long-term accurate and repeatable level readings. It can be used as a stand-alone unit or sensor with a full suite of communication protocols including SDI-12, MODBUS via RS-485 or TCP, and 4-20mA. The Amazon requires no special software and is easily configured with an optional display and or web browser GUI. WaterLOG's team of professionals have been providing bubbler support for over 20 years.

proodo Optical dissolved Oxygen meter

YSI ProODO - Optical Dissolved Oxygen Meter

Simply the best handheld optical dissolved oxygen instrument on the market.

The YSI ProODO is the best handheld optical dissolved oxygen instrument on the market. The handheld dissolved oxygen meter provides extreme durability for measuring DO with optical, luminescent based technology for both the field and lab.

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YSI Professional Plus Multiparameter Meter

Most Versatile Handheld Multiparameter Instrument

The YSI Professional Plus handheld multiparameter meter provides extreme flexibility for the measurement of a variety of parameters such as DO, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature.

YSI-pro1020

YSI Pro1020

Handheld field dissolved oxygen / pH / ORP Meter

The Pro1020 provides everything you need in a handheld meter that measures dissolved oxygen and temperature along with either pH or ORP (redox). Rugged, simple and reliable. Measure pH or ORP, dissolved oxygen, and temperature.

ysi-pro1030

YSI Pro1030

Handheld Field pH / ORP / Conductivity

The Pro1030 provides everything you need in a handheld meter that measures pH or ORP (redox) along with conductivity. Rugged, simple and reliable. Measure pH or ORP, salinity, conductivity, specific conductance, TDS, and temperature.

ysi-pro2030

YSI Pro2030

Handheld Field Dissolved Oxygen, Conductivity, Salinity Meter

The ideal replacement for the discontinued YSI Model 85. The Pro2030 provides everything you need in a handheld dissolved oxygen meter that automatically compensates for changes in salinity values. Rugged, simple and reliable. Measure DO, salinity, conductivity, specific conductance, TDS, barometric pressure and temperature.

ysi-pro10

YSI Pro10 pH / ORP Meter

Handheld Field pH / ORP Meter

The Pro10 provides everything you need in a handheld meter that measures temperature along with either pH or ORP (redox). Rugged, simple and reliable. Measure pH or ORP, and temperature.

ysi-pro20

YSI Pro20 Dissolved Oxygen Meter

Lab / Field Dissolved Oxygen (D.O.) Meter

The Pro20 provides everything you need in a handheld dissolved oxygen meter. Ruggedness, simplicity and reliability are the cornerstones of the instrument's design.

ysi-pro30

YSI Pro30 Conductivity, Salinity Meter

Field Conductivity / Salinity / Specific Conductance / TDS Meter

The Pro30 provides everything you need in a handheld meter that measures salinity, conductivity, specific conductance, total dissolved solids, and temperature. Rugged, simple and reliable.

EcoSense ODO200 Handheld

YSI EcoSense ODO200 Handheld - Optical Dissolved Oxygen Meter

Ideal for Dissolved Oxygen (DO) sampling

Accurate, economical, handheld dissolved oxygen measurements using optical technology.

The EcoSense® line of compact, handheld instruments provides the most accurate data in the most affordable format. The instruments feature an easy-to-use interface, one-hand operation, IP67 waterproof case, and low cost of ownership over the life of the product.

EcoSense pH100A Meter Kit

YSI EcoSense pH100A Meter Kit

Simple, one handed operation for pH readings or mV values and temperature

YSI's EcoSense® product line of compact, handheld instruments includes the pH100A pH meter. For simple, one handed operation for pH readings or mV values and temperature the pH100A is a logical choice.

EcoSense DO200A Dissolved Oxygen Meter Kit

YSI EcoSense DO200A Dissolved Oxygen Meter Kit

Fast dissolved oxygen response times in wastewater, surface water, and aquaculture applications.

