Environmental Monitoring Systems (EMS)
Multi-parameter Water Quality Sondes
  • Sampling, Logging& Profiling

Integrated Systems & Services (ISS)
Environmental Monitoring Modules
  • Buoy& Floating Platforms, Profiling Systems, EcoMapper AUV

Multiparameter Sondes

6920 V2 Sonde


Compact Data Sonde for Unattended Monitoring


The YSI 6920 V2 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.


The sonde comes in two versions:

  • 6920 V2-1 has 1 optical port, 1 conductivity/temperature port, 1 Rapid Pulse Dissolved Oxygen port, 1 pH/ORP port, and 3 ISE ports
  • 6920 V2-2 has 2 optical ports, 1 conductivity/temperature port, 1 pH port, and 1 ISE port

Available optical sensors:

  • ROX optical dissolved oxygen
  • Blue-green algae
  • Chlorophyll
  • Turbidity
  • Rhodamine

A pressure sensor is an option on both versions.

Additional parameters include:

  • Salinity
  • Specific Conductance
  • Depth or Shallow Vented Level
  • TDS
  • Open-channel Flow
  • Nitrate-nitrogen, Ammonia/Ammonium-nitrogen, or Chloride (ISEs)

Extend deployment intervals by 3 times or more with NEW Anti-Fouling Kits.

This product features:

  • Field-replaceable sensors
  • Choice between one or two optical sensor ports
  • Self-cleaning optical sensors and anti-fouling components for extended deployment
  • RS-232 and SDI-12 communications
  • Battery power for long-term deployments

Two versions are available:

The 6920 V2-2 with and the 6920 V2-1 with
  • 2 optical ports
  • Conductivity/temperature port
  • pH or pH/ORP port
  • ISE port
  • 1 optical port
  • Conductivity/temperature port
  • Rapid Pulse DO port
  • pH or pH/ORP port
  • 3 ISE ports


Medium Fresh, sea or polluted water
Temperature Operating
-5 to +50°C
-10 to +60°C
Communications RS-232, SDI-12
Software EcoWatch®
Dimensions Diameter
2.85 in, 7.24 cm
18 in, 45.7 cm
4 lbs, 1.8 kg
Power External
12 V DC
8 AA-size alkaline batteries

CE, EU Battery Compliance, FCC, IP-67, WEEE, and MCERTS
Assembled in the USA

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