6589 Fast-Response pH Sensor

6-Series Legacy Sondes

View YSI 6-Series water quality sondes being used in a variety of water environments for long-term underwater monitoring and spot sampling.

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Simple, accurate pH measurement in sensors designed for minimal maintenance in sampling, profiling, and long-term monitoring applications.

This sensor must be installed into a 6-Series sonde to function. Does not function on its own.

  • Overview

    YSI pH and pH/ORP sensors have been carefully designed to perform under all ionic strength conditions, from seawater with a conductivity of 53,000 μS/cm, to "average" freshwater lakes and rivers with conductivities of 200 to 1500 μS/cm, to pure mountain streams with conductivities as low as 15 μS/cm, which has historically been the most difficult medium with respect to accuracy, quick response to pH changes, and minimal flow dependence.

    6589FR Fast Response pH Sensor:
    Amplified sensor provides fast response and increased stability over standard pH sensors, despite the wear and tear of your instrument.


    • Faster response time in sampling and profiling applications
    • Maintains fast response time in Low Ionic Strength (LIS) and cold waters
    • Maintains fast response time throughout life of sensor
    • Stable readings and like-new performance in instruments with aging or contaminated connectors

    Sensor is available for use on the following sondes:

    • 600XL & 600XLM
    • 600DW & 6920DW
    • 6820 V2 & 6920 V2
    • 6600 V2 & 6600EDS V2

    General Specifications:
    Range: 0 to 14 units
    Resolution: 0.01 unit
    Accuracy: ±0.2 unit

    U.S. EPA ETV

  • Specifications
    Depth / Pressure Rating / Limit 60 m
    Equipment used with 6920's, 6820's, All 6600's
    Medium Fresh and Salt Water
    Monitoring Yes
    Operating pH Range 0 to 14 units
    Operating Temperature -5 to 50°C (23 to 122°F)
    Parameters Measured pH
    Precision ±0.2 unit
    Response Time T95<10 seconds in 800 mS water
    Sampling Yes
    Storage Temperature -5 to 50°C (23 to 122°F)
    User Calibratable Yes
    User Replaceable Yes
    Warranty 1 year

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