Product News

Rosemount 389 Series General Purpose pH/ORP Sensor

News August 18, 2025

Rosemount-389 General Purpose pH ORP Sensor

Rosemount™ 389 General Purpose pH/ORP Sensor


Product Description

The Rosemount 389 pH Sensor / ORP Sensor, with integral cable, is 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 sensor designs. The simplified construction, designed with user convenience in mind, does not require electrolyte (KCl) replenishment or any high maintenance troubleshooting procedures



Specifications

Temperature Range32 - 182 °F (0 - 85 °C)

Max. Operating Pressure100 psig (790 kPa) at 150 °F (65 °C)

Materials of ConstructionpH sensor body: Tefzel™

pH electrode: glass

ORP electrode: platinum

Junction: ceramic

O-Ring: Viton™

Process ConnectionFront- & rear-facing: 1 in (MNPT)



Features

  • Triple junction reference prolongs pH sensor / ORP 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” MNPT front and rear facing process connections for insertion, submersion, and flow-through applications

  • Integral cable connection available in various lengths

  • SMART enabled for pH measurements


Rosemount

Transmitters

Rosemount 1057 Triple Channel Transmitter

Rosemount 1056 Dual Channel Transmitter

Rosemount 1066 Single Channel Transmitter

Rosemount 5081 Explosion-proof Transmitter

Rosemount 56 DualChannel Transmitter


Conductivity Sensors

Rosemount 140 Conductivity Sensor-Retractable

Rosemount 141 Conductivity Sensor-Insertion

Rosemount 142 Conductivity Sensor-Insertion

Rosemount 150 Conductivity Sensor- Insertion/Submersion

Rosemount 222 Conductivity Sensor-Toroidal Flow Through

Rosemount 225 Conductivity Sensor-Toroidal Clean-in-Place

Rosemount 226 Conductivity Sensor-Toroidal Submersion/lnsertion

Rosemount 228 Conductivity Sensor-Toroidal Insertion/Submersion

Rosemount 242 Conductivity Sensor-Toroidal Flow Through

Rosemount 245 Conductivity Sensor-Toroidal Flow Through-Sanitary

Rosemount 400 Conductivity Sensor-Endurance Screw-in

Rosemount 402 Conductivity Sensor-Endurance Retractable

Rosemount 403 Conductivity Sensor-Endurance Sanitary Flange

Rosemount 404 Conductivity Sensor-Endurance Low Flow

Rosemount 400VP Conductivity Sensor-Endurance Screw-in VP Connector

Rosemount 402VP Conductivity Sensor-Retractable VP Connector

Rosemount 403VP Conductivity Sensor-Sanitary Flange VP Connector

Rosemount 410VP Conductivity Sensor-PUR-SENSETM Four-Electrode Sanitary Flange


pH&ORPSensors

Rosemount 328A pHSensor-Steam Sterilizable

Rosemount 3300HT pH/ORPSensor-PERpH-XTM High Performance

Rosemount 3300HTVP pH/ORPSensor-PERpH-XTM High Performance with VP

Rosemount 3400HT pH/ORP Sensor-PERpH-XTM High Performance Retractable

Rosemount 3400HTVP pH/ORPSensor-PERpH-XTM with VP

Rosemount 3500P pH/ORP Sensor-PERpH-XTM Insertion/Submersion

Rosemount 3500VP pH/ORP Sensor- PERpH-XTM Insertion/Submersion With VP

Rosemount 372 pHSensor-Fluoride Service

Rosemount 385+ pH/ORPSensor

Rosemount  389 pH/ORP Sensor

Rosemount  389VP pH/ORP Sensor

Rosemount  3900 General Purpose pH/ORP Sensor

Rosemount  3900VP General Purpose pH/ORP Sensor with VP

Rosemount  396 pH Sensor - TUpH Insertion/Submersion/Flow Through

Rosemount  396P pH/ORPSensor-TUpH Insertion/Submersion/Flow-Through

Rosemount  396PVP pH/ORPSensor-TUpH VP Connector

Rosemount 396R pH/ORPSensor-TUpH Retractable

Rosemount 396RVP pH/ORPSensor-TUp HRetractable VP Connector

