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Rosemount™ 398 pH/ORP Sensor
398 & 398VP pH/ORP Sensor
The Rosemount 398 pH Sensor / ORP Sensor, with integral cable, features a chemical-resistant construction of Tefzel™ and titanium.
This pH/ORP sensor is ideal for measuring pH in harsh process liquids and can be used to measure pH levels in sour water strippers, pulp bleaching towers that use chlorine dioxide, and process streams containing a variety of organic solvents.

Rosemount(TM) Analytical Minds on pH Sensors: Know when to clean or replace, reduce downtime

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Rosemount(TM) Analytical Minds on pH Sensors: Keep optimal pH levels and improve process efficiency

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Rosemount(TM) Analytical Minds on pH Sensors: Calibrate pH sensors and maintain measurement accuracy

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Rosemount™ 398 pH/ORP Sensor

Specs

Measurement Range
pH sensor: 0 to 14
ORP sensor: -1500 to +1500 mV
Temperature Range
32 to 212 °F (0 to 100 °C)
Pressure Range
Hemi Bulb - 0 to 250 psig (100 to 1825 kPa [abs])
Flat Bulb - 0 to 100 psig (100 to 790 kPa [abs])
Materials of Construction
Wetted Materials: Titanium, Tefzel™, glass, and a choice of Kalrez®, Viton™, or EPDM; platinum for ORP sensor only

Features

  • pH sensor / ORP sensor has superior chemical resistance and can withstand applications containing chlorine dioxide and a wide variety of organic solvents and oxidizing agents
  • Minimum maintenance due to reference junction technology ensures long pH/ORP sensor life in coating, fouling, and poisoning processes
  • Maximum pH/ORP sensor life due to helical reference pathway which hinders reference poisoning