Water Quality Handheld Sampling Meters

The right tool for every water professional.

The industry-leading YSI Professional Series handheld systems are trusted around the world and known for their field durability, ease of use, and—most importantly—providing reliable water quality data. Pro Series systems are available in a variety of parameter configurations, enabling you to choose the perfect instrument for your application!

Pro Series features

water quality sampling handheld durability

Durability

  • Military-spec cable connectors
  • IP-67 waterproof
  • Rubber over-molded casing and drop rated to 1 meter

ease of use water quality sampling handheld

Ease-of-Use

  • User-replaceable sensor and cables
  • High-visibility backlit display
  • Intuitive, menu-driven interface

reliable water quality sampling handheld meter

Reliable Data

  • Smart calibration
  • Optical or electrochemical DO
  • 3-year instrument warranty; 2-year cable warranty

Applications

water quality sampling applications

Pro Series Handhelds

Use the tabs below to learn more about our different types of water quality handhelds.

Multiparameter Handhelds

prodss water quality sampling

ProDSS

Ultimate multiparameter sampling

The ProDSS is a multiparameter handheld with customizable features and proven quality and reliability in a diverse range of sampling applications. Connect any four smart sensors for unparalleled performance, including optical dissolved oxygen, turbidity, and Total Algae. Optional GPS and depth sensors allow for even more comprehensive data.

Top Features

  • ProDSS 4-port cable assembly: combine any four ProDSS sensors on a single cable assembly
  • Durable, titanium welded sensors
  • Calibration data saved in the sensor
  • 2-year warranty on sensors
  • Optional Depth
  • Optional GPS
  • Single-point or continuous logging modes
  • EPA-approved methodology for compliance reporting of BOD, CBOD, DO, and pH
  • Cable lengths up to 100 m
  • Data management through Kor Software
  • Rechargeable battery
  • 100,000+ data set memory

prodss multiparameter water quality meter

ProDSS Parameter Options

1Only available as a ProDSS sensor

  • Specific Conductance2
  • Salinity2
  • Total Dissolved Solids (TDS)2
  • Resistivity2
  • Seawater Density
  • Total Suspended Solids (TSS)
  • Depth

2Derived parameter

3Included in Handheld

Shop ProDSS

water quality handheld meter proquatro

ProQuatro

Powerful multiparameter sampling in an economical package

The ProQuatro offers a cost-effective solution for multiparameter water quality sampling. For efficient measurements, combine temperature, conductivity, galvanic or polarographic DO, and your choice of two ISEs (pH, ORP, ammonium, chloride, or nitrate) with the 4-port Quatro cable.

Top Features

  • 4-port Quatro cable: combine four analog sensors on a single cable assembly
  • Galvanic or polarographic dissolved oxygen
  • Self-stirring BOD probe option for the laboratory
  • EPA-approved methodology for compliance reporting of BOD, CBOD, DO, and pH
  • Cable lengths up to 30 m
  • Single-point or continuous logging modes
  • 4 ProQuatro kits offered
    • Choose between galvanic or polarographic dissolved oxygen
  • 5,000 data set memory

multiparameter water quality meter

ProQuatro Parameter Options

1Derived parameter

  • Specific Conductance2
  • Salinity2
  • Total Dissolved Solids (TDS)2
  • Resistivity2
  • Ammonium / Ammonia

2Included in Cable

  • Chloride
  • Nitrate
  • Temperature2

Shop ProQuatro

Looking for unattended monitoring? YSI’s EXO Sondes use the same smart sensor technology built for long-term monitoring.

exo 3 water monitoring sonde

Dissolved Oxygen Handhelds

dissolved oxygen meters

ProSolo

Optical Dissolved Oxygen

The ProSolo is designed for easy, portable dissolved oxygen measurements. It utilizes YSI’s reliable Optical Dissolved Oxygen (ODO) technology and can be used with a field probe or BOD-style probe.

Top Features

  • Single-cable assemblies:
    • ODO/Temperature
    • ODO/Conductivity/Temperature
    • OBOD with Temperature for the laboratory
  • EPA-approved methodology for compliance reporting of BOD, CBOD, and DO
  • Field cable lengths up to 100 m
  • Data management through Kor Software
  • Rechargeable battery
  • 100,000+ data set memory

Shop ProSolo

optical dissolved oxygen water quality meter

Pro20

Electrochemical Dissolved Oxygen

The Pro20 portable dissolved oxygen meter uses membrane-covered electrochemical sensors for a reliable, lower-cost alternative to optical-based sensors. Like the ProSolo, the Pro20 is available with a field probe and/or a BOD-style probe.

