Rosemount 398VP-10-31-54 pH/ORP Sensor The Rosemount 398VP-10-31-54 is a robust pH/ORP sensor engineered for accurate measurements in challenging industrial environments. Its durable construction and advanced features make it ideal for applications involving harsh chemicals and demanding process conditions. Key Features Superior Chemical Resistance: Constructed with Tefzel™ and titanium, the sensor withstands exposure to aggressive substances such as chlorine dioxide and various organic solvents. Advanced Reference Junction Technology: The TUpH™ reference junction minimizes maintenance by preventing coating, fouling, and poisoning, ensuring prolonged sensor life. Helical Reference Pathway: This design feature hinders the intrusion of poisoning agents like sulfide, mercury, cyanide, and ammonia, enhancing measurement stability. Variopol (VP8) Cable Connection: Facilitates quick sensor replacement and eliminates cable twisting, streamlining maintenance procedures. Specifications Measurement Range: pH: 0 to 14 ORP: -1500 to +1500 mV Temperature Range: 32 to 212°F (0 to 100°C) Pressure Range: Hemi Bulb: 0 to 250 psig (0 to 17.24 barg) Flat Bulb: 0 to 100 psig (0 to 6.89 barg) Wetted Materials: Titanium, Tefzel™, glass, and a choice of Kalrez®, Viton™, or EPDM; platinum for ORP sensor only Applications The Rosemount 398VP-10-31-54 sensor is well-suited for measuring pH and ORP levels in various demanding processes, including: Sour water strippers Pulp bleaching towers utilizing chlorine dioxide Process streams containing a variety of organic solvents Its robust design and advanced features ensure reliable performance and extended service life in these challenging environments.