EXO2s Multiparameter Sonde

YSI EXO-S Series Overview

The EXO-S sondes are shorter, lighter, more affordable, and more sustainable versions of our industry-leading EXO sondes. These sondes are purpose-built without a battery compartment and provide the same sensor payload and best-in-class performance for applications where external power is available.

EXO Sonde Overview | Multiparameter Water Quality

Explore common features and individual options of the different EXO Multiparameter Water Quality Sondes

EXO2s Sonde Unboxing & Overview

Hi, this is Zack Henderson, product manager for YSI, a Xylem brand. And today, I'm super excited to do an unboxing video for our brand new EXO2s Sonde.

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SKU577502-00

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Multiparameter Water Quality Sonde with 7 sensor ports (including a central wiper port), optional depth sensor, no 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.

Instrument only, cables, probes/sensors, and accessories sold separately.

Overview
Go more places with the EXO2s sonde!

The more maneuverable monitoring platform.

EXO2s is a compact, 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 lightweight is optimal

What's in the Box:
- EXO2s Sonde
- Probe Guard
- Calibration and Storage Cup
- Removable Bail
- USB Drive (contains Kor Software)
- Maintenance Kit (port plugs, o-rings, lubricant)
Key Benefits

Highest Data Quality
Onboard monitoring systems verify sensor operation

Multiparameter Monitoring
7 universal ports allow for any combination of smart sensors or the central wiper

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

Discover how less size can bring more value
to your science with the following benefits:

Take off the strain with a
30% reduction in weight.

Go to new places with a
reduction in length.

Explore your environment
ith AUV's or drones.

Expand your integrated system
and maximize your limited space.

Lose the Alkalines
and save on maintenance.

Smart Sondes and Sensors
EXO is an extremely versatile instrument for unattended monitoring, 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
- fDOM
- ISEs (Ammonium, Chloride, and Nitrate)
- NitraLED (UV Nitrate)
- pH (guarded and unguarded)
- pH & ORP (guarded and unguarded)
- Rhodamine
- Total Algae (Chlorophyll + Phycocyanin and Phycoerythrin)
- Turbidity
Other Available Parameters:
- Absolute Pressure
- Ammonia
- Depth
- DO% Local
- Gauge Pressure
- nLF Conductivity
- PAR
- Resistivity
- Salinity
- Specific Conductivity
- Total Dissolved Solids
- Total Suspended Solids
- Water Density
Accuracy
EXO sondes and sensors are tested in rigorous field and 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 resist breaking
- Built-in anti-fouling systems protect data integrity
- Low power consumption extends underwater deployments
Other EXO Sonde Options
- EXO1 Sonde (4 ports) — also available without battery compartment
- EXO2 Sonde (7 ports including Central Wiper port) — also available without battery compartment
- EXO3 Sonde (5 ports including Central Wiper port) — also available without 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 challenging. Accelerate through the learning curve with our on-demand training program. Join us at YSI University!

Kor Software makes it easy to manage EXO instrumentation and water quality data. Use the traditional desktop software or the new Kor Mobile App to calibrate sensors, set up long-term deployments, and ensure equipment is operating at peak performance!

Specifications

EXO2^S Specifications
Depth Rating	250 m (820 ft)
Materials	Xenoy®, Lexan®, titanium, 316 stainless steel
Internal Logging Memory Capacity	>1,000,000 logged readings, 512 MB memory
Software	Kor Software
Application	Kor Desktop, Kor Mobile
Power Requirements	9 - 16 VDC
Communciations	Sonde: Bluetooth (Wireless); RS-485 (Field Cable) Adapters: RS-232, Modbus, USB, SDI-12
Operating Temperature	-5 to 50°C (23 to 122°F)
Storage Temperature	-20 to 80°C (-4 to 176°F)
Diameter	7.62 cm (3.00 in)
Length (with guard)	42.87 cm (16.88 in)
Weight	1.06 kg (2.34 lbs)
Sample Rate	Up to 4 Hz
Sensor Ports	7 (6 Sensors + 1 Central Wiper)
Anti-fouling	With a central wiper occupying a sensor port
Waterproof	Yes
User Calibration	Yes
Languages	English, Spanish, French, Japanese, German, Chinese
Warranty: 3 yrs	Sonde; handheld
Warranty: 2 yrs	Cables; conductivity/temperature and optical sensors; electronics base for pH, pH/ORP, ammonium, chloride, and nitrate sensors
Warranty: 1 yr	Optical DO cap and replaceable reagent modules for pH and pH/ORP sensors
Warranty: 3 mos	Replaceable reagent modules for ammonium, chloride, and nitrate sensors

