600R Multi-Parameter Water Quality Sonde

6-Series Legacy Sondes

View YSI 6-Series water quality sondes being used in a variety of water environments for long-term underwater monitoring and spot sampling.

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Water Quality Sampling Sonde

The 600R provides water quality sampling in a small package for surface water and ground water applications.
With a diameter of less than two inches (4.2 cm), the 600R easily fits into wells.

Instrument only. Cables, probes/sensors, and accessories sold separately.

  • Overview

    This sonde measures dissolved oxygen using the Rapid Pulse® stirring-independent dissolved oxygen sensor.

    Parameters include:

    • Dissolved Oxygen (polarographic)
    • Temperature
    • Conductivity
    • Salinity
    • Specific Conductance
    • pH
    • Total Dissolved Solids (TDS)

    The pH reference electrode is field-replaceable.

    The 600R comes standard with RS-232 and SDI-12 communications and easily interfaces with data collection platforms for long-term deployment, or a YSI 650 Multiparameter Display System for sampling. When powered externally the 600R will log all parameters at programmable intervals and store up to 150,000 data sets.


    • RS-232 and SDI-12 communications
    • Easily connects to data collection platforms
    • Compatible with the YSI 650 MDS
    • Fits down 2-inch wells
    • Compatible with EcoWatch software

    Maintenance Special

    Inspect, protect, and revitalize your equipment with the annual YSI Sonde Maintenance Special. Longer life expectancy, less downtime, and ensure the highest quality data. Click here to learn more.

  • Specifications
    General Sonde Specifications  
    Medium Fresh, sea or polluted water
    Temperature - Operating -5 to +50°C
    Temperature - Storage -10 to +60°C
    Communications RS-232, SDI-12
    Software EcoWatch®
    Diameter 1.65 in, 4.2 cm
    Length 14 in, 35.6 cm
    Weight 1.1 lbs, 0.5 kg
    Power - External 12 V DC
    Sensor Specifications Range Resolution Accuracy
    Dissolved Oxygen
    % Saturation
    0 to 500% 0.1% 0 to 200%: ±2% of reading or 2% air saturation, whichever is greater;
    200 to 500%: ±6% of reading
    Dissolved Oxygen
    0 to 50 mg/L 0.01 mg/L 0 to 20 mg/L: ± 0.2 mg/L or 2% of reading, whichever is greater;
    20 to 50 mg/L: ±6% of reading
    Conductivity• 0 to 100 mS/cm 0.001 to 0.1 mS/cm
    (range dependent)
    ±0.5% of reading + 0.001 mS/cm
    Salinity 0 to 70 ppt 0.01 ppt ±1% of reading or 0.1 ppt,
    whichever is greater
    Temperature -5 to +50°C 0.01°C ±0.15°C
    pH 0 to 14 units 0.01 unit ±0.2 unit
    ORP -999 to +999 mV 0.1 mV ±20 mV
    Depth - Medium 0 to 200 ft, 61 m 0.001 ft, 0.001 m ±0.4 ft, ±0.12 m

    • Report outputs of specific conductance (conductivity corrected to 25° C), resistivity, and total dissolved solids are also provided. These values are automatically calculated from conductivity according to algorithms found in Standard Methods for the Examination of Water and Wastewater (ed 1989).

    Specifications indicate typical performance and are subject to change.

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