Exo Sonde / Sensor
When only the best will do.
EXO is the premium water quality monitoring platform in the world.
EXO Sondes are perfect for long-term deployments. Daisychain multiple sondes for measurements at vaious depths.
Multiparameter Water Quality Sonde with 4 sensor ports, optional depth sensor, and battery compartment
EXO Multiparameter Sondes : the best-in-class platform for the highest quality data. EXO’s dynamic range of smart sensors provide comprehensive multiparameter water quality data while SmartQC ensures proper calibrations and top sensor performance. You can be confident in your extended deployments thanks to EXO’s tough materials and unmatched anti-fouling technology.
Highest Data Quality
Onboard monitoring systems verify sensor operation
Multiparameter Monitoring
4 universal ports for allow for any combination of smart sensors
Industry-leading Anti-fouling
Best-in-class wiper technology
Titanium Components
The toughest grade parts guarantee operation well into the future
Seamless Integration
EXO can plug-and-play into marine, estuarine, freshwater, and groundwater monitoring systems
Selection Guide
| EXO1 | EXO2 | EXO2s | EXO3 | |
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| Smart Ports | 4 | 7 | 7 | 5 |
| Battery Type | 2 D-cell | 4 D-cell | External Power | 2 D-cell |
| Battery Life | 90 days* | 90 days* | N/A | 60 days* |
| Dimensions | Length: 64.77 cm Diameter: 4.70 cm |
Length: 71.10 cm Diameter: 7.62 cm |
Length: 47.00 cm Diameter: 7.62 cm |
Length: 58.67 cm Diameter: 7.62 cm |
| Weight (fully loaded) | 1.42 kg | 3.60 kg | 1.10 kg | 2.00 kg |
| SDI-12 | with Adapter | with Adapter | with Adapter | Integral |
| Vented Level | / | / | ||
| Wiper | / | / | / | |
| Auxiliary Port | / | / | ||
| *Battery life will depend on the type of sensors and measurement frequency. Specifications indicate typical performance and are subject to change. Please check YSI.com/EXO for up-to-date information. |
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Monitoring Made Mobile
EXO GO
EXO GO uses Bluetooth to connect any Windows OS device to a submerged EXO Sonde. Pair with a tablet or laptop and leverage the full power of KorEXO Software for your monitoring applications.
Choose EXO GO for the flexibility of monitoring with any Windows OS device and access to the full features of KorEXO Software. EXO GO cuts out the middleman and delivers data directly to your PC!
EXO Handheld
The EXO Handheld offers a dedicated, streamlined interface to EXO Sondes. Convenient monitoring is achieved with a backlit color display, ergonomic design, and simple operation.
Choose the EXO Handheld for an easy-to-use, purposebuilt interface with a tactile keypad and full color display. Keep it simple and collect data in the most challenging environments with the EXO Handheld!
Enhanced interface for calibrating and data logging with the EXO platform.
The EXO Handheld offers convenient monitoring with a dedicated, streamlined interface to EXO Sondes. The ultra-rugged handheld features a backlit color display, ergonomic design, and simple operation.
Enhanced interface for calibrating and data logging with the EXO platform.
A dynamic range of sensors for multiparameter applications
| Sensor Specifications | |||
| Sensor | Range | Resolution1 | Accuracy2 |
| Conductivity
(Non-Wiped) |
0 to 200 mS/cm | 0.0001 to 0.01 mS/cm | ±0.5% of reading or 0.001 mS/cm, w.i.g. (0-100 mS/cm) ±1% of reading (100-200 mS/cm) |
| -5 to 50°C | 0.001°C | ±0.01°C (-5 to 35°C) ±0.05°C (35 to 50°C) |
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| Conductivity (Wiped)Temperature |
0 to 100 mS/cm | 0.0001 to 0.01 mS/cm | ±1% of reading or 2 μS/cm, w.i.g. |
| -5 to 50°C | 0.001°C | ±0.2°C | |
| Depth Vented Level |
0 to 10, 100 or 250 m | 0.001 m | ±0.2°C |
| 0 to 10 m | 0.001 m | ±0.04% Full Scale | |
| Dissolved Oxygen | 0 to 500% air sat. | 0.1% air sat. | ±1% of reading or 1% sat., w.i.g., (0 to 200%) ±5% of reading (200 to 500%) |
| 0 to 50 mg/L | 0.01 mg/L | ±1% of reading or 0.1 mg/L, w.i.g., (0 to 20 mg/L) ±5% of reading (20 to 50 mg/L) |
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| fDOM | 0 to 300 ppb QSE | 0.01 ppb QSE | Linearity: r2 ≥ 0.999 for 0 to 300 ppb QSE, MDL of 0.016 ppb QSE |
| pH
ORP |
0-14 pH units | 0.01 pH unit | ±0.1 within ±10°C of cal temp ±0.2 for all other temps |
| 999 to 999 mV | 0.1 mV | ±20 mV | |
| Rhodamine | 0 to 100 RFU or 0 to 1,000 µg/L |
0.01 RFU or 0.01 µg/L | ±5% or 0.1 µg/L w.i.g, Linearity: r2 > 0.999 |
| TAL-Chlorophyll
TAL-PhycocyaninT AL-Phycoerythrin |
0 to 100 RFU or 0 to 400 µg/L chl |
0.01 RFU or 0.01 µg/L of pigment L |
Linearity: r2 ≥ 0.999 for Rhodamine WT across full range |
| 0 to 100 RFU or 0 to 100 µg/L PC |
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| 0 to 100 RFU or 0 to 280 µg/L PE |
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| Turbidity | 0 to 4000 FNU | 0.01 FNU to 0.1 FNU | 0.3 FNU or ±3% of reading, (0 to 999 FNU) ±5% of reading (1000 to 4000 FNU) |
| 1Range dependent. 2Specifications indicate typical performance and are subject to change. Please check YSI.com/EXO for up-to-date information. |
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