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Rosemount™ 398R Retractable pH/ORP Sensor
rosemount 398r and 398rvp sensor
rosemount 398r and 398rvp sensor
The Rosemount 398R pH Sensor / ORP Sensor, with integral cable, features chemical-resistant construction of Tefzel™, titanium, and a TUpH™ reference junction.
This pH/ORP sensor is ideal for measuring pH in harsh process liquids like 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™ 398R Retractable pH/ORP Sensor

Specs

Measurement Range
pH sensor: 0 to 14
ORP sensor: -1500 to +1500 mV
Temperature Range
32 - 212 °F (0 -100 °C)
Operating Pressure
Hemi-bulb: 0 to 250 psig (0 to 17.24 barg)
Flat-bulb: 0 to 100 psig (0 to 6.89 barg)
Max Operating Pressure
(at retraction or insertion)
21 in. tube 64 psig (4.41 barg)
36 in. tube 35 psig (2.41 barg)

Features

  • uperior chemical resistance allows pH sensor and ORP sensor to withstand applications containing chlorine dioxide and a wide variety of organic solvents and oxidizing agents
  • Minimum maintenance due to TUpH reference technology helps ensure pH/ORP sensor has a long life in coating, fouling and poisoning processes
  • Helical reference pathway hinders reference poisoning and cracking resistant glass for a long pH/ORP sensor life