YSI ProDSS Multi-Parameter Water Quality Meter

The YSI ProDSS is a water quality meter (cable/sensors sold separately) that provides extreme flexibility for measuring optical DO, turbidity, conductivity, pH, ORP, ammonium (ammonia), nitrate, chloride, temperature, and depth.


  • Digital smart sensors are automatically recognized by the instrument and store calibration data
  • Long-life lithium-ion battery; ensures reliability and minimizes waste
  • 3 year instrument warranty; 2 year cable warranty (sensor warranties vary)
List Price $2,053.50
YSI ProDSS Multi-Parameter Water Quality Meter

The YSI Pro Digital Sampling System (ProDSS) is a revolutionary handheld instrument for water quality spot sampling and profiling in the most demanding field conditions. The ProDSS is the most advanced handheld instrument available and can measure a wide range of parameters.

Digital Sampling System - Smart and Easy-to-Use
Any sensor (not included with meter purchase) can be installed in any of the 4 sensor ports, allowing for measurement of any combination of parameters. The ProDSS handheld features a menu-driven user interface and an onboard help key/function.

Advanced Features and Durable Design
The ProDSS features a graphic, backlit color display and a backlit keypad for visibility and easy menu navigation in all lighting conditions. The YSI ProDSS utilizes a rechargeable lithium-ion battery pack.

The ProDSS handheld cable (cable management kit included with 10, 20, and 30-meter cables) and sensors are sold separately to provide many options when “building” a ProDSS system. The handheld features optional built-in GPS capability, while the cables (up to 100 meters) have an optional depth sensor. GPS coordinates can be stored with measurement data for geo-mapping in the provided PC data management software, KorDSS.

Download Data to PC or Transfer to USB Stick
The ProDSS features a built-in micro USB On-The-Go port for connection to a PC or USB stick. KorDSS software, a powerful PC data management program for the ProDSS, is included with each instrument. The ProDSS internal memory allows for logging > 100,000 data sets, plus 100 sites, 100 Data IDs and 400 GLP records.

Additional Features:

  • Single cable design features universal ports which can accept any 4 sensors (not included with purchase) plus depth.
  • The menu-driven instrument allows for easy operation and quick calibration
  • >100,000 data-set memory; KorDSS PC data software included
  • GLP compliant; detailed GLP information is available to view, download or print.
  • Built-in USB On-The-Go port for recharging the lithium-ion battery and data transfer
  • Rugged, waterproof case (IP-67 rated) with rubber over-mold and metal, military-spec (MS) cable connectors as well as rugged titanium sensors
  • Warranty: 3-year instrument; 2-year cable and sensors; 1-year pH and pH/ORP sensor modules; 6-months ammonium, nitrate and chloride sensor modules.

*ProDSS purchases include the instrument, manual, batteries, USB cable, and USB flash drive. Cables and probes are ordered separately.

  • Barometer: Built-in barometer
  • Certifications: RoHS, CE, WEEE, FCC, IP-67, 1-meter drop test, UN Part III Section 38.3 test methods for lithium-ion batteries (class 9), Assembled in USA
  • Connectivity: Built-in micro USB port
  • Connector: MS (military spec) waterproof with quarter-turn bayonet lock (unsurpassed in regards to durability)
  • Data Management: KorDSS desktop PC software (included)
  • Data Memory: >100,000 data sets; 400 GLP files
  • Dimensions: 8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in x 8.5 in x 2.21 in)
  • Display: Color, LCD graphic display; backlit keypad
  • Cables: With or without depth sensors in lengths of 1, 4, 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100-meters;  10, 20 and 30-meter cables include a cable management kit; all cables 10-meters and longer include a 1 lb weight
  • Flow Cell: Yes; flow cell is available
  • GLP Compliance: Yes; detailed GLP information is stored and is available to view, download or print
  • Languages: English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified & Traditional)
  • Logging Modes: Single point or Continuous
  • Operating Temperature: 0 to 50°C (32 to 122°F)
  • Power: Rechargeable lithium-ion battery pack providing ~48 hours of battery life (instrument only with backlight off)
  • Storage Temperature: 0 to 45°C (32 to 113°F) with battery installed; 0 to 60°C (32 to 140°F) without battery installed
  • Sites and Data ID: 100 user-defined sites and 100 user-defined data ID tags
  • 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
  • Waterproof: IP-67 (even with the battery cover off); floats
  • Meter Weight with Batteries: 567 grams (1.25 lbs)
  • Bulkead Weight with 4 Sensors: 680 grams (1.5 lbs) with sensor guard on; 589 grams (1.3 lbs) without sensor guard
  • GPS: Optional internal GPS; coordinates are stored with measurement data and site lists
  • Sensor Ports: 4 universal sensor ports on each cable; can accept ProDSS sensor
  • (1) ProDSS multi-parameter display
  • (1) Rechargeable lithium-ion battery (pre-installed)
  • (1) Hand strap
  • (1) USB cable for charging & PC connection
  • (1) Universal AC charger
  • (1) Cable for connection to USB memory stick
  • (1) Quick start guide
  • (1) USB memory stick containing KorDSS software and manual
Questions & Answers
What is the battery life?
The ProDSS uses a rechargeable Lithium-Ion battery pack that lasts 48 hours with the instrument alone and about 20 hours with the instrument and fully loaded cable assembly.
How does the ProDSS compare to the Pro Plus in terms of parameters?
The ProDSS, like the Pro Plus, is a multi-parameter meter. The advantage of the ProDSS is that it can measure turbidity and optical dissolved oxygen, whereas the Pro Plus does not support turbidity and uses electrochemical dissolved oxygen. The ProDSS also has optional depth and GPS.
What is a “Smart” Sensor?
The “Smart” Sensor holds the calibration in the sensor, so it can be moved from meter to meter without needing to recalibrate.
Does the water quality meter come calibrated?
When ordered from Fondriest Environmental, all YSI sampling equipment is assembled and calibrated prior to shipment at no cost and includes a calibration report.
What software is available for the YSI ProDSS?
The ProDSS includes a USB memory stick containing Kor Software and PDF manual. Kor Software is an easy-to-use platform full of features for managing YSI instrumentation and water quality data. View live or recorded data, calibrate sensors, setup long-term deployments, and ensure equipment is operating at peak performance.
Do probes come with the handheld meter?
No, cable assemblies and sensors are sold separately.
Can the ProDSS meter accommodate the ProSwap 1-port cable assemblies?
Yes. Connect the ProSwap cable to a ProSwap or ProDSS handheld meter via the twist-lock MS connector.
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