YSI ProDSS Handheld Multiparameter Water Quality Meter

A revolution in handheld sampling and profiling

The YSI ProDSS (digital sampling system) handheld multiparameter meter provides extreme flexibility for the measurement of a variety of combinations for dissolved oxygen, turbidity, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature along with depth.


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The YSI ProDSS (digital sampling system) is a portable water quality multiparameter instrument for the measurement of several critical parameters – dissolved oxygen (optical), total algae, 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, aquaculture, and wastewater, the rugged and reliable ProDSS allows for the measurement of water quality parameters with digital sensors. The ProDSS uses smart sensor technology that allows sensors to be automatically recognized by the handheld while retaining 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, IP-67 waterproof rating, rubber over-molded case and 1-meter drop tests ensures durability to provide years of sampling even in the harshest field conditions.

Parameters Available:

  • Dissolved Oxygen (optical)
  • Turbidity
  • New! – Total Algae-Phycocyanin
  • New! – Total Algae-Phycoerythrin
  • pH
  • ORP/Redox
  • Conductivity
  • Specific Conductance
  • Salinity
  • Total Dissolved Solids (TDS)
  • Resistivity
  • Seawater Density
  • Total Suspended Solids (TSS)
  • Depth
  • GPS Coordinates
  • Ammonium
  • Ammonia
  • Chloride
  • Nitrate
  • Temperature
  • Barometric Pressure

There are multiple features of the ProDSS:

  • Single cable design with lengths up to 100 meters
  • User-replaceable cables provide versatility, reduce down time and reduce overall cost of ownership
  • 4 port cables feature user-replaceable sensors; universal ports can accept any 4 sensors; optional depth sensor available (with depth and no depth)
  • ODO/CT probe and cable assemblies feature integral (built-in) optical DO and conductivity sensors; rugged ODO sensor cap with 2-year warranty is pre-installed on new assemblies; kits with an ODO/CT assembly and a ProDSS handheld are available
  • Long-life rechargeable lithium-ion battery to power handheld and sensors
  • Color display and backlit keypad; menu-driven operation
  • Digital smart sensors are automatically recognized by the instrument and store calibration data
  • Large memory (>100,000 data sets) with extensive site list and Data ID tag capabilities
  • KorDSS software (included) and USB on-the-go connector assist with data management
  • Global positioning system (GPS) (optional)
  • Rugged, waterproof case (IP-67 rated) with rubber over-mold and metal, military-spec (MS) cable connectors as well as rugged titanium sensors
  • Multiple languages: English, Spanish, Portuguese, French, German, Italian, Japanese, Norwegian, Chinese (simplified and traditional), Korean, and Thai
  • 3 year instrument warranty; 2 year cable warranty (sensor warranties vary)

Not only have we answered our customers demands for a handheld instrument that can measure turbidity, the ProDSS can also measure depth (optional) in addition to pH, ORP, optical DO, conductivity, and GPS coordinates (optional).

There are many options when “building” a ProDSS instrument. In addition to the ProDSS 4 port cable and the ODO/CT probe and cable assembly, 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.

The ProDSS is a true field instrument. The titanium smart sensors (4 port cables) can easily be replaced in the field and our durable MS (Military Spec) locking bayonet-style cable connector ensures quick cable connection. A rugged and waterproof (IP-67) rubber over-molded instrument casing provides protection from the demands of field sampling.

Some sensors are EPA approved for drinking water and wastewater compliance reporting.

Cables and sensors are sold separately.

Note: A conductivity/temperature sensor (626902) must be installed in a ProDSS 4 port cable for accurate temperature compensation and measurement of all parameters except turbidity and TSS.

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 a digital copy of the user manual.

