6920 V2-2 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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SKU6920V2-01


Compact Data Sonde for Unattended Monitoring

The YSI 6920 V2-2 sonde is an economical water quality logging system, ideal for long-term in situ monitoring and profiling. Real-time turbidity monitoring, dissolved oxygen monitoring, algae monitoring, and more.

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

  • Overview

    The V2 sondes represent a proven generation of multi-parameter sondes from YSI. Perfect for harsh fouling environments, YSI's optical sensors feature an integrated wiper that prevents the impacts of biofouling, a corrosion-resistant titanium wiper shaft, and replaceable seals.

    The YSI 6920 V2-2 sonde features an internal battery pack with memory for long-term, unattended deployments. Additionally, the sonde can be powered by a 650 display unit for spot sampling applications.

    Features:

    • Internal battery pack & memory for long-term, unattended deployments
    • All sensors are field-replaceable, and optical sensors feature self-cleaning wipers
    • Compatible with real-time data logging systems

    The YSI 6820 V2-2 has the following available ports:

    • (1) Temperature/Conductivity
    • (1) pH or pH/ORP
    • (1) ISE (Nitrate, Ammonium, and Chloride)
    • (2) Optical (Dissolved Oxygen, Turbidity, Chlorophyll, Blue-Green Algae, and/or Rhodamine)

    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

    The 6920 V2-2 has:

    • 2 optical ports
    • Conductivity/temperature port
    • pH or pH/ORP port
    • ISE port
    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 2.85 in, 7.24 cm
    Length 18 in, 45.7 cm
    Weight 4 lbs, 1.8 kg
    Power - External 12 V DC
    Power - Internal 8 AA-size alkaline batteries
    Certifications CE, EU Battery Compliance, FCC, IP-67, WEEE, and MCERTS; Assembled in the USA
    Sensor Specifications Range Resolution Accuracy
    ROX™
    Optical Dissolved Oxygen•
    % Saturation
    0 to 500% 0.1% 0 to 200%: ±1% of reading or 1% air saturation, whichever is greater;
    200 to 500%: ±15% of reading
    ROX™
    Optical Dissolved Oxygen•
    mg/L
    0 to 50 mg/L 0.01 mg/L 0 to 20 mg/L: ± 0.1 mg/L or 1% of reading, whichever is greater;
    20 to 50 mg/L: ±15% of reading
    Conductivity••
    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
    Temperature
    6560 Sensor‡​
    -5 to +50°C 0.01°C ±0.15°C
    pH
    6561 Sensor‡​
    0 to 14 units 0.01 unit ±0.2 unit
    ORP -999 to +999 mV 0.1 mV ±20 mV
    Depth - Deep 0 to 656 ft, 200 m 0.001 ft, 0.001 m ±1 ft, ±0.3 m
    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
    Turbidity•
    6136 Sensor‡
    0 to 1,000 NTU 0.1 NTU ±2% of reading or 0.3 NTU,
    whichever is greater**
    Nitrate / nitrogen••• 0 to 200 mg/L-N 0.001 to 1 mg/L-N
    (range dependent)
    ±10% of reading or 2 mg/L,
    whichever is greater
    Ammonium / ammonia /
    nitrogen•••
    0 to 200 mg/L-N 0.001 to 1 mg/L-N
    (range dependent)
    ±10% of reading or 2 mg/L,
    whichever is greater
    Chloride••• 0 to 1000 mg/L 0.001 to 1 mg/L
    (range dependent)
    ±15% of reading or 5 mg/L,
    whichever is greater
    Rhodamine• 0-200 μg/L 0.1 μg/L ±5% reading or 1 μg/L,
    whichever is greater
    Blue-Green Algae Sensor Specifications Range Detection Limit Resolution Linearity
    Blue-Green Algae
    Phycocyanin•
    ~0 to 280,000 cells/mL†
    0 to 100 RFU
    ~220 cells/mL§ 1 cell/mL
    0.1 RFU
    R2 > 0.9999**
    Blue-Green Algae
    Phycoerythrin•
    ~0 to 200,000 cells/mL†
    0 to 100 RFU
    ~450 cells/mL§§ 1 cell/mL
    0.1 RFU
    R2 > 0.9999***
    Chlorophyll•
    6025 Sensor‡​
    ~0 to 400 μg/L
    0 to 100 RFU
    ~0.1 μg/L§§§ 0.1 μg/L Chl
    0.1% RFU
    R2 > 0.9999****

    • Maximum depth rating for optical probes is 200 feet, 61 m. Turbidity, Rhodamine, Blue-Green Algae (PC & PE) and Chlorophyll are available in a Deep Depth option (0 to 200 m). Anti-fouling optical probes have depth rating of 200 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).
    ••• Freshwater only. Maximum depth rating of 50 feet, 15.2 m. 600 V2-2 has 3 ISE ports; not available on the 6600V2-4.

    *In YSI AMCO-AEPA Polymer Standards.
    **For serial dilution of Rhodamine WT (0-400 ug/L).
    ***For serial dilution of Rhodamine WT (0-8 μg/L).
    ****For serial dilution of Rhodamine WT (0-500 ug/L).

    RFU = Relative Fluorescence Units ​
    † Explanation of Ranges can be found in the ‘Principles of Operation’ section of the 6-Series Manual, Rev D.
    ‡​ 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. 

    § Estimated from cultures of Microcystis aeruginosa.
    §§ Estimated from cultures Synechococcus sp.
    §§§ Determined from cultures of Isochrysis sp. and chlorophyll a concentration determined via extractions. 

    Specifications indicate typical performance and are subject to change.

  • Accessories

    6625 Optical Wiper Kit

    For use with YSI 6150, 6136, 6131, & 6132 optical probes. 2 pack.

    6570 Maintenance Kit

    For use with all 6-Series sondes, except the 600R

    6562 Rapid Pulse Dissolved Oxygen Sensor

    Rapid Pulse™ DO Sensor

    6132 Blue-Green Algae Sensor

    For marine (phycoerythrin) environments

    6131 Blue-Green Algae Sensor

    For freshwater (phycocyanin) environments

    6025 Chlorophyll Sensor

    Predict algae blooms and nutrient loading

    Membrane Kit, Standard, includes electrolyte (1 mil)

    Membrane Kit, Standard, includes electrolyte (1 mil)

    Zobell Solution, ORP Calibrator

    Zobell Solution, ORP Calibrator

    pH Buffer

    pH Buffer

    5580 Confidence Solution (case of 6 pints)

    5580 Confidence Solution (case of 6 pints)

    6130 Rhodamine WT Sensor

    Rhodamine tracing in fresh, brackish, sea, storm, and waste water

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