The DO200A is part of the EcoSense® family of products. The DO200A dissolved oxygen instrument offers fast dissolved oxygen response times in wastewater, surface water, and aquaculture applications.

YSI EXO2 multiparamter water quality instrument

YSI EXO2 Multiparameter Sonde

6-Port Multiparameter Water Quality Sonde with Anti-fouling Wiper

The EXO advanced water quality monitoring platform includes the versatile multiparameter EXO2 sonde for oceanographic, estuarine, or surface water applications. Collect data to 250m with the advanced EXO2 sonde – contains six replaceable 'smart' sensors and a central wiper to clean biofouling.

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YSI i3XO EcoMapper AUV

The next generation of autonomous water quality vehicles. The i3XO EcoMapper generates high-resolution maps of water quality, water currents, bathymetry, and sonar imagery.

YSI partnered with Ocean Server Technology to combine the Iver3 Autonomous Underwater Vehicle and the YSI EXO water quality system to create the i3XO AUV. The i3XO is the combination of the latest in water quality and AUV's combined into one robust monitoring platform.

EMM25 - Sonde Spar

YSI EMM25 - Sonde Spar

low cost, rapid deployment, short term use buoy

Looking for a cost effective way to deploy a water quality sonde? The YSI EMM25, Sonde Spar is designed to be a low cost option for short and long-term monitoring. It's simple to use design allows for rapid deployment for event monitoring and emergency response. The lightweight design allows for the system to be deployed by a single person; it can be deployed from a small boat or from shore. The integral deployment tube will accept any YSI EXO or 6-Series sonde or 3rd party device.

Available options for the EMM25 Sonde Spar include an amber, self-contained flashing beacon for deployments in navigable waters. Bluetooth connectivity for remote data access from a compatible Bluetooth enabled device.

EMM68 - Harbor Buoy

YSI EMM68 - Harbour Buoy

Robust monitoring system in a small, compact design

The Harbour buoy provides a quickly deployable water quality monitoring platform with remote telemetry. The system can be lifted by two people. And it is completely serviceable from a small boat.

Remote data delivery keeps you informed of changing conditions as they occur, such as storms, discharges, CSOs, TMDLs, dredging, and construction. Collect data in waters as shallow as 1.8 meters.

EM1250-coastal-monitoring

YSI EM1250 Buoy

Monitoring buoy for inland and coastal waters with multiple sensor payload

Flexible buoy platform to support a wide array of water quality instrumentation and other systems. Ideal for lakes, rivers, reservoirs, and near coastal applications. The YSI 1250 Buoy is easy to handle and can be deployed from most small vessels.

EMM700

YSI EMM700 - Bay Buoy

Monitoring buoy for coastal waters or multiple sensor payload

With more free-board and greater load capacity, this buoy supports a wide array of water quality instrumentation and other systems. Heavy-duty, lightweight foam hull withstands collisions and harsh conditions in lakes, ponds, rivers, reservoirs, and near coastal applications. The YSI Bay Buoy is easy to handle and can be deployed from most small vessels.

EMM-2

YSI EMM2.0 - Coastal Buoy

monitoring buoy designed for coastal and blue water applications

The YSI EMM2.0 is one of the most versatile and reliable buoy solutions on the market. These buoys have been deployed with wet-chemistry nutrient and metal analyzers, current meters, water quality monitors, GPS, atmospheric sensors, wave sensors, hydrocarbon sensors, and more. The stable platform can be easily customized to maximize instrumentation on a single monitoring platform. Adding satellite, radio, or cellular telemetry provides data to a custom visual display, making it easy for researchers and operators alike to receive critical data on a daily basis.

storm3-data-to-the-web

YSI Storm 3 'Data to the Web'

Unlimited Stations | One Low Cost Subscription

The Storm 3 Data Logger incorporates a balanced set of inputs for analog, digital I/O and SDI-12 smart sensors to allow communication through cellular modems and GOES satellite. You'll love how easy it is to configure and collect data using the browser-based graphical user interface (GUI) with all standard web browsers on PCs, tablets and smart phones.