Ordering information:

Step 1:Order Instrument

Item # Description
626870-1 Instrument without GPS; includes rechargeable lithium-ion battery (pre-installed), hand strap, USB cable, universal AC adapter, micro USB to USB adapter cable, ProDSS quick start guide, and USB memory stick containing KorDSS software and digital copy of the entire manual
626870-2 Instrument with GPS; includes rechargeable lithium-ion battery (pre-installed), hand strap, USB cable, universal AC adapter, micro USB to USB adapter cable, ProDSS quick start guide, and USB memory stick containing KorDSS software and digital copy of the entire manual 

Step 2: Order Cable(s)

Cables do not include temperature sensor; all cables include 4 sensor ports and a maintenance kit (3 port plugs, tube of Krytox lubricant, brush for conductivity probe, syringe for depth sensor cleaning, and sensor installation/removal tool). A 1 lb weight is included with all cables 10 meters and longer
626909 No depth sensor; 1, 4, 10, 20, 30, 40, 50, 60, 70, 80, 90 or 100-meters (indicate cable length when ordering, example 626909-10 to indicate the 10-meter option)
626910 Depth sensor integrated; 1, 4, or 10-meters (indicate cable length when ordering, example 626910-4 to indicate the 4-meter option)
626911 Depth sensor integrated; 20, 30, 40, 50, 60, 70, 80, 90 or 100-meters (indicate cable length when ordering, example 626911-50 to indicate the 50-meter option)

Step 3: Order Digital, Smart Sensors

626900 digital, smart optical dissolved oxygen sensor
626901 digital, smart turbidity sensor
626902 digital, smart combination conductivity/temperature sensor (for highest accuracy always install a conductivity/temp sensor to compensate all measurement data for temp and DO data for conductivity)
626903 digital, smart pH sensor with replaceable module attached
626904 digital, smart combination pH/ORP sensor with replaceable module attached
626905 digital, smart nitrate sensor with replaceable module attached
626906 digital, smart ammonium sensor with replaceable module attached
626907 digital, smart chloride sensor with replaceable module attached

Step 4: Order Solutions

061320 ORP (mV) calibrator, Zobell solution, powder – needs hydrated (125 mL bottle)
608000 Turbidity standard, 0 FNU (1 gallon, 3.78 l)
607200 Turbidity standard, 12.4 FNU (1 gallon, 3.78 l)
607300 Turbidity standard, 124 FNU (1 gallon, 3.78 l)
607400 Turbidity standard, 1010 FNU (1 gallon, 3.78 l)
003841 Ammonium standard, 1 mg/L (500 mL)
003842 Ammonium standard, 10 mg/L (500 mL)
003843 Ammonium standard, 100 mg/L (500 mL)
003885 Nitrate standard, 1 mg/L (500 mL)
003886 Nitrate standard, 10 mg/L (500 mL)
003887 Nitrate standard, 100 mg/L (500 mL)
005580 Confidence Solution to verify pH, ORP and conductivity data (not for calibration)

Step 5: Order Accessories

626946 Large, hard sided carrying case 
603075 Large, soft-sided carrying case
626945 Small, hard-sided carrying case (1- and 4-meter cables)
599080 Flow cell
603056 Flow cell mounting spike
063507 Tripod (screws into back of meter)
063517 Ultra clamp (screws into back of meter)
603070 Shoulder strap
603069 Belt clip (screws into back of meter)
626942 USB car charger
626943 Small external battery pack. Will typically recharge battery to ~50% when completely discharged.
626944 Large external battery pack. Will typically recharge battery and charge second battery to ~20%.
626940 AC charger (USA). Includes power supply and USB cable. (included with ProDSS meter)
626941 AC charge (international). Includes power supply, USB cable and outllet adapters. (included with ProDSS meter)
626846 Replacement Lithium-ion battery pack
626969 ProDSS USB flash drive (included with ProDSS meter)
626991 Cable for charging and PC connection (included as part of 626940 and 626941 and included with ProDSS meter)
626992 Cable for connection to USB drive (included with ProDSS meter)
626990 Cable maintenance kit; 3 port plugs, 1 Krytox tube, 1 brush, 1 syringe, 1 sensor install/removal tool, 6 o-rings (included with all cables)
626919 Probe guard kit
599786 Calibration/storage cup
603062 Cable management kit (included with any cable 10, 20, or 30-meters long
626918 1 lb weight (included with any cable 10-meters and longer)
605978 4.9 oz weight

Replacement modules

626890 Replacement optical DO sensor cap
626963 Replacement pH electrode module
626964 Replacement pH/ORP electrode module
626965 Replacement nitrate electrode module
626966 Replacement ammonium electrode module
626967 Replacement chloride electrode module


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