EXO Parameter Measured	Sensor**	Range	Accuracy	Response	Resolution
Ammonium (freshwater only)	Ammonium Sensor Ammonia with pH sensor SKU: 599710	0 to 200 mg/L-N (0 to 30˚C)	±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
Blue-green Algae, Phycocyanin	Total Algae Sensor SKU: 599102-01	0 to 100 μg/L; 0 to 100 RFU;	Linearity: r² >0.999 for serial dilution of Rhodamine WT solution across full range	T63<2 sec	0.01 μg/L; 0.01 RFU
Blue-green Algae, Phycoerythrin	Total Algae Sensor SKU: 599103-01	0 to 280 μg/L; 0 to 100 RFU;	Linearity: r² >0.999 for serial dilution of Rhodamine WT solution acriss full range	T63<2 sec	0.01 μg/L; 0.01 RFU
Chloride (freshwater only)	Chloride Sensor SKU: 599711	0 to 1,000 mg/L-Cl (0 to 30˚C)	±15% of reading or ±5 mg/L-Cl, w.i.g.	T63<30 sec	0.01 mg/L
Chlorophyll	Total Algae Sensor SKU: 599102-01, 599103-01	0 to 400 μg/L Chl; 0 to 100 RFU	Linearity: r² >0.999 for serial dilution of Rhodamine WT solution across full range	T63<2 sec	0.01 μg/L Chl; 0.01 RFU
Conductivity¹	Wiped Conductivity / Temperature Sensor SKU: 599827	0 to 100 mS/cm	±1% of reading or 2 µS/cm, w.i.g	T95<30 sec	0.001 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) (auto-ranging)
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) (auto-ranging)
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) (auto-ranging)
Dissolved Oxygen, % air saturation	Optical Dissolved Oxygen Sensor SKU: 599100-01	0 to 500% air saturation	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 SKU: 599100-01	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
fDOM (CDOM)	fDOM Sensor SKU: 599104-01	0 to 300 ppb Quinine Sulfate equivalents (QSU)	Linearity: r²> 0.999 for serial dilution of 300 ppb QS solution Detection Limit: 0.1 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)
Nitrate (freshwater only)	Nitrate Sensor SKU: 599709	0 to 200 mg/L-N (0 to 30˚C)	±10% of reading or ±2 mg/L-N, w.i.g.	T63<30 sec	0.01 mg/L
pH	pH Sensor SKU:599701 guarded, 599702 unguarded pH/ORP Sensor SKU:599705 guarded, 599706 unguarded	0 to 14 units	±0.1 pH units within ±10˚C of calibration temperature; ±0.2 pH units for entire temperature range⁷	T63<3 sec⁸	0.01 units
ORP	pH/ORP Sensor SKU:599705 guarded, 599706 unguarded	-999 to 999 mV	±20 mV in Redox standard solution	T63<5 sec⁶	0.1 mV
Temperature	Wiped Conductivity / Temperature Sensor SKU: 599827	-5 to 50°C	±0.2°C²	T95<30 sec	0.001 °C
Turbidity⁹	Turbidity Sensor SKU: 599101-01	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 0.001 mS/cm, w.i.g.	-	0.001, 0.01, 0.1 mS/cm (auto-scaling)
Total Dissolved Solids (TDS)	Calculated from Conductivity and Temperature¹¹	0 to 100,000 mg/L Cal constant range 0.30 to 1.00 (0.64 default)	Not Specified	-	Variable
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 25˚C) 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 20˚C; 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.

Accessories

EXO GO

Wireless communication device for the EXO sondes.

EXO Handheld Display

Enhanced interface for calibrating and data logging with the EXO platform

EXO Wiped Conductivity & Temperature Sensor

EXO Wiped Conductivity & Temperature Digital Smart Sensor

EXO Optical Dissolved Oxygen Smart Sensor

EXO Optical Dissolved Oxygen Digital Smart Sensor

EXO pH Smart Sensor

EXO pH Digital Smart Sensor (Unguarded)

EXO pH & ORP Smart Sensor

EXO pH & ORP Digital Smart Sensor (Unguarded)

EXO Turbidity Smart Sensor

EXO Turbidity Digital Smart Sensor

EXO Central Wiper

Anti-fouling Wiper for the EXO2 and EXO3 Platforms

EXO Total Algae PC Smart Sensor

EXO Total Algae Phycocyanin Digital Smart Sensor - Freshwater

EXO Total Algae PE Smart Sensor

EXO Total Algae Phycoerythrin Digital Smart Sensor - Saltwater

EXO NitraLED UV Nitrate Sensor

EXO NitraLED UV Nitrate Sensor for Freshwater Environments

EXO fDOM Smart Sensor

EXO Fluorescent Dissolved Organic Matter Digital Smart Sensor

EXO Ammonium Smart Sensor

EXO Ammonium Digital Smart Sensor (ISE)

EXO Nitrate Smart Sensor

EXO Nitrate Digital Smart Sensor (ISE)

EXO Chloride Smart Sensor

EXO Chloride Digital Smart Sensor (ISE)

EXO Rhodamine Sensor

EXO Rhodamine Digital Smart Sensor

EXO Signal Output Adapter - USB

EXO DCP Signal Output Adapter 2.0

For integrating a data logger and telemetry system with an EXO sonde.

