May 29, 2026

Bently Nevada 3300/20-11-01-02-00-02 Dual Thrust Position Monitor

The Bently Nevada 3300/20-11-01-01-00-00 is a high-precision dual-channel thrust position monitor belonging to the 3300 Series Turbine Supervisory Instrumentation developed by Baker Hughes, formerly GE Bently Nevada. Adopting eddy current non-contact measurement technology, this module is dedicated to continuous online monitoring of shaft axial thrust position on critical rotating machinery. It tracks the axial displacement of the rotor relative to thrust bearings, and delivers early alerts for excessive axial load, thrust bearing wear and other abnormal conditions, so as to prevent severe failures such as rotor and stator collision. Equipped with two independent signal input channels and high-performance signal conditioning circuits, the unit features full-range signal linearization and stable measurement performance. It supports hot-swap installation on standard 19-inch racks and can work compatibly with other modules of the 3300 series. Built-in comprehensive self-diagnosis functions ensure reliable operation. Compliant with API 670 industrial standards, this monitor is widely deployed for status monitoring and safety protection of large rotating equipment across multiple industrial fields.

Description

Bently Nevada 3300/20-11-01-02-00-02 Dual Thrust Position Monitor

Product Overview

The Bently Nevada 3300/20-11-01-02-00-02 is a high-reliability dual-channel thrust position monitor in the 3300 Series TSI (Turbine Supervisory Instrumentation) platform by Baker Hughes (formerly GE Bently Nevada). It is designed for non-contact, continuous online monitoring of axial (thrust) position on critical rotating machinery, measuring rotor axial displacement relative to thrust bearings to provide early warning of thrust bearing wear, abnormal axial loads, or potential rotor-stator contact. This model features two independent eddy-current proximity probe inputs, high-accuracy signal conditioning, configurable alarm and trip logic, comprehensive self-diagnostics, and one relay output. Hot-swap capable in a 19-inch standard rack, it integrates seamlessly with other 3300 series modules and System 1 software. Fully compliant with API 670, it ensures reliable protection for turbines, compressors, and other high-value assets.

Basic Information

Model: 3300/20-11-01-02-00-02
Manufacturer: Bently Nevada (Baker Hughes, formerly GE)
Series: 3300 Series TSI System
Product Type: Dual-Channel Thrust Position Monitor
Mounting: 19-inch standard rack, hot-swap capable
Power Supply: –24 VDC (±10%), via system backplane
Weight: Approx. 1.0 kg
Dimensions: 51 mm × 203 mm × 330 mm (2.0" × 8.0" × 13.0")
Protection Class: IP20 (indoor cabinet use)
Compliance: API 670, CE, UL, CSA, RoHS

Function & Positioning

This module serves as a core axial displacement monitoring and protection device for rotating machinery, safeguarding against thrust bearing failure and severe mechanical damage. It acquires non-contact displacement signals from two eddy-current proximity probes, conditions and linearizes the data, and provides configurable alarm and trip logic for early fault detection. It supports local panel setup and remote configuration via host systems, with adjustable alarm/trip delays to suppress false triggering. Dual-channel design enables redundant probe placement, enhancing measurement reliability. Integrated self-diagnostics continuously monitor power, circuitry, probe gaps, and relay status, enabling fast fault localization. As a key 3300 TSI component, it connects to System 1 and plant-wide DCS/PLC/SCADA for data trending, storage, analysis, and predictive maintenance. This model includes one relay output for alarm or trip interlock.

Core Performance Parameters

Measurement & Input

Channels: 2 independent thrust position channels
Sensor Compatibility: Bently Nevada eddy-current proximity probes (7200, 3300, 3300 XL series)
Measurement Range: ±1.0 mm (±40 mils), configurable via probe and setup
Accuracy: ≤ ±0.03 mm (±1.1 mils) at room temperature
Resolution: 0.001 mm
Input Impedance: ≥ 10 kΩ
Response Time: < 100 ms for alarm/trip detection

Electrical

Power: –24 VDC (±10%)
Power Consumption: ≤ 5.5 W (typical)
Relay Outputs: 1 SPDT relay, rated 2 A @ 24 VDC
Isolation: Input-to-power ≥ 2500 VAC
Analog Output: None

Environmental

Operating Temperature: 0 °C to +65 °C
Storage Temperature: –40 °C to +85 °C
Humidity: 5%–95% (non-condensing)

General Compatible Accessories

Proximity Probes: Bently Nevada 3300 XL series (e.g., 330101, 330102), 7200 series
Probe Cables: High-frequency coaxial cables (e.g., Bently Nevada 330130 series)
Proximitors: Bently Nevada 3300/25 or 3300/30 series signal conditioners
Rack & Backplane: 3300 series 19-inch rack, backplane with –24 VDC power and communication bus
Power Supply: 3300/10 series redundant power supply module
Configuration Tools: Local front-panel keypad; System 1 software for remote parameterization

Applicable Equipment & Industries

Equipment

Steam turbines, gas turbines, and turbo-generators
Centrifugal compressors, axial compressors, and blowers
Multistage process pumps and high-speed motors
Turbo-expanders and critical rotating process machinery

Industries

Power Generation: Thermal power, nuclear power (turbine/generator thrust bearing protection)
Oil & Gas / Petrochemicals: Compressors, process pumps, and motors in harsh environments
Metallurgy: Large fans, rolling mill drives, and high-speed rotating equipment
Air Separation & Chemicals: Critical process machinery and turbo-compressors

Contact Info