2900D Biochemistry Analyzer

YSI 2900D Biochemistry Analyzer

Offers speed and flexibility with the precision and accuracy you need

The YSI 2900 features an intuitive graphical user interface, a USB port for data retrieval, and the ability to measure samples from a variety of sample holders including 96 well plates and microcentrifuge tubes, making 2900 series analyzers the easiest to use and most cost effective way to measure the following chemistries in a wide range of application areas.

2900M Online Monitor & Control System

YSI 2900M Online Monitor & Control System

YSI 2900 Biochemistry Analyzer with YSI 2960 Online Monitor and Control System.

exo1

YSI EXO1 Multiparameter Sonde

Multiparameter 4-port water quality sonde

Capturing accurate data in fresh water, ground water and marine aquatic environments is easy with . The versatile multiparameter EXO1 sonde is ideal for estuarine, surface water, or ground water applications.

Instrument Only. Cables, probes/sensors, and accessories sold separately - please see the "Accessories" tab for details.

ysi-6600V2

YSI 6600 V2 Sonde

Simultaneous measurement of conductivity (salinity), temperature, depth or level, pH/ORP and more

The YSI 6600 V2 data sonde is the most comprehensive water quality monitoring equipment available with simultaneous measurement of conductivity (salinity), temperature, depth or level, pH/ORP and...

MCERTS certified

ysi-6920

YSI 6920 V2 Sonde

Real-time turbidity monitoring, dissolved oxygen monitoring, algae monitoring, and more.

The YSI 6920 V2 sonde is an economical water quality logging system, ideal for long-term in situ monitoring and profiling.Real-time turbidity monitoring, dissolved oxygen monitoring, algae monitoring, and more.

MCERTS certified

YSI 6820 V2 Multi Parameter Water Quality Sonde

YSI 6820 V2 Multiparameter Water Quality Sonde

Compact Sonde for Field Sampling

The YSI 6820 V2-2 is a cost-effective data sonde for profiling and spot-checking water quality in rivers, lakes, wetlands, wells, estuaries, and coastal waters.

MCERTS      certified

5500D MultiDO

YSI 5500D MultiDO Optical Monitoring and Control Instrument

Designed specifically for Aquaculture Systems

Designed specifically for Aquaculture Systems, the YSI 5500D and AquaManager® Software integrate process control, alarming, and data management into one product. Simple enough to monitor one tank, powerful enough to manage a full scale farming operation from anywhere in the world. Simultaneously measure dissolved oxygen with optical technology in multiple tanks or ponds.

600OMS

YSI 600OMS V2 Sonde

Single-Parameter, Low-Cost Optical Monitoring

Measure optical dissolved oxygen, chlorophyll, blue-green algae, rhodamine, or turbidity in combination with temperature, conductivity and depth. Designed for use in fresh, sea or polluted waters, the 600OMS V2 data sonde utilizes the field-proven YSI sensors and incorporates innovations in water quality sensor modules that fits into the sonde body.

Nile Radar Series

YSI WaterLOG Nile Water Level Radar Series

Non-contact water level sensor

NEW Nile Series 502/504/517 models! Designed for non-contact water level measurement. The WaterLOG Nile Series (502/504/517) combines high accuracy with an out-of-the-box measurement range of up to 70 m. The rugged, innovative design was inspired for installation on a bridge or other structure over the water—making this series ideal for sites that may have ice or other instrument-damaging debris. Its reliable interface and simple SDI-12 communication ensure seamless integration with current water monitoring stations. With three models to choose from, the Nile Series is sure to meet your water monitoring needs.