EXO Modbus Signal Output Adapter

For integrating an EXO Sonde into a SCADA system.

EXO Flying Lead Cable

Connects EXO Sonde to DCP Signal Output Adapter

EXO Vented Flying Lead Cable

Connects EXO Sonde to DCP Signal Output Adapter in Vented Applications

EXO Field Cable

Field Cable

EXO Dissolved Oxygen Sensor Cap Replacement Kit

Replaceable DO Sensor Cap

EXO Central Wiper Brush Kit

Replacement Wiper

EXO Wiper Brush Guard Replacement Kit

Replacement guards for EXO2 central wiper

EXO pH Sensor Replacement Module

Unguarded pH Module

EXO pH & ORP Sensor Replacement Module

Guarded pH/ORP Module

EXO Ammonium Sensor Replacement Module

Shallow Freshwater Only

EXO Nitrate Sensor Replacement Module

Shallow Freshwater Only

EXO Chloride Sensor Replacement Module

Shallow Freshwater Only

EXO Cable Couplers

Brass or Titanium

EXO Anti-fouling C/T Screen

Copper probe screen

EXO2 / EXO3 Anti-Fouling Guard

Copper-alloy guard

EXO Probe and Sonde Protective Sleeves

Anti-fouling sleeves

Anti-Fouling Copper Tape

Copper tape provides biofouling protection

Anti-Fouling C-Spray

Non-Toxic Biofouling Inhibitor

EXO2 / EXO3 Hard Sided Wheeled Carrying Case

Hard Sided Wheeled Carrying Case

EXO2 / EXO3 Calibration and Storage Cup

Replacement Cup

EXO2 / EXO3 Sonde Weight Kit

Profiling Accessory

EXO2 / EXO3 Flow Cell

EXO2 / EXO3 Replacement Bail

Replacement Bail

EXO 4-Pin Bulkhead Connector Port Plug

EXO Tool Kit

Replacement Tool Kit

EXO Conductivity & Temperature Sensor Cleaning Brush

Flow Cell Brush

EXO2 / EXO3 Replacement O-Ring Kit

Kor Software - USB Drive

Software

EXO Sensor Retaining Nut Kit, Titanium

Replacement sensor retaining nuts

EXO Central Wiper Retaining Nut Kit, Titanium

EXO Central Wiper Retaining Nut Replacement Kit, Titanium

EXO2 / EXO3 Guard Assembly Kit

EXO2 / EXO3 Probe Guard

EXO Replacement 6-Pin Dummy Plug Kit, Female

EXO2 Replacement 6-Pin Dummy Plug Kit, Male

EXO Replacement Sensor Tool & Magnet Kit

Replacement Tools

Krytox® Lubricant

O-Ring grease

Desiccant Canister Kit

EXO NitraLED Wiper Brush Kit

Wiper brush for EXO NitraLED UV Nitrate Sensor

Turbidity Standard

Turbidity Standard

pH Buffer

pH Buffer

Conductivity Calibrator Solution

Conductivity Calibrator Solution

NitraLED Calibration Standard

Calibration Standard for EXO NitraLED UV Nitrate Sensor
Software
Kor Software - v1.4.1.10
Oct 2024

Kor Software is designed to interface with both EXO and ProDIGITAL (DSS) instruments, including the new ProSwap Logger. Use Kor Software to view live data, import/export recorded data, calibrate sensors, manage handheld settings, set up deployments, and more! This software is included on a USB flash drive that ships with all new instruments, and the latest version can be found here on the website.

Use with the following instruments:

EXO Sondes

ProSwap Loggers

ProSwap Handhelds

ProSolo Handhelds

ProDSS Handhelds

Functions:

Calibrate Sensors

View and Record Live Data

Download and View Recorded Data

Set Up Deployments

Configure Handheld Settings

Adjust Instrument and Sensor Settings

What's New:

Kor Software replaces both KorEXO and KorDSS as the primary user interface for managing EXO and ProDIGITAL (ProSwap, ProSolo, and ProDSS) instruments and data.

Note: Be sure to update instrument firmware before attempting to download data.

Software Change Notes [PDF]

Download Kor Software
Firmware

EXO Firmware Update Package - v5.5.0.0
Apr 2024

If you've experienced problems with automatically downloading the latest firmware versions for your EXO equipment using KOR Software, you can attempt a manual update using this firmware package. This will update the EXO Sonde to version 1.0.86.

EXO Firmware Update Instructions [PDF]

EXO Firmware Change Notes [PDF]

Download EXO Firmware
Video

YSI EXO-S Series Overview

The EXO-S sondes are shorter, lighter, more affordable, and more sustainable versions of our industry-leading EXO sondes. These sondes are purpose-built without a battery compartment and provide the same sensor payload and best-in-class performance for applications where external power is available.

EXO2s Sonde Unboxing & Overview

Hi, this is Zack Henderson, product manager for YSI, a Xylem brand. And today, I'm super excited to do an unboxing video for our brand new EXO2s Sonde.