Rosemount 396VP pH Sensor-TUpH VP Connector

Rosemount 397 pH/ORPSensor-TUpH for Quik-loc Kit

Rosemount 398 pH/ORPSensor-TUpH

Rosemount 398R pH/ORPSensor-TUpH Retractable

Rosemount 398RVP pH/ORPSensor-TUpH Retractable VP Connector

Rosemount 398VP pH/ORPSensor-TUpH with VP Connector

Rosemount 550PH Single Use pH Sensor

Rosemount Hx338+ pHSensor-SteamSterilizable/Autoclavable

Rosemount RBI pH sensor PVDF Kynar

Rosemount TF396 pH Sensor - TUpHFET Non-glass IsFET


Dissolved Oxygen

Rosemount 499ADO Dissolved Oxygen Sensor

Rosemount 499AOZ Dissolved Ozone Sensor

Rosemount 499ATrDo Dissolved Oxygen Sensor-Trace DO

Rosemount 550DW Single Use Dissolved Oxygen Window

Rosemount Hx438 Dissolved Oxygen Sensor-Steam Sterilizable/Autoclavable

Rosemount RDO Optical Dissolved Oxygen System



Chlorine

Rosemount 499ACL Chlorine Sensor

Rosemount FCL Free Chlorine System

Rosemount MCL Monochloramine System

Rosemount TCL Total Chlorine System


Systems

Rosemount BB11 Floating Ball System

Rosemount CVU Conductivity Validation Unit

Rosemount HRMS HandRail Mounting System

Rosemount T56 ClarityIITM Turbidity Measurement System

Rosemount T1056 Clarity IITM Turbidity Measurement System

Other

Rosemount SQP10036-LQD BenchTop Calibrator



Combustion Analyzers

Rosemount CX1100 In-Situ Oxygen Analyzer

Rosemount 6888A In-Situ Flue Gas Oxygen Transmitter

Rosemount 6888C In-Situ Flue Gas Oxygen Transmitter

Rosemount 6888Xi 6888 Xi Electronics-General Purpose

Rosemount XI Xi Electronics (General Purpose)

Rosemount XSO2CAL Xi Autocalibration Accessories

Rosemount 5081FG In-Situ Oxygen Analyzer -Hi-Temp 2-Wire HART® Smart (550-1600°C

Rosemount OCX88A Oxygen/Combustibles Transmitter

Rosemount 0CX88C Oxygen /Combustibles Transmitter -Explo-Proof

Rosemount OXT4A In-Situ Oxygen Transmitter - HART® Smart

Rosemount OXT4C In-Situ Oxygen Transmitter -Explo-Proof - HART® Smart

Rosemount OXT4CNF In-Situ Oxygen Transmitter-Oxymitter 4000

Rosemount OXT4ADR In-Situ Oxygen Transmitter -Direct Replacement Probe 115 VAC Only

Rosemount OXT4CDR In-Situ Oxygen Transmitter - Direct Replacement Probe - Explo-Proof 115 VAC Only

Rosemount OXT4CDRNF In-Situ Oxygen Transmitter -DR Probe, Optional Xi Electronics, Safe Area only



Rosemount Electromagnetic flowmete , 8800D

Rosemount 8700M electromagnetic flowmeter platform

Rosemount Wireless Level Detector   2160

Rosemount Rosemount Tank Gauging System :

Rosemount 5900 Radar Level Gauge  2410

Rosemount 5408 and 5408:SIS level transmitters

Rosemount 5300 Level Transmitter

Rosemount Flow Meters and Primary Elements   3051SF

Rosemount Micro Motion Flow Meters 2700 Transmitters


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We are professional in Industrial Automation & Electrical Distribution instruments, our product mainly including: Pressure / Temperature Transmitters, Flowmeters, Analyzers, DCS Modules, PLC, Controller, Feild Communicators, Gas Detectors/ Sensors, Safety Barrier and Isolator, Multimeters, Calibrators, Recorder, Soft Starters, Inverters, Positioners, Valves, Circuit Breakers, Contactors, Switches, Power Supply, HMI, Terminal Block, Relay etc.Please feel free to inquiry us by E-mail: lily@hkxytech.com



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HONGKONG XIEYUAN TECH CO., LIMITED


Contact: Ms. Lily

Email: lily@hkxytech.com

WhatsApp/Skype: +86 13789949182