EXO3 Multiparameter Sonde

The parameters you need, without the features you don’t!

5-Port Multiparameter Water Quality Sonde


Add to Request

Offering the greatest value of any sonde available on the market, EXO3 combines the maneuverability of the EXO1 with the powerful antifouling wiper of the EXO2.

EXO3 is a purpose-built sonde for monitoring major water quality parameters, including: pH, conductivity, temperature, turbidity, and dissolved oxygen.

Key Benefits
• High-accuracy sensors with on-board memory
• Wireless communications
• Seamless integration into marine, estuarine, freshwater and ground water monitoring systems

Smart Sondes and Sensors
Extremely versatile instrument, allowing the user to automatically configure a sonde with different sensor for different applications in minutes

Tested in a variety of rigorous field conditions as well as lab conditions to ensure accuracy and response times

Monitor without Interruption
No matter which EXO sensors users select, other features of the sensors’ design make them rugged and durable:

• Wet-mateable connectors resist corrosion
• Isolated components prevent short circuits
• Welded housings and double o-rings prevent leaks
• High-impact plastic and titanium resists breaking
• Built-in antifouling systems protect data integrity
• Low power consumption extends underwater deployments

But that’s just the beginning of the great benefits EXO3 has to offer:

Maintenance Special
The best priced, highest-quality sonde for
baseline water quality monitoring.


 YSI Integrated Systems
Flexibility to switch from continuous monitoring to
spot sampling with a lighter, shorter form factor.


YSI Integrated Systems
Integral SDI-12 communications makes it ideal for existing data collection 
platforms and installations. (Including replacement of 6-Series sondes.)


EXO University
Plug-and-play design with all existing EXO platform smart sensors,
including Total Algae, fDOM, and Wiped Conductivity & Temperature.

EXO University
The best antifouling wiper in the industry, protecting your 
sensors for up to 90 days in the harshest conditions.

Connectivity / Communications Sonde: Bluetooth wireless technology, USB, RS-485, and integral SDI-12 Output Options with Adapters: USB, RS-232, or Modbus
Depth Rating 0 to 250 m (0 to 820 ft)
Desktop Software Compatible KorEXO
Flow Cell Yes

Fresh, sea or polluted water

Memory 512 MB total memory; >1,000,000 logged readings
Monitoring Yes
Multiparameter Yes
Operating Temperature -5 to 50 °C (23 to 122 °F)
Power 2 Alkaline Batteries
Sampling Yes

Diameter: 7.62 cm (3.00 in)  Length: 58.67 cm (23.1 inc)

Smart Sensors / Ports 5 sensor ports (4 ports available when central wiper in use) Peripheral ports: 1 power communication port
Storage Temperature -20 to 80 °C (-4 to 176 °F). Exception: 0 to 60 °C (32 to 140 °F) for pH and pH/ORP sensors
User Calibratable Yes
Waterproof Yes
Weight 2.00 kg (4.41 lbs) with a full payload of 4 probes, 1 wiper, and probe guard installed

Ordering Info

  • EXO3 With No Depth Sensor – 599503-00
  • EXO3 With 10M Depth Sensor – 599503-01
  • EXO3 With 100MDepth Sensor – 599503-02
  • EXO3 With 250M Depth Sensor – 599503-03




Scroll to Top