Water Quality System (WQS)
Field & Laboratory Meters
  • pH, SCT, DO & BOD, Multi-parameter Testing
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

EMS_6 Series and EXO Water Quality Sondes

EXO2s Customized Multiparameter Sonde



We have heard from customers who need the payload and capabilities of YSI’s best-in-class EXO2 sonde, but in spaces and places that can’t accommodate the EXO2. EXO2s is a customized, batteryless sonde that comes with the same warranty and capabilities as the EXO2, and is ideal for specialized applications such as:

• Attachment to an AUV or aerial drone
• Integration with a buoy
• Horizontal profiling where light weight is optimal

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

Connectivity / Communications:     

Computer Interface: Bluetooth wireless technology, RS-485, USB. Output Options with Adapters: USB; RS-232 & SDI-12; Modbus

Depth / Pressure Rating / Limit:

0 to 250 m (0 to 820 ft)


512 MB total memory; >1,000,000 logged readings



Operating Temperature:

-5 to 50 °C (23 to 122 °F)




Diameter: 7.62 cm (3.00 in)

Length: 47.00 cm (18.5 in)

Smart Sensors / Ports:

7 sensor ports (6 ports available when central wiper in use). Peripheral ports: 1 power communication port; 1 auxiliary expansion 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


2 Years: Cables; sonde bulkheads; handheld; conductivity, temperature, depth, and optical sensors; electronics base for pH, pH/ORP, ammonium, chloride, and nitrate sensors; and accessories

1 Year: Optical DO membranes and replaceable reagent modules for pH and pH/ORP

3 Months: Replaceable reagent modules for ammonium, chloride, and nitrate


1.60 kg (3.53 lbs) with a full payload of 5 probes, 1 wiper, and probe guard installed

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