For immediate assistance call: 800-474-2490 Login Consult with an Expert

YSI Pro DSS MultiParameter Meter

Rental: Water Quality Meters- Multi-Parameter


NEW!  Featuring the latest technology digital sensors, extreme reliability, and user friendly form factor. The YSI Pro DSS is the best handheld multi-parameter meter we’ve tried. 

EON’s standard configuration includes:

Conductivity, Resistivity, Specific Conductance, SalinityTotal Dissolved Solids (TDS), pH/ORP, Temperature, Dissolved Oxygen (DO), Turbidity. and Flow Cell.


  • Digital Sensors for fast, accurate, and low maintenance results
  • Optical Dissolved Oxygen (DO) sensor eliminates the need for membranes and electrolytes
  • Turbidity measurement is included, no separate meter needed
  • Allows easy calibrations and logging
  • Rechargeable lithium-ion battery
  • Color display and backlit keypad; menu-driven operation

YSI Professional Plus

The YSI Professional Plus handheld multi-parameter meter steps up from the tried and true 556 MPS with a slimmer form factor, robust software and updated probe. It uses the same sensors as the traditional 556. 

EON's standard configuration includes: 

Dissolved Oxygen, Conductivity, Specific Conductance, Salinity, Resistivity, Total Dissolved Solids (TDS),  pH/ORP, and Temperature and a Flow-Cell.


  • Detailed on-screen Help function*
  • Interval or single-event logging
  • 6-point cal with auto-buffer recognition*
  • USB port
  • Recalibration prompts
  • Backlit display AND keypad*

YSI556 Multi-Parameter Meter

The YSI 556 MPS (Multiprobe System) is a rugged, reliable, easy-to-use, easy-to-read, handheld unit with all the functionality of a multi-parameter system. It simultaneously measures 5 parameters and calculate additional values. And, the YSI 556 MPS conforms to GLP standards. It is so reliable it is a standard in our rental fleet!

EON's standard configuration includes:

pH, ORP, Dissolved Oxygen, Conductivity (EC), Barometer, Temperature and a Flow-Cell. (Just ask if you want a longer cable for down-hole use.)


  • Stores over 49,000 time and date stamped data sets for viewing or downloading via RS-232. 
  • The DO electrode & pH/ORP probes are field replaceable.
  • The DO membranes are easily replaced using screw-on caps.

Horiba U52/U53

The U-52 & U53 multi-parameter water quality meters are equipped to measure and log data for as many as 11 parameters simultaneously with one single probe. Monitor surface water and ground water by deploying the probe directly into a body of water or using a flow cell. 

EON's standard configuration includes:

pH, Dissolved Oxygen, Conductivity (EC), Salinity, TDS, Turbidity, Temperature and a Flow-Cell


  • EPA method 180.1 turbidity and wiper system using the Model U-53 
  • Automatic one point calibration feature speeds calibration of pH, DO, conductivity, turbidity and water depth.
  • All parameters are displayed on one screen.
  • Store as many as 10000 sets of data.

 Item # Description/Size Availability Qty Breaks Price Quantity
Rental: YSI Pro DSS, pH, Cond, DO, Temp, Turb, TDS, Sal Flow-Cell 4 M Cable Daily: $95, Weekly: $285, Monthly: $855
1-Day Rate 1 $95.00
Rental: YSI Professional Plus & Flow Cell, pH/ORP/Con/Temp, 4m Daily: $78, Weekly: $234, Monthly: $702
1-Day Rate 1 $78.00
Rental: YSI 556 & Flow Cell, pH/Cond/ORP/DO/Temp, 4m Daily: $75, Weekly: $225, Monthly: $675
1-Day Rate 1 $75.00
Rental: YSI 556 & Flow Cell, pH/Cond/ORP/DO/Temp, 10m Daily: $75, Weekly: $225, Monthly: $675
1-Day Rate 1 $75.00
Rental: YSI 556 & Flow Cell, pH/Cond/ORP/DO/Temp, 20m Daily: $75, Weekly: $225, Monthly: $675
1-Day Rate 1 $75.00
Rental: Horiba U53 pH, Cond, DO, Temp, Turb, TDS, Sal Flow-Cell, 2m Daily: $95, Weekly: $285, Monthly: $855
1-Day Rate 1 $95.00
Rental: Horiba U52 pH, Cond, DO, Temp, Turb, TDS, Sal. Flow Cell, 4m Daily: $100, Weekly: $300, Monthly: $900
In Stock 1 $100.00

Click on the link(s) below for product specifications and/or manuals.

YSI ProDSS Manual

YSI 556 Manual

U-5x Flow cell Manual
U-5x Specifications