Rosemount 389-01-12-55 ORP Sensor Triple Junction General Purpose

Product Overview

• The Rosemount 389-01-12-55 is a high-performance ORP sensor for tough industrial liquids.
• A triple junction reference stops poisoning ions from damaging the internal sensor logic.
• The Tefzel body and Viton O-rings provide excellent resistance to harsh chemicals.
• This sensor features cracking-resistant glass to ensure a long service life in high-pressure lines.
• Advanced SMART technology allows for plug-and-play installation without field calibration delays.

Technical Specifications

• Brand: Rosemount
• Model: 389-01-12-55
• Measurement Type: Oxidation Reduction Potential (ORP)
• ORP Range: -1500 to +1500 mV
• Temperature Range: 32 to 185 °F (0 to 85 °C)
• Wetted Materials: Tefzel (Body), Viton (O-rings), Platinum (Electrode)
• Connection: 1-in. MNPT Front and Rear Facing
• Preamplifier: Integral with 25-ft (7.6m) Cable
• Maximum Pressure: 90 psig at 158 °F
• Interference Immunity: Built-in solution ground for stable signal output
• Resolution: High-sensitivity platinum tip for precise voltage detection

Compatibility and System Integration

• Fully compatible with Rosemount 56, 1056, 1057, 1066, and 5081 transmitters.
• Automatic sensor recognition reduces setup time for engineering personnel.
• Stores internal pH/ORP calibration data for immediate use upon connection.
• Fits standard 1-inch NPT adapters and industrial flow cells.

Installation and Maintenance Guide

• Support for insertion, submersion, and flow-through mounting styles.
• The 1-inch MNPT threads allow easy fitting into pipes or tanks.
• Clean the platinum electrode regularly to maintain fast response times.
• Check O-ring seals during routine inspections to prevent process leaks.

Applications and Diagnostics

• Ideal for wastewater treatment and chemical neutralizing tanks.
• Used in cooling towers to monitor oxidation levels effectively.
• Advanced diagnostics track sensor health via the connected Rosemount transmitter.
• Alerts users to coating or depletion before process downtime occurs.

Shipping and Service Terms

• Warranty: 12-month standard quality guarantee.
• Express Shipping: Global delivery via FedEx, UPS, and DHL.
• Packaging: Secure industrial-grade boxing with factory inspection report.

Frequently Asked Questions

• Is the cable included? Yes, this model includes a 25-foot integral cable.
• Can I use this in high pH? Yes, the glass electrode option handles high pH levels.
• Is it SMART enabled? Yes, it works with all SMART-compatible Rosemount transmitters.