Overview

The Bently Nevada 3300/20-12-01-02-03-02 Dual Thrust Position Monitor is designed for high-precision axial position monitoring in critical rotating machinery such as turbines, compressors, and expanders. It accepts inputs from two Proximitor® systems and employs AND voting logic, meaning an alarm is activated only when both probes detect abnormal thrust movement—minimizing false alarms and improving diagnostic confidence.

This monitor is fully API 670 compliant, integrates seamlessly with 3300 racks, and supports real-time condition diagnostics via System 1 software. Its durable industrial design and CE certification ensure reliable operation in demanding environments.

For example, in steam turbine applications, the 3300/20 monitor detects excessive axial displacement that could damage thrust bearings, enabling operators to shut down the machine before catastrophic failures occur.

Technical Data

Typical Applications

• Steam & gas turbines – Prevent thrust bearing damage by monitoring axial displacement

• Compressors & expanders – Detect thrust excursions during transient or unstable operation

• Motors & generators – Maintain safe shaft movement limits

• Petrochemical / power plants – API 670-compliant protection systems

• OEM machinery – Embedded for critical thrust diagnostics

The 3300/20-12-01-02-03-02 is trusted for its precision, durability, and seamless compatibility with the Bently Nevada ecosystem—making it a core component for thrust protection in high-value rotating assets.

FAQ

Q: What does the 3300/20 monitor?
A: Axial thrust position using two proximity probe inputs.

Q: What is AND voting logic?
A: Alarms activate only when both channels detect abnormal thrust changes.

Q: Is it API 670 compliant?
A: Yes, it is designed to meet API 670 thrust position monitoring requirements.

Q: What probes are supported?
A: Compatible with 5 mm and 8 mm Proximitor® systems.

Q: What is the warranty period?
A: Standard 1-year warranty.