EXO Rhodamine Sensor

EXO Multiparameter Sondes

EXO advanced water quality monitoring platform for continuous field water quality measurements in challenging conditions.

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EXO Rhodamine Digital Smart Sensor

The EXO Rhodamine Sensor provides accurate, in situ measurement of Rhodamine WT in fresh, brackish, sea water, groundwater, stormwater, and wastewater.

This sensor must be installed into an EXO Sonde to function. Does not function on its own.

  • Overview

    Rhodamine WT is commonly selected for dye tracer studies due to its ease of use, low adsorptive tendency, strong fluorescence, and negligible environmental impact. Offering the widest detection range with the most sensitive detection limit, the EXO Rhodamine Sensor is ideal for monitoring the movement of water as well as dispersion and mixing characteristics.

    Suitable for a variety of applications:

    • Time-of-travel (TOT) studies
    • Hydraulic characterization
    • Mixing zone identification
    • Pollution plume tracing
    • Spill mapping

    Notable Specifications:

    Range: 0 to 1,000 µg/L or 0 to 100 RFU

    Resolution: 0.01 µg/L or 0.01 RFU

    Accuracy: +/- 5% or 0.1 µg/L w.i.g

    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

  • Specifications

    +/- 5% or 0.1 µg/L w.i.g

    Depth Rating 250m


    Measurement Range

    0 to 1,000 µg/L or 0 to 100 RFU

    Minimum Detection Limit

    0.01 µg/L

    Operating Temperature -5 to 50°C

    0.01 µg/L or 0.01 RFU

    Storage Temperature -20 to 80°C
    Unit of Measure µg/L, ppb, RFU
    User Calibratable 4-point calibration

    2 years

  • Accessories

    EXO2 Multiparameter Sonde

    Multiparameter Water Quality Sonde for Unattended Monitoring with 7 sensor ports (including a central wiper port)

    EXO3 Multiparameter Sonde

    Multiparameter Water Quality Sonde with 5 sensor ports (including a central wiper port)

    EXO Tool Kit

    Replacement Tool Kit

    EXO1 Multiparameter Sonde

    Multiparameter Water Quality Sonde with 4 sensor ports

  • Video

    EXO Sondes: Smart Ports - Smart Sensors

    In this demonstration, Tim Finegan (YSI Director of Environmental Monitoring) demonstrates the smart sensor technology of the EXO water quality sondes.

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