Water Quality System (WQS)
Field & Laboratory Meters
  • pH, SCT, DO & BOD, Multi-parameter Testing
Environmental Monitoring Systems (EMS)
Multi-parameter Water Quality Sondes
  • Sampling, Logging& Profiling

Integrated Systems & Services (ISS)
Environmental Monitoring Modules
  • Buoy& Floating Platforms, Profiling Systems, EcoMapper AUV

WQS_Handheld Field Instrument

ProDSS Digital Sampling System Multiparameter​ Handheld



What are they all talking about? The new YSI ProDSS - digital sampling system

The YSI ProDSS (digital sampling system) is a portable water quality multiparameter instrument for the measurement of several critical parameters - dissolved oxygen (optical), turbidity, pH, ORP, conductivity, specific conductance, salinity, TDS, resistivity, TSS, ammonium, ammonia, chloride, nitrate, depth (optional), temperature and GPS coordinates.

Designed for use in applications such as surface water, groundwater, coastal/estuarine, and aquaculture, the rugged and reliable ProDSS allows for the measurement of water quality parameters with digital sensors. The ProDSS uses smart, user-replaceable sensor technology that can be connected in any port and automatically recognized by the handheld while retaining the calibration data.

An easy-to-read backlit color display, large memory capacity, simple calibration procedures, rechargeable battery and powerful data management program (KorDSS) all help to make your sampling experience more convenient.

The optional GPS and depth along with a wide range of cables and sensors (sold separately) allows for complete customization of the ProDSS. Military spec connectors, IP67 waterproof, rubber over-molded case and 1-meter drop tests ensures durability to provide years of sampling even in the harshest field conditions.

Parameters Available:

  • pH
  • Oxidation Reduction Potential (ORP)/Redox
  • Optical Dissolved Oxygen/BOD
  • Turbidity
  • Conductivity
  • Specific Conductance
  • Salinity 
  • Total Dissolved Solids (TDS)
  • Resistivity
  • Seawater Density
  • Total Suspended Solids (TSS)
  • Ammonium
  • Ammonia
  • Chloride
  • Nitrate
  • Depth
  • Temperature

There are multiple features of the ProDSS:

  • Digital smart sensors are automatically recognized by the instrument and store calibration data
  • User-replaceable cables and sensors
  • KorDSS software (included) and USB on-the-go connector assist with data management
  • Rechargeable lithium-ion battery
  • Color display and backlit keypad; menu-driven operation
  • Long-life lithium-ion battery; ensures reliability and minimizes waste
  • Optional GPS
  • Optional depth sensor and up to 100-m cable lengths
  • Large memory (>100,000 data sets) with extensive site list capabilities
  • Multiple languages: English, Spanish, Portuguese, French, German, Italian, Japanese, Norwegian, and Chinese
  • Military spec connectors, waterproof IP67 rating and rubber over-molded case
  • 3 year instrument warranty; 2 year cable warranty (sensor warranties vary)

The ProDSS will also work with YSI ProODO sensor/cable assemblies to provide a DO only instrument. It's also capable of using the ProOBOD optical BOD probe for use in the lab for BOD measurements.



Note: A conductivity/temperature sensor (626902) must be installed in a ProDSS cable for accurate measurement ofall parameters. All sensors, including conductivity/temperature, must be ordered separately.

All ProDSS instruments include a rechargeable lithium-ion battery (pre-installed), hand strap, USB cable for charging the ProDSS battery and for connection to a PC, universal AC charger, cable for connection to a USB memory stick, ProDSS quick start guide, and USB memory stick containing KorDSS software and digital copy of the comprehensive manual.


Yes, optical BOD probe for the lab is available 

Buffer Recognition:              

Yes, auto-buffer recognition for USA (4.00, 7.00, 10.00) and NIST (4.01, 6.86, 9.18) buffer  sets.  Calibration values are automatically compensated for temperature for both buffer sets.


FCC, 1-meter drop test, Assembled in USA, CE, WEEE, RoHS, IP-67, UN Part III Section  38.3 test methods for lithium-ion batteries (class 9)

Connectivity / Communications:

Built-in micro USB On-The-Go port for PC connection, recharging/powering the ProDSS  and connecting directly to a USB stick


MS (military spec) waterproof with quarter-turn bayonet lock (unsurpassed in regards to  durability)

Data Management:

KorDSS desktop PC software (included), >100,000 data sets

Desktop Software Compatible:

KorDSS desktop PC software (included)

Digital / Digital Sensors:


Flow Cell:

Yes, flow cell is available

GLP Compliance:

Yes, detailed GLP information is stored and is available to view, download or print


Optional internal GPS, coordinates are stored with measurement data and site lists

Graphic Display:

Backlit keypad, Color, LCD graphic display


German, Italian, Chinese (Simplified & Traditional), French, Norwegian, English,  Japanese, Spanish, Portuguese

Logging Capabilities:

Single point or Continuous, Yes

Measurement Method / Channels:



>100,000 data sets, 400 GLP files



Operating Temperature:

0 to 50°C (32 to 122°F)

Parameters Measured:

Dissolved Oxygen (%), Dissolved Oxygen (mg/L), Temperature, Turbidity, Conductivity,  Specific Conductance, Resistivity, Salinity, Water Density, pH, ORP, Ammonium, Nitrate,  Chloride, Total Dissolved Solids (TDS),  Total Suspended Solids (TSS), Depth, Barometer

Size Instrument: 

8.3 cm width x 21.6 cm length x 5.6 cm depth (3.27 in x 8.5 in x 2.21 in)
Warranty: 3-year instrument; 2-year bulkhead, cable assembly, and sensors; 1-year pH and pH/ORP sensor modules, ODO (opticalDO) sensor caps, and Li-Ion battery pack; 6-months ammonium, nitrate, and chloride sensor modules


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