Top Features

  • Replaceable electrodes
  • Choice of galvanic or polarographic DO electrode
  • BOD/Temperature probe for the laboratory
  • Easy to replace cap membranes
  • EPA-approved methodology for compliance reporting of BOD, CBOD, and DO
  • One Touch Cal feature calibrates DO in seconds
  • 50 data set memory

Shop Pro20

dissolved oxygen meter

Looking to integrate an optical DO sensor into a PLC or data logger through Modbus communication? Check out YSI’s ODO RTU sensors.

odortu

Single-Sensor Handhelds

single parameter water quality meters

Pro10

pH, ORP

The Pro10 provides everything you need in a handheld instrument to measure pH, ORP, or both.

Top Features

  • Choice of either:
  • Optional amplified pH sensor for cold or low ionic strength water
  • Automatic pH buffer recognition
  • 50 data set memory

Shop Pro10

ph orp meter

Pro30

Conductivity, Salinity, TDS

The Pro30 provides accurate and reliable conductivity, salinity, TDS, and temperature data through a stable, 4-electrode conductivity cell.

Top Features

  • Conductivity cell built into the 2-year cable warranty
  • Easy cleaning of the conductivity cell
  • Salinity and TDS measurements calculated from conductivity
  • Integrated temperature sensor
  • 50 data set memory

Shop Pro30

conductivity salinity tds meter

multiparameter water quality meter proswap

ProSwap

Swap between ProDSS sensors

The ProSwap handheld has a 1-port cable design with swappable sensors, allowing you to focus on the parameter needed for your application.

Top Features

  • Single-sensor cable design for interchangeability with any ProDSS sensor
  • Built-in thermistor
  • Calibration data saved in the sensor
  • Durable, titanium welded sensors
  • Optional Depth
  • Optional GPS
  • Single-point or continuous logging modes
  • Cable lengths up to 100 m
  • Data management through Kor Software
  • Rechargeable battery
  • 100,000+ data set memory

multiparameter water quality meter

ProSwap Parameter Options

1Only available as a ProDSS sensor

  • Specific Conductance2
  • Salinity2
  • Total Dissolved Solids (TDS)2
  • Resistivity2
  • Seawater Density
  • Total Suspended Solids (TSS)
  • Depth

2Derived parameter

3Included in Cable.
4Included in Handheld.

Shop ProSwap

Dual-Sensor Handhelds

dual sensor water quality handheld meters

Pro1020

pH & Dissolved Oxygen

The Pro1020 combines features of the Pro Series pH and electrochemical dissolved oxygen sensors for dual-sensor measurement.

Top Features

  • Choice of either:
  • Optional amplified pH sensor for cold or low ionic strength water
  • Automatic pH buffer recognition
  • Easy to replace membranes
  • Integrated temperature sensor
  • 50 data set memory

Shop Pro1020

ph orp dissolved oxygen meter

Pro1030

pH & Conductivity

The Pro1030 combines the features of the Pro Series pH or ORP and conductivity sensors for dual-sensor measurement.

Top Features

  • Choice of either pH or ORP sensor
  • Optional amplified pH sensor for cold or low ionic strength water
  • Automatic pH buffer recognition
  • Conductivity cell built into the 2-year cable warranty
  • Easy cleaning of the conductivity cell
  • Salinity and TDS measurements calculated from conductivity
  • Integrated temperature sensor
  • Easy to replace membranes
  • 50 data set memory

Shop Pro1030

ph conductivity meter

Pro2030

Dissolved Oxygen & Conductivity

The Pro2030 is the ideal handheld for those who require automatic salinity compensation for dissolved oxygen. It combines features of the Pro Series membrane-covered dissolved oxygen and conductivity sensors for dual-sensor measurement.

