EXO PAR System

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YSI has leveraged the versatility of the EXO platform to bring users photosynthetically active radiation (PAR), using the popular Li-COR sensors. Used in the context of this industry-leading water quality platform, one can assess light attenuation, primary productivity, Photosynthesis-Irradiance curves and a host of other light-dependent processes with one complete solution.

  • Overview

    Enhanced Versatility

    The EXO PAR System consists of an adapter that communicates through the EXO2 Auxiliary Port and a unique frame that supports the Photosynthetically Active Radiation sensor(s). The EXO manual describes how to use LiCOR sensor coefficients so that the sonde will deliver PAR outputs to either the EXO handheld or Kor Software, making the Photosynthetically Active Radiation sensor operate similarly to the EXO Smart Sensors. The SmartQC system does not support the Photosynthetically Active Radiation sensor.

    Convenient Sampling Experience

    • Folding frame system for easy portability
    • Simple setup and operation
    • Depth rating of 250 meters
    • Single or dual sensor option
    • Non-corrosive materials
    • Easily removed for non-par applications

    EXO Smart Sensor Suite

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

    Designed for Use with EXO Multiparameter Sondes
    EXO2 sonde has 7 ports for the ultimate monitoring platform *EXO PAR only works with EXO2 sondes

  • Specifications
    Calibration Absolute calibration - ±5%
    Depth / Pressure Rating / Limit 250 meters
    Equipment used with EXO Handheld, EXO2 Sonde, new or existing, KorEXO software

    Maximum deviation of 1%


    Typically 4 A per 1,000 mol s-¹ m-² in water

    Response Time 10 μs
    Unit of Measure μmoles/sec/m²

    1 year EXO PAR, 2 year EXO Sonde

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