YSI EXO2s Multi-Parameter Water Quality Sonde
Features
- Ideal for spot sampling or attachment to data buoys, AUV's, drones, etc.
- Smaller, lighter sondes can be deployed in tight spaces
- A more budget-friendly EXO without alkaline batteries
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The YSI EXO2s represents an advanced sonde platform that offers a wide range of capabilities to those dedicated to monitoring natural aquatic environments such as oceans, estuaries, rivers, lakes, and groundwater. The YSI EXO2s is a compact, batteryless sonde that comes with the same capabilities as the EXO2, and is ideal for specialized applications where external power is supplied. With a highly efficient power management platform, robust construction, and a chemistry-free anti-fouling system, the YSI EXO2s allows accurate data collection for up to 90 days between service intervals.
Multi-Port Water Quality Sonde
The EXO2s sonde includes six sensor ports and a central anti-fouling wiper option. Sensor parameters include:
- Temperature
- Conductivity
- Depth
- Dissolved oxygen
- pH
- ORP
- Total algae (phycocyanin or phycoerythrin along with chlorophyll)
- Turbidity
- Fluorescent dissolved organic matter (fDOM)
- Rhodamine WT
- UV nitrate
- ISE ammonium
- ISE nitrate
- ISE chloride
Outputs Four Calculated Parameters.
- Salinity
- Specific conductance
- Total dissolved solids (TDS)
- Total suspended solids (TSS)
Onboard Signal Processing and Memory
All EXO sensors are digital sensors with onboard signal processing and memory. Built-in sensor diagnostic and calibration data allow users to calibrate multiple sensors in one sonde and distribute them to various other sondes in the field. Wet-mateable connectors allow for swaps in wet conditions, while active port monitoring automatically detects each sensor and verifies operation.
EXO2s Specifications
Diameter: 7.62cm (3.00 in)
Length (with guard): 42.87cm (16.88 in)
Peripheral Ports: 1 power communication port; 1 auxiliary port for third-party sensors (future functionality; not active yet)
Sensor Ports: 7 (6 ports available when central wiper used)
3-Year Warranty: Sonde; handheld
2-Year Warranty: Cables; conductivity/temperature and optical sensors; electronics base for pH, pH/ORP, ammonium, chloride, and nitrate sensors
1-Year Warranty: Optical DO cap and replaceable reagent modules for pH and pH/ORP sensors
3-Month Warranty: Replaceable reagent modules for ammonium, chloride, and nitrate sensors
Weight: 1.06kg (2.34 lbs)
General Sonde Specifications
Power Requirement: 9-16 VDC
Computer Interface: YSIP via USB Signal Output Adapter (SOA) and Bluetooth
Output Options: RS-232 & SDI-12 via DCP-SOA; Modbus & RS-485 via Modbus-SOA
Data Memory: 512 MB total memory; >1,000,000 Logged readings
Depth Rating: 0 to 250m (0 to 820 ft)
Sample Rate: Up to 4 Hz
Operating Temperature: -5 to +50°C (23 to 122°F)
Storage Temperature: -20 to +80°C (-4 to 176°F)
- (1) EXO2s sonde
- (1) Probe guard
- (1) Calibration cup
- (1) Tool kit
- (4) Port plugs
- (1) USB drive loaded with manual & Kor Software
In The News
Testing CO2 Removal Strategies in the Pacific Northwest
The ocean plays a key role in carbon dioxide (CO2) removal and storage, also known as carbon sequestration. However, with increasing emissions, a large amount of CO2 escapes into the atmosphere, worsening climate change and leading to increases in surface temperatures. In order to mitigate some of these impacts, researchers like Ally Savoie at the Pacific Northwest National Laboratory (PNNL) are working hard to identify ways to safely improve the CO2 removal and storage capabilities in the ocean. Savoie started her career at Wright State University , where she worked in Silvia Newell’s lab examining biogeochemical cycling of nutrients in a river system. From there, she decided to pursue a master’s in marine science at the University of Southern Mississippi with Dr.
Smart Buoys Advance Climate Monitoring in Swiss Lakes
Lakes are sentinels of climate change . Globally, they are warming at an unprecedented but uneven rate, and in many places they also face direct human pressure, including from agriculture and recreation. In the Alps, scientists generally agree that climate change is of particular threat to remote lakes , where more pronounced warming threatens fragile ecosystems. Alpine Lakes in a Changing Climate Matteo Tonellotto is part of the team at the Environmental Observatory of the Italian-speaking region of Switzerland (OASI)–a multidisciplinary team of scientists, IT specialists, and chemical laboratory technicians committed to collecting, managing, and integrating high-quality environmental data.
Connecting with Nature in Real-Time at the Abernathy Field Station
Just five miles away from Washington and Jefferson (W&J) College is the 57-acre Abernathy Field Station . Generously donated by the Abernathy family in 2017, the field station has served as an outdoor lab to hundreds of undergraduate students over the years. Many classes use the Abernathy Field Station every week. For example, in BIO 111, students spend 15 weeks conducting their own research at the field station using a combination of sampling, field observations, and real-time environmental data, giving them a look into the world of science and a closer relationship with nature. “We like to start the students in the research process in their first Biology class.
Riding the Renewable Wave: Testing Wave Energy Converters at Oregon’s PacWave Site
Seven miles off Oregon’s weather-beaten coastline, the world’s biggest wave power testing facility, PacWave, is primed to put the latest renewable energy technology to the test. “There is a huge amount of energy that is not harvested in the ocean,” states the team at Oregon State University involved in the PacWave project. When it comes to harnessing the power of the waves, “It's exciting because it [wave power] is a non-polluting, non-carbon burning technology,” the team says. Wave Power The U.S. Energy Information Administration explains that tidal energy harnesses the flow of seawater in depth under the gravitational forces exerted by the sun and moon–the drivers of tides–while wave energy derives from the kinetic energy of wind-blown surface waves.






