YSI EXO Wiped Conductivity & Temperature Sensor

YSI EXO Wiped CT Conductivity & Temperature Sensor

Better conductivity measurements for the EXO2 platform

In long-term water quality monitoring, biofouling is public enemy number one. Biofilms, barnacles, and algal growth are common culprits of poor data quality, clogging up conductivity cells and coating sensor optics. While YSI EXO2's Central Wiper can mechanically remove biofouling from other sensors to maintain data integrity over long deployment periods, the anatomy of a standard conductivity & temperature sensor makes this anti-fouling technique ineffective...until now.

Introducing the EXO Wiped Conductivity & Temperature sensor from YSI, designed with and engineered for compatibility with EXO2's Central Wiper.

EXO2 Central Wiper

YSI EXO2 Central Wiper

For use with the EXO2 platform only. Does not function on its own.

Monitor without interruption and reduce biofouling

The EXO2 Central Wiper occupies the central port on an EXO2 sonde, and is used to keep the payload sensor faces clean during long-term deployments. There's no escaping biofouling in underwater measurements. To keep it from interfering with data, an EXO2 sonde can be equipped with this anti-fouling wiper to prolong deployments and improve data accuracy.

2950D Biochemistry Analyzer

YSI 2950D Biochemistry Analyzer

3 biosensor modules, measures up to 6 parameters. Fast and Accurate - The YSI Gold Standard.

YSI has earned a reputation as the Gold Standard in bio-analytical instruments with highly accurate sensors and rapid results. The key to generating analyte-specific results in 60 seconds or less is YSI's innovative biosensor technology.

5200A Multiparameter Monitoring and Control Instrument

YSI 5200A Multiparameter Monitoring and Control Instrument

Designed specifically for Aquaculture Systems

Designed specifically for Aquaculture Systems, the YSI 5200A and AquaManager™ Software integrate process control, alarming, and data management into one product. Simple enough to monitor one tank, powerful enough to manage a full scale farming operation from anywhere in the world. Simultaneously measure dissolved oxygen, pH, conductivity, ORP, salinity and temperature.

EXO_hh_1

YSI EXO V2 Handheld Display

Introducing the new EXO Handheld from YSI, designed and engineered as a dedicated interface to EXO sondes.

Log real-time data, calibrate sensors, set-up sondes for deployment, and transfer water quality data to a PC with this feature-packed device. Designed for reliable field use in challenging environmental conditions, this display features a waterproof IP-67, impact-resistant case and wet-mate connector.

YSI 600LS Water Level Sonde

YSI 600LS Water Level Sonde

Precise Level Measurement in a Compact Sonde

Measure level, flow, temperature and conductivity with the compact 600LS sonde. Rugged and waterproof, the YSI 600LS is perfect for tide gauge monitoring, wetlands level applications, ground water, estuaries, rivers, and more.

YSI MultiLab IDS Kit

YSI MultiLab ProODO Kit

Laboratory instrument for pH, ORP, conductivity and BOD in any combination.

YSI MultiLab ProODO instrument provides easy to use and calibrate menu-driven operation ideal for the laboratory, with special BOD features.

5100 Dissolved Oxygen Instrument

YSI 5000/5100 DO Laboratory Benchtop Meters

Easily conduct DO, BODs or OUR/SOUR tests.

Accurate, reliable YSI benchtop dissolved oxygen instruments for the laboratory. Easily conduct DO, BODs or OUR/SOUR tests. Both instruments feature: auto-calibration, large, graphic displays and low keypad profiles for maximum efficiency.

YSI 3200 Conductivity Meter

YSI 3200 Conductivity Meter

Laboratory Conductivity, Resistivity, Salinity, TDS

The YSI 3200 is an innovative instrument that offers unmatched accuracy for ultrapure water analysis, multipoint calibration, and a high/low alarm for process applications.

YSI TruLine Nitrate Electrode Kit

YSI TruLine Nitrate Electrode Kit

Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high (1000 mg/L) standard.

