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

EXO2 Water Quality Sonde


The EXO2 water quality sonde is a new YSI multiparameter instrument that collects data with six user-replaceable sensors, a central wiper to keep sensors clean of biofouling, and an integral pressure transducer for depth.


Smart Ports: Each sensor port on the sonde accepts any EXO water quality sensor and automatically recognizes it.


Sensor Options:

  • Conductivity and Temperature
  • Dissolved Oxygen (optical)
  • fDOM (Fluorescent Dissolved Organic Matter, surrogate for CDOM)
  • pH or pH / ORP
  • Depth (integral)
  • Total Algae (Dual-channel Chlorophyll and Blue-green Algae)
  • Turbidity


Data Collection Options:

  • Store onboard the sonde
  • Transfer data to DCP
  • Relay data to PC
  • Relay data to EXO Handheld
The EXO2 with  
  • 7 sensor ports (6 ports available for sensors when central wiper used)
  • Integral pressure transducer
  • 1 peripheral port for power communication
  • 1 peripheral port for auxiliary sensor
  • Depth: 820 ft, 250 m


Medium Fresh, sea or polluted water
Temperature Operating
-5 to +50°C
-20 to +80°C

Bluetooth wireless technology; USB cable

RS-485, RS-232, SDI-12

Software KOR®
Dimensions Diameter
Length, no depth
3.00 in, 7.62 cm
28.00 in, 71.10 cm
3.60 kg, 7.90 lbs (batteries and sensors installed)
Power External
9 to 16.5 V DC
4 D-size alkaline batteries


Memory 512 MB; >1,000,000 logged readings

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