600XLM 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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Small Package - Economical Sampling or Logging

Both the YSI 600XL (sampling) and the YSI 600 XLM (logging) are economical solutions in small packages for surface water and groundwater applications. Both easily fit into 2-inch wells and measure a range of fundamental parameters, including oxygen - with the YSI Rapid Pulse™ stirring-independent dissolved oxygen sensor - and level, using a highly-accurate vented sensor.

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

  • Overview

    6-Series sondes are great, but check out our latest best-in-class platform at  YSI.com/EXO

    The YSI 600XL and YSI 600XLM compact sondes measure eleven parameters simultaneously:

    • Dissolved Oxygen (Rapid Pulse® DO, % and mg/L)
    • Temperature
    • Conductivity
    • Salinity
    • Specific Conductance
    • Resistivity
    • Depth or Shallow Vented Level
    • pH
    • ORP
    • Total Dissolved Solids

    Connect with Data Collection Platforms

    Either sonde can easily connect toyour own data collection platform, via SDI-12 for remote and real-time data acquisition applications.

    Economical Logging System

    The YSI 600XLM is an economical logging system for long-term, in situ  monitoring and profiling. It will log all parameters at programmable intervals and store 150,000 readings. At one-hour intervals, the instrument will log data for about 75 days utilizing its own power source. The 600XL can also be utilized in the same manner with user-supplied external power.

    • Either sonde fits down 2-inch wells
    • Horizontal measurements in very shallow waters
    • Stirring-independent Rapid Pulse® dissolved oxygen sensor
    • Field-replaceable sensors
    • Easily connects to data collection platforms
    • Available with detachable cables to measure depth up to 200 feet
    • Compatible with YSI 650 Multiparameter Display System
    • Use with the YSI 5083 flow cell for groundwater applications

    You can rely on the accuracy and reliability of YSI's sensor technology - the performance of select sensors on the 600XL and 600XLM have been ETV Verified.

    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, 4.9 cm
    Length 21.3 in, 54.1 cm
    Weight 1.5 lbs, 0.69 kg
    Power - External 12 V DC
    Power - Internal 4 AA-size alkaline batteries
    Certifications CE, EU Battery Compliance, FCC, IP-67, WEEE, and MCERTS; Assembled in the USA
    Sensor Specifications Range Resolution Accuracy
    Dissolved Oxygen
    % Saturation
    6562 Rapid Pulse™ Sensor†
    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
    6562 Rapid Pulse™ Sensor†​
    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
    6560 Sensor†
    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
    6560 Sensor†​
    -5 to +50°C 0.01°C ±0.15°C
    6561 Sensor†​
    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
    Depth - Shallow 0 to 30 ft, 9.1 m 0.001 ft, 0.001 m ±0.06 ft, ±0.02 m
    Vented Level 0 to 30 ft, 9.1 m 0.001 ft, 0.001 m ±0.01 ft, 0.003 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).
    † Sensors with listed with ETV logo were submitted to the U.S. EPA ETV program on the YSI 6600EDS. Information on performance characteristics of YSI water quality sensors can be found at www.epa.gov/etv, or call YSI at 800.897.4151 800.897.4151 for the ETV verification report. Use of ETV name or logo does not imply approval or certification of this product nor does it make any explicit or implied warranties or guarantees as to product performance. 

    Specifications indicate typical performance and are subject to change.

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