Each TruLine ISE features an integrated reference. This eliminates the need for a separate reference half-cell when measuring ion concentration and is more convenient. Each ISE can be refilled with reference/electrode filling solution, extending the life of each ISE. The electrodes also feature a double-junction reference for optimum performance in the lab.

YSI Science pHT-G

YSI Science pHT-G pH Electrode

Double Junction, 3 in 1, ground joint junction, 170 mm length, micro electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI Science pHT-Micro

YSI Science pHT-Micro pH Electrode

Double Junction, 3 in 1, Platinum junction, 170 mm length, micro electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI TruLine pH 27

YSI TruLine pH 27 Electrode

Single Junction, combination, flat glass membrane, glass shaft

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI IoLine Micro - 3 in 1

YSI IoLine Micro 3 in 1 pH Electrode

3 in 1, pH electrode, Triple Junction, Iodine/Iodide reference, 3 in 1, Refillable, Micro electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI TruLine Ammonia Electrode Kit

YSI TruLine Ammonia Electrode Kit

Ammonia ISE range: 0.02 to 17000 mg/L

Each TruLine ISE features an integrated reference. This eliminates the need for a separate reference half-cell when measuring ion concentration and is more convenient. Each ISE can be refilled with reference/electrode filling solution, extending the life of each ISE. The electrodes also feature a double-junction reference for optimum performance in the lab.

YSI IoLine - 3 in 1

YSI IoLine 3 in 1 pH Electrode

Triple Junction, self-flushing platinum junction, Iodine/Iodide reference, 3 in 1, refillable

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI ProOBOD Optical BOD Probe

YSI ProOBOD Optical BOD Probe

Designed for use with the YSI ProODO Instrument

The ProOBOD® self-stirring optical BOD probes are designed to fit into standard 300 mL BOD bottles with an international version also available for use with other tapers.

YSI EcoSense BOD Probe

YSI EcoSense BOD Probe

Self-stirring BOD Probe

Self-stirring laboratory BOD probe for use with the EcoSense DO200 or DO200A.
Includes external power adapter and 5908 Cap Membrane Kit (1.25 Mil PE membranes).

EXO Conductivity & Temperature Smart Sensor

YSI EXO Conductivity & Temperature Smart Sensor

Improved range of conductivity and increased accuracy of temperature sensors to better address oceanographic challenges

Note: This product is intended for sampling and profiling applications.
This sensor must be installed into an EXO Sonde to function (EXO1 | EXO2). Does not function on its own.

For long-term monitoring in fouling environments, please see our Wiped (C/T) sensor for the EXO2 platform.

EXO pH & ORP Smart Sensor

YSI EXO pH & ORP Smart Sensor

Guarded, digital smart sensor featuring welded titanium construction and wet-mateable connectors

The EXO guarded pH & ORP sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

EXO pH & ORP Sensor Replacement Module

YSI EXO pH & ORP Sensor Replacement Module

Guarded pH/ORP Module

User-replaceable tip for #599705 - EXO guarded pH/ORP sensor

EXO Turbidity Smart Sensor

YSI EXO Turbidity Smart Sensor

Optical Sensor

The EXO turbidity sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

EXO Total Algae PC Smart Sensor

YSI EXO Total Algae PC Smart Sensor

Phycocyanin - Freshwater

The EXO total algae PC sensor is a digital smart sensor (chlorophyll & phycocyanin) featuring welded titanium construction and wet-mateable connectors optimized for freshwater use. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

EXO Optical Dissolved Oxygen Smart Sensor

YSI EXO Optical Dissolved Oxygen Smart Sensor

Optical Sensor

The EXO optical dissolved oxygen sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

EXO fDOM Smart Sensor

YSI EXO fDOM Smart Sensor

Fluorescent Dissolved Organic Matter

The EXO fDOM (fluorescent dissolved organic matter) sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive KOR interface software.

