YSI Pro DSS Multiparameter Water Quality 4 Port Digital Sampling System


SKU: ysiprodss

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Handheld multiparameter instrument with multiple cable options

The YSI ProDSS (digital sampling system) handheld multiparameter meter provides extreme flexibility with two main cable options. Choose between the fully loaded 4-port cable assembly outfitted with any four DSS sensors (with depth or no depth) or the ODO/CT probe and cable - where you get accurate DO measurements every time with an optical dissolved oxygen sensor with an inline conductivity sensor, allowing for real-time salinity compensation.

What are they all talking about? The 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), 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 water quality meter 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)
Total Algae-Phycocyanin
Total Algae-Phycoerythrin
Specific Conductance
Total Dissolved Solids (TDS)
Seawater Density
Total Suspended Solids (TSS)
GPS Coordinates
Barometric Pressure

There are multiple features of the ProDSS water quality meter:

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
Kor 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

ot 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.


Unit just sent into YSI for service with new desiccant.  Excellent condition.  Sold with warranty. 


  • YSI Pro DSS Multiparameter meter
  • Sensor Cable
  • Pro DSS 4 port sampler with ProDSS ODO Optical Dissolved Oxygen Sensor
    ProDSS pH/ORP Sensor, ProDSS Conductivity and Temperature Sensor installed
  • Brand new battery installed
  • Brand new YSI USB cable for connecting the PC for data transfer and charging.



30 Day warranty. We pledge to offer the best service and warranty to all of our customers!  We are extending a 30 Day warranty on this item. This is our way of saying thank you for allowing us to serve you.


This is a genuine product from this manufacturer.


The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. the item is subject to FDA regulation, we will verify your status as an authorized purchaser of this item before shipping of the item."

Regardless of the origin of the equipment, documentation provided or identification appearing upon the equipment, the equipment described and offered here is in no way certified for, recommended for, or offered for any specific use. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental or consequential, associated in any way with the equipment. The purchaser, by bidding on this equipment, indicates their acknowledgment of, and agreement to the terms of this disclaimer. it is the purchaser's responsibility to have the item inspected and certified by a qualified professional before use!