EXO pH & ORP Smart Sensor

EXO Multiparameter Sondes

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

Price$795.00 (US Only)


In Stock 0 - Available for Backorder

EXO pH & ORP Digital Smart Sensor (Guarded)

For unguarded version, please see our EXO pH &ORP Smart Sensor.

Note: This product is intended for sampling applications.
This sensor must be installed into an EXO Sonde to function. Does not function on its own.

  • Overview

    The EXO guarded pH & ORP 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: This guarded model is for sampling applications, not for use in an EXO2 or EXO3 system with a central wiper installed. For unguarded version, please see our EXO pH &ORP Smart Sensor.

    • 0 to 14 unit measurement range
    • T63<3 sec response time for pH, T63<5 response time for ORP
    • ±0.1 pH unit accuracy within ±10°C of calibration temperature
    • ±20 mV ORP unit accuracy in Redox standard solutions

    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
    Connector Yes
    Desktop Software Compatible Yes
    Digital / Digital Sensors Yes
    Equipment used with EXO1, EXO2
    Medium Fresh, sea or polluted water
    Operating Temperature -5 to +50°C
    Parameters Measured pH, ORP
    Precision ±0.1 pH units within ±10°C of calibration temp; ±0.2 pH units for entire temp range; ±20 mV in Redox standard solution
    Response Time T63<5 sec
    Sampling Yes
    Storage Temperature 0 to 60°C
    Unit of Measure pH units / ORP millivolts
    User Calibratable Yes

    2 Years - Electronics base
    1 Year - Replaceable reagent module

    Waterproof Yes
  • 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.

You may also need

EXO pH & ORP Sensor Replacement Module

Guarded pH/ORP Module


EXO Handheld Display

Enhanced interface for calibrating and data logging with the EXO platform


EXO1 Multiparameter Sonde

Multiparameter Water Quality Sonde (4 sensor ports)

Request Pricing

Zobell Solution, ORP Calibrator

Zobell Solution, ORP Calibrator

$41.75 - $93.75

pH Buffer

pH Buffer