6150 ROX Dissolved Oxygen Sensor

YSI 6150 ROX Dissolved Oxygen Sensor

Luminescent-based dissolved oxygen sensor

The YSI 6150 Reliable Oxygen Sensor (ROX) is a luminescent-based DO sensor that provides accurate long-term measurements in severe fouling and low oxygen environments.

6131 Blue-Green Algae Sensor

YSI 6131 Blue-Green Algae Sensor

Monitors algal populations at natural levels in freshwater

The YSI 6131 blue-green algae sensor monitors algal populations at natural levels in freshwater, providing an early warning for bloom conditions.

6025 Chlorophyll Sensor

YSI 6025 Chlorophyll Sensor

Designed to for the 6-Series sonde to estimate phytoplankton concentrations

Predict algae blooms and determine the nutrient loading in water with the YSI 6025 Chlorophyll Sensor.

6136 Turbidity Sensor

YSI 6136 Turbidity Sensor

Fouling resistant turbidity sensor for 6-Series water quality sondes.

The YSI 6136 Turbidity Probe is a fouling-resistant, wiped sensor designed to seamlessly integrate - using no external interface hardware - with all YSI sondes that contain an optical port. The YSI 6136 provides accurate, in situ measurement of turbidity in fresh, brackish, and sea water, as well as other applications requiring highly accurate turbidity data.

6560 Temperature/Conductivity Sensor

YSI 6560 Temperature/Conductivity Sensor

For use with a 6-Series Sonde

Stable multi-probe measures conductivity and temperature levels and calculates salinity values. Thermistor readings are used to temperature-correct other parameter measurements.

6589 Fast-Response pH Sensor

YSI 6589 Fast-Response pH Sensor

For use with the 6-Series Sonde

Simple, accurate pH measurement in sensors designed for minimal maintenance in sampling, profiling, and long-term monitoring applications.

6425AF Anti-Fouling Chlorophyll Sensor

YSI 6425AF Anti-Fouling Chlorophyll Sensor

For use with the 6-Series Sonde

Predict algae blooms and determine the nutrient loading in water with the YSI 6425AF Chlorophyll Sensor.

6431AF Anti-Fouling Blue-Green Algae Sensor

YSI 6431AF Anti-Fouling Blue-Green Algae Sensor

For use with the 6-Series Sonde

The YSI 6431AF blue-green algae sensor monitors algal populations at natural levels in freshwater, providing an early warning for bloom conditions.

6436AF Anti-Fouling Turbidity Sensor

YSI 6436AF Anti-Fouling Turbidity Sensor

Anti-fouling turbidity sensor for 6-Series water quality sondes.

Copper-based parts on the YSI 6436AF Turbidity Sensor repel aquatic growth on sensors, extending deployment periods.
The YSI 6436AF Turbidity Probe is an anti-fouling, wiped sensor designed to seamlessly integrate - using no external interface hardware - with all YSI sondes that contain an optical port. The YSI 6136 provides accurate, in situ measurement of turbidity in fresh, brackish, and sea water, as well as other applications requiring highly accurate turbidity data.

6450AF Anti-Fouling Dissolved Oxygen Sensor

YSI 6450AF Anti-Fouling Dissolved Oxygen Sensor

For use with the 6-Series sonde

The YSI 6450AF anti-fouling DO sensor is a luminescent-based DO sensor that provides accurate long-term measurements in severe fouling and low oxygen environments.

910 COD Colorimeter

YSI 910 COD Colorimeter

Rugged, waterproof, single parameter instrument for the measurement of COD - Chemical Oxygen Demand

The YSI 910 COD colorimeter is ideal for any application. This portable instrument allows you to easily take readings for COD.

EXO Field Cable

YSI EXO Field Cable

Designed to connect the EXO Handheld Display to the EXO sondes

EXO field cables feature rugged wet-mate connectors and are designed to connect the EXO Handheld Display to the EXO sondes. Comes in a variety of lengths to support specific application needs.