Top Features

  • Choice of either galvanic or polarographic dissolved oxygen
  • Easy to replace membranes
  • Conductivity cell built into the 2-year cable warranty
  • Easy cleaning of the conductivity cell
  • Salinity and TDS measurements calculated from conductivity
  • Integrated temperature sensor
  • 50 data set memory

Shop Pro2030

dissolved oxygen conductivity meter

Multiparameter Handhelds

prodss water quality sampling

ProDSS

Ultimate multiparameter sampling

The ProDSS is a multiparameter handheld with customizable features and proven quality and reliability in a diverse range of sampling applications. Connect any four smart sensors for unparalleled performance, including optical dissolved oxygen, turbidity, and Total Algae. Optional GPS and depth sensors allow for even more comprehensive data.

Top Features

  • ProDSS 4-port cable assembly: combine any four ProDSS sensors on a single cable assembly
  • Durable, titanium welded sensors
  • Calibration data saved in the sensor
  • 2-year warranty on sensors
  • Optional Depth
  • Optional GPS
  • Single-point or continuous logging modes
  • EPA-approved methodology for compliance reporting of BOD, CBOD, DO, and pH
  • Cable lengths up to 100 m
  • Data management through Kor Software
  • Rechargeable battery
  • 100,000+ data set memory

prodss multiparameter water quality meter

ProDSS Parameter Options

1Only available as a ProDSS sensor

  • Specific Conductance2
  • Salinity2
  • Total Dissolved Solids (TDS)2
  • Resistivity2
  • Seawater Density
  • Total Suspended Solids (TSS)
  • Depth

2Derived parameter

3Included in Handheld

Shop ProDSS

water quality handheld meter proquatro

ProQuatro

Powerful multiparameter sampling in an economical package

The ProQuatro offers a cost-effective solution for multiparameter water quality sampling. For efficient measurements, combine temperature, conductivity, galvanic or polarographic DO, and your choice of two ISEs (pH, ORP, ammonium, chloride, or nitrate) with the 4-port Quatro cable.

Top Features

  • 4-port Quatro cable: combine four analog sensors on a single cable assembly
  • Galvanic or polarographic dissolved oxygen
  • Self-stirring BOD probe option for the laboratory
  • EPA-approved methodology for compliance reporting of BOD, CBOD, DO, and pH
  • Cable lengths up to 30 m
  • Single-point or continuous logging modes
  • 4 ProQuatro kits offered
    • Choose between galvanic or polarographic dissolved oxygen
  • 5,000 data set memory

multiparameter water quality meter

ProQuatro Parameter Options

1Derived parameter

  • Specific Conductance2
  • Salinity2
  • Total Dissolved Solids (TDS)2
  • Resistivity2
  • Ammonium / Ammonia

2Included in Cable

  • Chloride
  • Nitrate
  • Temperature2

Shop ProQuatro

Dissolved Oxygen Handhelds

dissolved oxygen meters

ProSolo

Optical Dissolved Oxygen

The ProSolo is designed for easy, portable dissolved oxygen measurements. It utilizes YSI’s reliable Optical Dissolved Oxygen (ODO) technology and can be used with a field probe or BOD-style probe.

Top Features

  • Single-cable assemblies:
    • ODO/Temperature
    • ODO/Conductivity/Temperature
    • OBOD with Temperature for the laboratory
  • EPA-approved methodology for compliance reporting of BOD, CBOD, and DO
  • Field cable lengths up to 100 m
  • Data management through Kor Software
  • Rechargeable battery
  • 100,000+ data set memory

optical dissolved oxygen water quality meter

Shop ProSolo

Pro20

Electrochemical Dissolved Oxygen

The Pro20 portable dissolved oxygen meter uses membrane-covered electrochemical sensors for a reliable, lower-cost alternative to optical-based sensors. Like the ProSolo, the Pro20 is available with a field probe and/or a BOD-style probe.

Top Features

  • Replaceable electrodes
  • Choice of galvanic or polarographic DO electrode
  • BOD/Temperature probe for the laboratory
  • Easy to replace cap membranes
  • EPA-approved methodology for compliance reporting of BOD, CBOD, and DO
  • One Touch Cal feature calibrates DO in seconds
  • 50 data set memory

dissolved oxygen meter

Shop Pro20

Single-Sensor Handhelds

single parameter water quality meters

Pro10

pH, ORP

The Pro10 provides everything you need in a handheld instrument to measure pH, ORP, or both.

