EXO pH Sensor Replacement Module

EXO Multiparameter Sondes

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

Price$205.00 (US Only)


In Stock 0 - Available for Backorder

Un-Guarded pH Module

User-replaceable tip for #599702 - EXO un-guarded pH sensor

  • Overview

    Smart, cost-saving technology for water quality measurements.

    Exhaustible reagents are stored in this replaceable module and can be swapped-out as needed. Electronics & data are stored separately in the smart sensor base. Grants long-term costs savings by eliminating the need to re-buy the entire sensor after the reagents are depleted (approximately 12-18 months for pH, depending on use).


    • For use in EXO2 systems with a central wiper installed.
    • EXO sensors and modules are not backwards compatible with 6-Series sondes.

  • Specifications
    Depth / Pressure Rating / Limit 250m (820ft)
    Desktop Software Compatible KOR for EXO
    Digital / Digital Sensors Yes
    Equipment used with 599702
    Measurement Range

    0 to 14 units

    Monitoring Yes

    ±0.1 pH units within ±10°C of calibration temp; ±0.2 pH units for entire temp range
    (Within the environmental pH range of pH 4 to pH 10.)


    0.01 units

    Response Time T63<3 sec (On 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.)
    Smart Sensors / Ports Yes
    User Calibratable Yes
    User Replaceable Yes

    1 Year - Replaceable reagent modules for pH

    Waterproof Yes, when installed
  • Video

    EXO Sondes: Replacing the Sensor Module

    Brandon Smith, YSI, demonstrates the step-by-step process for successfully replacing the sensor module on a pH and pH/ORP probe for the EXO water quality sonde products.

    EXO Sensor Replaceable Reagent Module

    In this video you will discover one of the many smart features of the EXO advanced water quality monitoring platform, designed to save you money and time. The EXO pH, ORP, ammonium, chloride and nitrate sensors come with replaceable reagent modules. The exhaustible reagents are stored in a module at the top of the sensor. The electronics and sensor data are stored separately in a smart base. When the reagents are used up, you can easily remove the top of the sensor and plug in a new reagent module. Cost savings over 5 years is approximately 500 dollars.

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EXO2 Multiparameter Sonde

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

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pH Buffer


Krytox® Lubricant

O-Ring grease


EXO pH Smart Sensor

EXO pH Digital Smart Sensor (Unguarded)