EXO Replaceable DO Sensor Cap

YSI EXO Dissolved Oxygen Sensor Cap Replacement Kit

Replaceable DO Sensor Cap

Replacement sensor cap for EXO Optical Dissolved Oxygen Sensor.
Includes hydrating cap and quick start guide.

EXO Rechargeable Lithium-Ion Battery

YSI EXO Rechargeable Lithium-Ion Battery

For EXO Handheld Display

This rechargeable Lithium-Ion battery pack allows users to power the EXO Handheld without the need to swap out batteries. Provides a full day of field use on a single charge.
Includes wall charger with user-swappable international plugs and one rechargeable battery pack.

EXO1 Hard Sided Wheeled Carrying Case

YSI EXO1 Hard Sided Wheeled Carrying Case

To be used with EXO1 Multiparameter Sonde

The perfect solution for protecting your sonde and accessories while out of the water. Includes space for one EXO1 sonde, cables/adapters, sensors, and some accessories.

PAR - Photosynthetically Active Radiation

YSI PAR System - Photosynthetically Active Radiation

Integrated Li-Cor PAR sensors with 6600 Sondes

YSI offers several PAR systems that can be directly integrated into existing or new 6600 multiparameter sondes. PAR sensors are powered by the sonde and PAR data is added to the data stream of the water quality sonde.

Cap Membrane Kit 1.00 Mil Teflon

YSI Cap Membrane Kit 1.00 Mil Teflon

YSI 5906 screw-on cap dissolved oxygen membranes.

Includes bottle of electrolyte, 1 sanding disc, and 6 screw-on cap membranes. 1.00 Mil FEP Fluoropolymer film membranes. Black cap.

YSI pH Buffer

YSI pH Buffer

Various pH buffers for pH probe calibration.

Choose between pH, 4, 7, and 10 buffer solutions.
Each buffer case contains 6 individual pints (plastic). Buffer cases are available with a single buffer type or with an assortment of buffers (2 pints of pH 4, 7, and 10 buffers).

YSI Conductivity Calibrator Solution

YSI Conductivity Calibrator Solution

Calibrate both field instruments and lab instruments and cells together for maximum accuracy

NIST-traceable conductivity solutions to calibrate both field instruments and lab instruments and cells together for maximum accuracy

YSI Turbidity Standard

YSI Turbidity Standard

Extremely accurate and stable solutions.

YSI turbidity solutions calibrate your instruments for maximum accuracy. Extremely accurate and stable solutions.

YSI Zobell Solution ORP Calibrator

YSI Zobell Solution ORP Calibrator

Used for calibrating ORP/Redox

YSI 3682 Zobell solution is used for calibrating ORP/Redox on several YSI instruments.

YSI 5580 Confidence Solution

YSI 5580 Confidence Solution

Case includes 6 plastic bottles (1 pint each).

Never worry about the accuracy of your pH, ORP, or conductivity data again! Ensure probe performance with the 5580 Confidence Solution®.

YSI Anti-Fouling C-Spray

YSI Anti-Fouling C-Spray

Non-Toxic Biofouling Inhibitor

Anti-fouling nanopolymer coating that inhibits biofouling attachment on conductivity-temperature probes and other sensors and water quality instruments. 100 mL bottle.

YSI Anti-Fouling Copper Tape

YSI Anti-Fouling Copper Tape

For use with any sonde or long term deployment sensor

Copper tape for water quality sondes and sensors provides biofouling protection and extends deployments.

YSI EXO1 Anti-Fouling Guard

YSI EXO1 Anti-Fouling Guard

Copper-alloy guard

This copper-alloy sonde guard for the EXO1 protects water quality sensors and provide bio-fouling protection.
The copper construction naturally resists fouling agents in the water and prevents organisms from attaching to the guard.

YSI EXO Probe and Sonde Protective Sleeves

YSI EXO Probe and Sonde Protective Sleeves

Antifouling sleeves for long-term deployments in high fouling environments.

