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Bently Nevada 3300/20-12-01-01-00-02 Dual Thrust Position Monitor

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Bently Nevada 3300/20-12-01-01-00-02 Dual Thrust Position Monitor
May 29, 2026

Bently Nevada 3300/20-12-01-01-00-02 Dual Thrust Position Monitor

The Bently Nevada 3300/20-12-01-01-00-02 is a high‑precision 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 shaft axial (thrust) position on critical rotating machinery. The module measures the rotor’s axial displacement relative to thrust bearings, providing early warning of thrust bearing wear, abnormal axial loads, or potential rotor‑stator contact. It features two independent proximity probe inputs, high‑accuracy signal conditioning, configurable alarm logic, two sealed relays, and comprehensive self‑diagnostics. 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.

Description

Bently Nevada 3300/20-12-01-01-00-02 Dual Thrust Position Monitor

Product Overview

The Bently Nevada 3300/20-12-01-01-00-02 is a high‑precision 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 shaft axial (thrust) position on critical rotating machinery. The module measures the rotor’s axial displacement relative to thrust bearings, providing early warning of thrust bearing wear, abnormal axial loads, or potential rotor‑stator contact. It features two independent proximity probe inputs, high‑accuracy signal conditioning, configurable alarm logic, two sealed relays, and comprehensive self‑diagnostics. 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: 3300/20-12-01-01-00-02

  • 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 independent alert and danger relays for alarm and trip logic. It supports local panel setup and remote configuration via host systems, with adjustable alarm delays to suppress false triggering. Dual‑channel design enables voting logic or redundant probe placement, minimizing false trips while ensuring protection. 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.

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

Electrical

  • Power: –24 VDC (±10%)

  • Power Consumption: ≤ 5.5 W (typical)

  • Relay Outputs: 2 × sealed SPDT relays; 2 A / 24 VDC contact rating

  • Isolation: Input‑to‑power ≥ 2500 VAC

  • Analog Output: None (configurable 4–20 mA / 0–10 VDC optional on other variants)

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


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