YSI EXO2 Multiparameter Sonde
Category: Multiparameter Sondes (EMS)
Highest Data Quality
Onboard monitoring systems verify sensor operation
7 universal ports for allow for any combination of smart sensors or the central wiper
Best-in-class wiper technology
The toughest grade parts guarantee operation well into the future
EXO can plug-and-play into marine, estuarine, freshwater, and groundwater monitoring systems
Smart Sondes and Sensors
EXO is an extremely versatile instrument, allowing the user to automatically configure a sonde with different sensors for different applications in minutes
Smart Sensor Options:
• Conductivity/Temperature (wiped and non-wiped)
• Dissolved Oxygen
• ISEs (Ammonium, Chloride, and Nitrate)
• pH (guarded and unguarded)
• pH & ORP (guarded and unguarded)
• Total Algae (Chlorophyll + Phycocyanin and Phycoerythrin)
Other Available Parameters
• Absolute Pressure
• DO% Local
• Guage Pressure
• nLF Conductivity
• Specific Conductivity
• Total Dissolved Solids
• Total Suspended Solids
• Water Density
EXO sondes and sensors are 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 smart sensor 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 anti-fouling systems protect data integrity
• Low power consumption extends underwater deployments
Monitoring Made Mobile
EXO makes it easy to view data in the field. The EXO Handheld offers a dedicated, streamlined interface to EXO sondes. EXO GO uses Bluetooth to connect any Windows OS device to a submerged EXO sonde.
Other EXO Sonde Options
• EXO1 sonde has 4 ports and a smaller diameter
• EXO3 sonde has 5 ports for a lower cost option using the central wiper
• EXO2s sonde offers the same features as the EXO2, but without the battery compartment
Add an EXO Factory Service Plan to your next sonde purchase and have the peace of mind that your new instrument is covered. Use today’s budget to protect your investment for years to come!
The EXO sondes are a key component of a complete, unattended long-term water quality monitoring system from our Integrated Systems & Services group.
Learning a new water quality platform can be a challenging process. Accelerate through the learning curve with our on-demand training program. Join us at YSI University!
KorEXO Software is an accessible, feature-rich platform for managing EXO instrumentation and water quality data. Easily calibrate sensors, setup long-term deployments, and ensure equipment is operating at peak performance!
|Anti Fouling||Central Wiper|
|Depth / Pressure Rating / Limit||0 to 250 m (0 to 820 ft)|
|Desktop Software Compatible||Yes|
|Languages||German, English, French, Japanese, Chinese, Spanish|
|Medium||Fresh, sea or polluted water|
|Memory||>1,000,000 logged readings, 512 MB total memory|
|Operating Temperature||-5 to +50°C|
|Power||4 Alkaline Batteries|
|Smart Sensors / Ports||Yes|
|Storage Temperature||-20 to +80°C|
|Unit of Measure||Parameter Dependent|
|Battery Life||90 days*|
|Communications||Computer Interface: Bluetooth wireless technology (between sonde and handheld or computer with KOR software), USB
Output Options: USB with signal output adapter (SOA); RS-232 & SDI-12 with DCP-SOA.
|Diameter||7.62 cm (3.00 in)|
|Length||71.10 cm (28.00 in)|
|Peripheral Ports||1 power communication port; 1 auxiliary port for third-party sensors (future functionality; not active yet)|
|Sample Rate||Up to 4 Hz|
|Sensor Ports||7 (6 ports available when central wiper used)|
|Warranty: 3 mos||Replaceable reagent modules for ammonium, chloride, and nitrate|
|Warranty: 1 yr||Optical DO membranes and replaceable reagent modules for pH and pH/ORP|
|Warranty: 2 yrs||Cables; sonde bulkheads; handheld; conductivity, temperature, depth, and optical sensors; electronics base for pH, pH/ORP, ammonium, chloride, and nitrate sensors; and accessories|
|Weight||3.60 kg (7.90 lbs)|
*Typically 90 days at 20C at 15-minute logging interval; temperature/conductivity, pH/ORP, DO, total algae, and turbidity sensors installed with central wiper that rotates once per logging interval on EXO2. Battery life is heavily dependent on sensor configuration.
