YSI ProDSS Multiparameter Water Quality Meter

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.

EXO Multiparameter Sonde


The EXO advanced water quality monitoring platform includes the versatile multiparameter EXO1 sonde for estuarine, surface water, or ground water applications.

Key Benefits

High-accuracy sensors with on-board memory

Wireless communications
Fast response times for profiling and sampling
Seamless integration into marine, estuarine, freshwater and ground water monitoring systems
Smart Sondes and Sensors
Extremely versatile instrument, allowing the user to automatically configure a sonde with different sensor for different applications in minutes


Tested in a variety of rigorous field conditions as well as lab conditions to ensure accuracy and response times

Monitor without Interruption

No matter which EXO sensors users select, other features of the sensors' design make them rugged and durable:

Wet-mateable connectors resist corrosion
Isolated components prevent short circuits
Welded housings and double o-rings prevent leaks
High-impact plastic and titanium resists breaking
Built-in antifouling systems protect data integrity
Low power consumption extends underwater deployments