Top Features

  • Choice of either:
  • Optional amplified pH sensor for cold or low ionic strength water
  • Automatic pH buffer recognition
  • 50 data set memory

Shop Pro10

ph orp meter

Pro30

Conductivity, Salinity, TDS

The Pro30 provides accurate and reliable conductivity, salinity, TDS, and temperature data through a stable, 4-electrode conductivity cell.

Top Features

  • Conductivity cell built into the 2-year cable warranty
  • Easy cleaning of the conductivity cell
  • Salinity and TDS measurements calculated from conductivity
  • Integrated temperature sensor
  • 50 data set memory

Shop Pro30

conductivity salinity tds meter

multiparameter water quality meter proswap

ProSwap

Swap between ProDSS sensors

The ProSwap handheld has a 1-port cable design with swappable sensors, allowing you to focus on the parameter needed for your application.

Top Features

  • Single-sensor cable design for interchangeability with any ProDSS sensor
  • Built-in thermistor
  • Calibration data saved in the sensor
  • Durable, titanium welded sensors
  • Optional Depth
  • Optional GPS
  • Single-point or continuous logging modes
  • Cable lengths up to 100 m
  • Data management through Kor Software
  • Rechargeable battery
  • 100,000+ data set memory

multiparameter water quality meter

ProSwap Parameter Options

1Only available as a ProDSS sensor

  • Specific Conductance2
  • Salinity2
  • Total Dissolved Solids (TDS)2
  • Resistivity2
  • Seawater Density
  • Total Suspended Solids (TSS)
  • Depth

2Derived parameter

3Included in Cable. 4Included in Handheld.

Shop ProSwap

Dual-Sensor Handhelds

dual sensor water quality handheld meters

Pro1020

pH & Dissolved Oxygen

The Pro1020 combines features of the Pro Series pH and electrochemical dissolved oxygen sensors for dual-sensor measurement.

Top Features

  • Choice of either:
  • Optional amplified pH sensor for cold or low ionic strength water
  • Automatic pH buffer recognition
  • Easy to replace membranes
  • Integrated temperature sensor
  • 50 data set memory

ph orp dissolved oxygen meter

Shop Pro1020

Pro1030

pH & Conductivity

The Pro1030 combines the features of the Pro Series pH or ORP and conductivity sensors for dual-sensor measurement.

Top Features

  • Choice of either pH or ORP sensor
  • Optional amplified pH sensor for cold or low ionic strength water
  • Automatic pH buffer recognition
  • Conductivity cell built into the 2-year cable warranty
  • Easy cleaning of the conductivity cell
  • Salinity and TDS measurements calculated from conductivity
  • Integrated temperature sensor
  • Easy to replace membranes
  • 50 data set memory

ph conductivity meter

Shop Pro1030

Pro2030

Dissolved Oxygen & Conductivity

The Pro2030 is the ideal handheld for those who require automatic salinity compensation for dissolved oxygen. It combines features of the Pro Series membrane-covered dissolved oxygen and conductivity sensors for dual-sensor measurement.

Top Features

  • Choice of either galvanic or polarographic dissolved oxygen
  • Easy to replace membranes
  • Conductivity cell built into the 2-year cable warranty
  • Easy cleaning of the conductivity cell
  • Salinity and TDS measurements calculated from conductivity
  • Integrated temperature sensor
  • 50 data set memory

dissolved oxygen conductivity meter

Shop Pro2030

water quality sampling

Who’s minding the planet?

We believe in our customers' mission to protect the environment. Pro Series handhelds are designed with high-grade materials that extend their lifetime, cutting down on replacement parts and downtime.

The YSI factory is ISO 14002 certified and recognized by the Ohio EPA for environmental stewardship. Our facility is powered by 95% renewable energy and Xylem is ranked in the top 10 of Barron’s 100 Most Sustainable Companies.

water quality meter selector guide

Still not sure which handheld is right for you?

Please contact us and we’ll make sure the system you order is right for your application.

Need More Information? Ask A Question

Featured Products

Additional Resources

proseries handheld selector

Selecting Your Pro Series Water Quality System

How to Select a Handheld Dissolved Oxygen Meter

YSI ProQuatro vs ProDSS | Key Differences to Consider

mission water