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Hach Differential pH and ORP Sensors


    Product Information


    • Drinking water
    • Wastewater
    • Industrial water
    • Power

    Hach Digital pHD sc sensors are available in convertible (PEEK® or Ryton®), insertion, and sanitary body styles. Three electrodes are used in these sensors to increase measurement accuracy and eliminate sensor ground loops.

    This field-proven technique uses three electrodes instead of the two normally used in conventional pH sensors. Process and reference electrodes measure the pH differentially with respect to a third ground electrode. The end result is unsurpassed measurement accuracy, reduced reference junction potential, and elimination of sensor ground loops. These sensors provide greater reliability, resulting in less downtime and maintenance.


    • Patented Technology
    • Differential electrode measurement technique
    • Patented technology
    • Replaceable salt bridge/protector
    • Built in encapsulated preamp
    • Durable body materials Versatile mounting styles
    • Differential sensor warranty
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