EXO1s Multiparameter Sonde

Multiparameter Water Quality Sonde with 4 sensor ports and optional depth sensor

Add to Request

Note: External Power Required

EXO Multiparameter Sondes — the best-in-class platform for the highest quality data. EXO’s dynamic range of smart sensors provides 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.


Go more places with the EXO1s sonde!

The more maneuverable monitoring platform.

EXO1s is a compact, batteryless sonde that comes with the same warranty and capabilities as the EXO1, 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:

  • EXO1s Sonde
  • Probe Guard
  • Calibration and Storage Cup
  • Removable Bail
  • USB Drive (contains Kor Software)
  • Maintenance Kit (port plugs, o-rings, lubricant)

Key Benefits

exo multiparameter sonde data datasonde

Highest Data Quality
Onboard monitoring systems verify sensor operation


Multiparameter Monitoring
4 universal ports allow for any combination of smart sensors


exo anti-fouling antifouling

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:

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


 YSI Integrated Systems
Go new places, with a
33% reduction in length.​


YSI Integrated Systems
Explore your environment,
with AUV’s or drones.


EXO University
Expand your integrated system,
and maximize your limited space.

EXO University
Lose the Alkalines,
and save on maintenance.


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
• fDOM
• ISEs (Ammonium, Chloride, and Nitrate)
• pH
• pH & ORP
• Rhodamine
• Total Algae (Chlorophyll + Phycocyanin or Phycoerythrin)
• Turbidity

Other Available Parameters
• Absolute Pressure
• Ammonia
• Depth
• DO% Local
• Guage Pressure
• nLF Conductivity
• Resistivity
• Salinity
• 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



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

Kor Software

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
Power Requirement

9 – 16 V

Operating Temperature -5 to 50°C (23 to 122°F)
Storage Temperature -20 to 80°C (-4 to 176°F)
Depth Rating 0 to 250 m (0 to 820’)

Sampling Rate

Up to 4 Hz

Smart Sensor Ports



4.75 cm (1.87”)

Length (with Guard) Without depth sensor – 44.77 cm (17.63”)
With depth sensor – 46.41 cm (18.27”)
Warranty 3 years

Ordering Info

577501-00 EXO1S Sonde, No Battery, No Depth, 4 Sensor Ports
– No depth sensor installed
– Contains: Sonde, Calibration Cup, Tool Kit, 2 Port Plugs, USB drive loaded with Manual and KOR Software
577501-01 EXO1S Sonde, No Battery, 10 meter Depth, 4 Sensor Ports
– Depth range: 0-10 meters
– Contains: Sonde, Calibration Cup, Tool Kit, 2 Port Plugs, USB drive loaded with Manual and KOR Software
577501-02 EXO1S Sonde, No Battery, 100 meter Depth, 4 Sensor Ports
– Depth range: 0-100 meters
– Contains: Sonde, Calibration Cup, Tool Kit, 2 Port Plugs, USB drive loaded with Manual and KOR Software
577501-03 EXO1S Sonde, No Battery, 250 meter depth, 4 Sensor Ports
– Depth range: 0-250 meters
– Contains: Sonde, Calibration Cup, Tool Kit, 2 Port Plugs, USB drive loaded with Manual and KOR Software


Scroll to Top