These protective probe and sonde sleeves incase your equipment in an extra layer of protection. Fouling that attaches to this sleeve can be easily removed by simply cutting off and disposing of the sleeve.

YSI EXO DCP Signal Output Adapter 2.0

YSI EXO DCP Signal Output Adapter 2.0

Converts an EXO sonde signal into either SDI-12 or RS-232.

This adapter converts an EXO sonde signal into either SDI-12 or RS-232. 
For SCADA applications, please see our EXO Modbus Adapter.
Note: This product is intended for use in a long term monitoring system. Requires an EXO Sonde, data logger, and flying lead cable to function.

EXO Modbus Signal Output Adapter

YSI EXO Modbus Signal Output Adapter

Converts an EXO sonde signal into a Modbus protocol over RS-232 or RS-485.

This adapter converts an EXO sonde signal into a Modbus protocol over RS-232 or RS-485.
For DCP applications with a data logger, please see our EXO DCP Adapter.
Note: This product is intended for use in a long term monitoring system. Requires an EXO Sonde, data logger, and flying lead cable to function.

Buoy - Vertical Profiling System

YSI 6952 Buoy - Vertical Profiling System

Designed for coastal applications or high energy environments

The YSI 6952 Buoy - Vertical Profiling System offers user-programmable sample intervals, redundant error recovery logic that detects unexpected activity and recovers automatically, and is compatible with all YSI EXO and 6-Series sondes equipped with depth.

YSI multiparameter sensor rhodamine probe

YSI 6-Series 6130 Rhodamine sensor

YSI 6-Series Rhodamine sensor. Accurate, in situ measurement of Rhodamine in a robust, self-cleaning sensor.

YSI 6-Series Rhodamine sensor. Accurate, in situ measurement of Rhodamine in a robust, self-cleaning sensor.

ysi-turner-hydrocarbons-sensor adaptor

YSI Turner hydrocarbons Sensor Adapter (TSA)

YSI 6-Series oil in water sensor adapter kit. Add hydrocarbon sensing to 6600V2 water quality sondes.

The YSI Turner Sensor Adapter (TSA) expands water quality monitoring to include third-party analog output sensors. In addition to monitoring for the standard water quality parameters of Temperature, Conductivity, pH, Dissolved Oxygen, Turbidity, Blue-Green Algae, and Chlorophyll, 6-Series customers can now measure hydrocarbons and other parameters from the Turner Cyclops-7® submersible sensor line.

Storm Central Cloud Hosted Data Solution

YSI Storm Central

Storm Central cloud data hosting service for mobile and satellite communications.

WaterLOG® Storm Central is a cloud hosted solution that allows you to view and download data from any computer or mobile device with an Internet connection. Data from the data logger is pushed to Storm Central on regularly scheduled intervals. Analyzing near real-time data is made simple in graphical, as well as tabular format. This platform provides an easy-to-use, simple approach for remote hydrological and meteorological data collection.

Click here to view real-time data.

650 MDS Multi-Parameter Display System

YSI 650 MDS Multiparameter Display System

Data display and logging system, interfaces with any YSI sonde

Log real-time data, calibrate YSI 6-Series sondes, set-up sondes for deployment, and upload water quality data to a PC with the feature-packed YSI 650MDS (Multiparameter Display System). Designed for reliable field use, this display and data logger features a waterproof IP-67, impact-resistant case.

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YSI ProSample Autosampler

The NEW ProSample series of fully automated portable samplers

The NEW ProSample series of fully automated portable samplers expand our process monitoring and control equipment offering. These lightweight and easy to use samplers come with a proprietary peristaltic pump for highly accurate sampling based on time, flow, or event. The ProSample series has extremely high volume accuracy to keep your facility in compliance.  The ProSample series is most commonly used in stormwater and storm event sampling, influent and effluent wastewater treatment, collection systems for industrial pre-treatment and any time based sampling requirements. The ProSample series provides a unique combination of design and technology.