|EXO Parameter Measured||Sensor**||Range||Accuracy||Response||Resolution|
Ammonia with pH sensor
|0 to 200 mg/L (0 to 30C)||±10% of reading or 2 mg/L-N, w.i.g.||T63<30 sec||0.01 mg/L|
|Barometric Pressure||Integral Barometer||375 to 825 mmHg||±1.5 mmHg from 0 to 50°C||-||0.1 mmHg|
|Total Algae Sensor
|0 to 100 μg/L;
0 to 100 RFU;
|Linearity: R2 >0.999 for serial dilution of Rhodamine WT solution from 0 to 100 μg/mL BGA-PC equivalents||T63<2 sec||0.01 μg/L;
|Total Algae Sensor
|0 to 280 μg/L;
0 to 100 RFU;
|Linearity: R2 >0.999 for serial dilution of Rhodamine WT solution from 0 to 280 μg/mL BGA-PE equivalents||T63<2 sec||0.01 μg/L;
|0 to 18000 mg/L-Cl (0 to 30C)||±15% of reading or 5 mg/L-Cl, w.i.g.||T63<30 sec||0.01 mg/L|
|Chlorophyll||Total Algae Sensor||0 to 400 μg/L Chl;
0 to 100 RFU
|Linearity: R2 >0.999 for serial dilution of Rhodamine WT solution from 0 to 400 μg/L Chl a equivalents||T63<2 sec||0.01 μg/L Chl;
|Conductivity1||Conductivity / Temperature Sensor
|0 to 200 mS/cm||0 to 100: ±0.5% of reading or 0.001 mS/cm, w.i.g.;
100 to 200: ±1% of reading
|T63<2 sec||0.0001 to 0.01 mS/cm (range dependent)|
|Depth - 10 m||Integral, Non-vented Depth Sensor3||0 to 10 m
(0 to 33 ft)
|±0.04% FS (±0.004 m or ±0.013 ft)||T63<2 sec||0.001 m (0.001 ft)
|Depth - 100 m||Integral, Non-vented Depth Sensor3||0 to 100 m
(0 to 328 ft)
|±0.04% FS (±0.04 m or ±0.13 ft)||T63<2 sec||0.001 m (0.001 ft)
|Depth - 250 m||Integral, Non-vented Depth Sensor3||0 to 250 m
(0 to 820 ft)
|±0.04% FS (±0.10 m or ±0.33 ft)||T63<2 sec||0.001 m (0.001 ft)
|Dissolved Oxygen, % air saturation||Optical Dissolved Oxygen Sensor
|0 to 500%
|0 to 200%: ±1% of reading or 1% saturation, w.i.g.;
200 to 500%: ±5% of reading 4
|T63<5 sec5||0.1% air saturation|
|Dissolved Oxygen, mg/L||Optical Dissolved Oxygen Sensor
|0 to 50 mg/L||0 to 20 mg/L: ±0.1 mg/L or 1% of reading, w.i.g.;
20 to 50 mg/L: ±5% of reading 4
|T63<5 sec5||0.01 mg/L|
|0 to 300 ppb Quinine Sulfate equivalents (QSU)||Linearity: R2 > 0.999 for serial dilution of 300 ppb QS solution
Detection Limit: 0.07 ppb QSU
|T63<2 sec||0.01 ppb QSU|
|Level, Vented - 10 m||Integral Vented Level Sensor||0 to 10 m (0 to 33 ft)||±0.03% FS (±0.003 m or ±0.010 ft)||T63<2 sec||0.001 m (0.001 ft)|
|0 to 200 mg/L-N (0 to 30C)||±10% of reading or 2 mg/L-N, w.i.g.||T63<30 sec||0.01 mg/L|
SKU:599701 guarded, 599702 unguarded
SKU:599705 guarded, 599706 unguarded
|0 to 14 units||±0.1 pH units within ±10C of calibration temp;
±0.2 pH units for entire temp range7
|T63<3 sec8||0.01 units|
|-999 to 999 mV||±20 mV in Redox standard solution||T63<5 sec6||0.1 mV|
|Temperature||Conductivity / Temperature Sensor
|-5 to 35°C
35 to 50°C
|T63<1 sec||0.001 °C|
|0 to 4000 FNU||0 to 999 FNU: 0.3 FNU or ±2% of reading, w.i.g.;
1000 to 4000 FNU: ±5% of reading10
|T63<2 sec||0 to 999 FNU = 0.01 FNU;
1000 to 4000 FNU = 0.1 FNU
|Salinity||Calculated from Conductivity and Temperature11||0 to 70 ppt||±1.0% of reading or 0.1 ppt, w.i.g.||T63<2 sec||0.01 ppt|
|Specific Conductance||Calculated from Conductivity and Temperature11||0 to 200 mS/cm||±0.5% of reading or .001 mS/cm, w.i.g.||-||0.001, 0.01, 0.1 mS/cm
|Total Dissolved Solids (TDS)||Calculated from Conductivity and Temperature11||0 to 100,000 mg/L
Cal constant range
0.30 to 1.00
|Total Suspended Solids (TSS)||Calculated from Turbidity and user reference samples||0 to 1500 mg/L||Not specified||T63<2 sec||Variable|
**Specifications indicate typical performance and are subject to change. All sensors have a depth rating to 250 m (820 ft), except shallow and medium depth sensors, ammonium, chloride, and nitrate. Accuracy specification is attained immediately following calibration under controlled and stable environmental conditions. Performance in the natural environment may vary from quoted specification.
w.i.g. = whichever is greater
EXO sensors are not compatible with YSI 6-Series sondes, sensors, or handheld.
1Outputs of specific conductance (conductivity corrected to 25C) and total dissolved solids are also provided. See Calculated Parameters and footnote 11.
2 Temperature accuracy traceable to NIST standards
3Accuracy specifications apply to conductivity levels of 0 to 100,000 μS/cm.
4 Relative to calibration gases
5 When transferred from air-saturated water to stirred deaerated water
6 When transferred from water-saturated air to Zobell solution
7Within the environmental pH range of pH 4 to pH 10.
8On transfer from water-saturated air to rapidly stirred air-saturated water at a specific conductance of 800 μS/cm at 20C; T63<5 seconds on transfer from water-saturated air to slowly-stirred air-saturated water.
9 Calibration: 1-, 2-, or 3-point, user-selectable
10 Performance based on 3-point calibration done with YSI AMCO-AEPA standards of 0, 124, and 1010 FNU. The same type of standard must be used for all calibration points.
11 Values are automatically calculated from conductivity according to algorithms found in Standard Methods for the Examination of Water and Wastewater (Ed. 1989).
Xenoy is a trademark of SABIC Innovative Plastics IP BV.
EXO Bluetooth modules comply with Part 15C of FCC Rules and have FCC, CE Mark and C-tick approval. Bluetooth-type approvals and regulations can be country specific. Check local laws and regulations to insure that the use of wireless products purchased from Xylem are in full compliance.
Inquiry - YSI EXO2 Multiparameter Sonde