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389/389VP General-Purpose pH/ORP Sensor

Brand: Rosemount
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Models 389 and 389VP are housed in a molded Tefzel® body with Viton® o-rings, making each sensor virtually indestructible and chemically resistant. 

Complete encapsulation eliminates leakage or high humidity problems traditionally found in other pH/ORP designs. 

The simplified construction, designed with user convenience in mind does not require electrolyte (KCl) replenishment or any high maintenance troubleshooting procedures.
Features
  • A triple junction reference prolongs sensor life and protects against poisoning ions such as ammonia, chlorine, cyanides, and sulfides
  • Enhanced performance and increased life with cracking resistant glass
  • Available with a glass electrode option for high pH applications
  • Superior chemical resistance provided by a rugged Tefzel body with Viton O-rings
  • The molded sensor body features 1" Male NPT front and rear facing process connections for insertion, submersion, and flow-through applications
  • Variopol (VP6) cable connection option, for quick cable-to-sensor release, eliminates cable twisting
  • SMART enabled for pH measurements 
Models 389 and 389VP are housed in a molded Tefzel® body with Viton® o-rings, making each sensor virtually indestructible and chemically resistant. 

Complete encapsulation eliminates leakage or high humidity problems traditionally found in other pH/ORP designs. 

The simplified construction, designed with user convenience in mind does not require electrolyte (KCl) replenishment or any high maintenance troubleshooting procedures.
Features
  • A triple junction reference prolongs sensor life and protects against poisoning ions such as ammonia, chlorine, cyanides, and sulfides
  • Enhanced performance and increased life with cracking resistant glass
  • Available with a glass electrode option for high pH applications
  • Superior chemical resistance provided by a rugged Tefzel body with Viton O-rings
  • The molded sensor body features 1" Male NPT front and rear facing process connections for insertion, submersion, and flow-through applications
  • Variopol (VP6) cable connection option, for quick cable-to-sensor release, eliminates cable twisting
  • SMART enabled for pH measurements 
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Specifications

Brand

Approvals & Certifications

  • ATEX
  • CSA
  • FM
  • IECEx

Enclosure, Body Material

  • Tefzel

Materials of Construction

  • Junction: Ceramic
  • ORP Electrode: Platinum
  • pH Electrode: Glass

Maximum System Pressure

  • psia: 114.6 (kPa: 790, bar: 1.15) at 65° C (150° F)
  • psig: 100 (kPa: 689, bar: 6.89) at 65° C (150° F)

Measuring Range

  • 0 to 14 pH
  • ORP: -1,500 to 1,500 mV

NPT Connection

  • 1" NPT Male

O-Ring Material

  • Viton

Temperature Range

  • 0° to 85° C (32° to 185° F)
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