YSI EXO Nitrate Smart Sensor
YSI EXO Nitrate Smart Sensor


YSI EXO Nitrate Smart Sensor

The EXO guarded Nitrate ISE (ion-selective electrode) Sensor is a digital smart sensor featuring welded titanium construction and wet-mateable connectors. Complete calibration in less than 15 minutes using EXO's suite of smart sensors and intuitive Kor Software.

Note: Intended for sampling applications. Not for use in an EXO system with a central wiper installed.

  • Measures NO3 in freshwater applications
  • Depths not to exceed 17 meters (55 ft) or 25 psi
  • 3 month warranty on sensing module

Compact and Accurate
The EXO platform offers a completely new approach - highly accurate, quick-response sensors in a small, easy-to-deploy and easy-to-maintain package. Gone are large and complicated sensor arrangements requiring complex integration.

Smart Probes
All EXO sensors have onboard memory and processing, allowing users to easily calibrate and configure sensors at one location and distribute to various field sites. Smart sensors are auto-recognized from any port of an EXO sonde making sensor payloads interchangeable and completely customizable.

Smart Ports
Wet-mateable connectors allow for swaps in wet conditions, while the smart ports shut down any excessive current draws to prevent damage.

Designed for Use with EXO Multiparameter Sondes
• EXO1 sonde has 4 ports and a smaller diameter
• EXO2 sonde has 7 ports for the ultimate monitoring platform
• 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


Connector Yes
Depth / Pressure Rating / Limit 17 meters
Desktop Software Compatible Yes
Digital / Digital Sensors Yes
Equipment used with EXO2, EXO1
Measurement Range

0 to 200 mg/L-N (0-30°C)

Medium Fresh water
Operating Temperature 0 to 30°C
Parameters Measured Nitrate
Precision ±10% of reading or 2 mg/L-N, w.i.g.
Response Time T63<30 sec
Sampling Yes
Storage Temperature 0 to 30°C
Unit of Measure mg/L-N, millivolts
User Calibratable Yes

3 Months - Replaceable ISE reagent module

2 Years - Electronics base

Waterproof Yes

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