Bently Nevada 3300 Series Modules

Technical Dossier

Product Details And Specifications

Bently Nevada 3300 Series: Comprehensive Module Range and Technical Overview

The Bently Nevada 3300 Series is a field-proven machinery protection and condition monitoring system deployed across the global heavy process industry. It is the standard-of-record in continuous rotating machinery monitoring at petrochemical complexes, nuclear power stations, offshore platforms, LNG terminals, and crude oil refineries. The system measures shaft radial vibration, axial position (thrust), differential expansion, eccentricity, speed, and phase reference — parameters that are mandatory inputs for API 670-compliant machinery protection on steam turbines, gas turbines, centrifugal compressors, and large motor-driven pumps.

Installed base estimates place the 3300 Series in tens of thousands of train-monitoring applications worldwide. Its modular architecture — separating the proximity transducer, extension cable, and signal conditioning monitor into discrete, field-replaceable components — has made it the dominant platform for long-term spare parts procurement in facilities with 20–40 year asset lifecycles. The system interfaces natively with GE's System 1 condition monitoring software and is backward-compatible with legacy Bently Nevada 7200 Series transducers in many configurations.

The Evolution of 3300 Series Architecture

The 3300 Series was introduced by Bently Nevada Corporation in the early 1990s as a successor to the 7200 Series, addressing the need for higher channel density, improved EMI immunity, and digital communication capability. The original architecture centered on a 19-inch rack-mounted monitor chassis accepting plug-in monitor cards, with field-mounted proximity transducer assemblies connected via armored extension cables.

First Generation (1990s): The initial 3300 monitors used analog signal conditioning with 4–20 mA and relay outputs. Rack systems were configured with individual monitor cards per measurement channel. The 3300/16 and 3300/20 monitors established the standard gap voltage range of −10 VDC (nominal) and the standard sensitivity of 200 mV/mil (7.87 V/mm) for 8 mm probes.

Second Generation (2000s): Integration of MODBUS RTU and later PROFIBUS DP communication ports allowed the 3300 Series to feed data directly into DCS platforms (Honeywell TPS, Emerson DeltaV, ABB 800xA) without intermediate signal converters. The 3300/55 Keyphasor module and 3300/65 tachometer were introduced to support phase-referenced vibration analysis.

Third Generation / Current Production: The 3300 XL series monitors introduced expanded memory, faster sampling rates, and native System 1 Ethernet connectivity. However, the physical form factor and transducer interface specifications were maintained for backward compatibility. Many facilities continue to operate first- and second-generation monitors alongside XL variants within the same rack.

Obsolescence and Migration Path: GE (now Baker Hughes) has progressively moved new installations toward the 3500 Series platform, which offers higher channel density and IEC 61511 SIL 2 certification. The 3300 Series is in the mature/end-of-active-production phase. Replacement parts, including proximity probes, extension cables, and monitor cards, are no longer manufactured in volume by the OEM. Procurement of certified surplus and refurbished inventory from specialist distributors is the primary supply chain strategy for facilities maintaining 3300-based systems.

3300 Series Full Catalog & Functionalities (SKU List)

Proximity Probes (Transducers)

• 330103-00-12-10-11-05: 8 mm proximity probe, 12-inch armored cable, standard tip, 200 mV/mil sensitivity, API 670 compliant
• 330103-00-18-10-11-05: 8 mm proximity probe, 18-inch armored cable, standard tip, radial vibration measurement
• 330103-00-06-10-11-05: 8 mm proximity probe, 6-inch armored cable, short-reach installation, standard sensitivity
• 330104-00-12-10-11-05: 11 mm proximity probe, 12-inch cable, extended measurement range, high-temperature environments
• 330105-02-12-10-11-05: 5 mm proximity probe, 12-inch cable, compact geometry, high-speed spindle applications

Extension Cables

• 330130-045-00-00: 3300 Series extension cable, 45-inch (1143 mm), standard armored, field-splice compatible
• 330130-080-00-00: 3300 Series extension cable, 80-inch (2032 mm), armored, for remote-mounted driver installations
• 330130-100-00-00: 3300 Series extension cable, 100-inch (2540 mm), armored, long-run field routing
• 330180-X1-05: 3300 Series armored extension cable assembly, custom length, stainless conduit jacket

Signal Conditioning Monitors (Rack Cards)

• 3300/16: Dual-channel radial vibration monitor, 4–20 mA output, relay alarm, standard rack card
• 3300/20: Dual-channel thrust position monitor, configurable gap range, relay outputs, DIN rail or rack mount
• 3300/25: Dual-channel differential expansion monitor, high-resolution position measurement, relay and analog outputs
• 3300/46: Dual-channel eccentricity monitor, low-speed shaft bow measurement, relay outputs
• 3300/50: Dual-channel speed monitor, overspeed detection, relay and frequency outputs
• 3300/55: Keyphasor module, phase reference signal conditioning, single-channel, TTL output
• 3300/65: Tachometer/speed monitor, configurable pulse-per-revolution, 4–20 mA and relay outputs

Power Supplies & Rack Infrastructure

• 3300/10: Rack power supply module, 24 VDC input, dual-redundant configuration supported
• 3300/15: Rack interface module, MODBUS RTU communication, RS-485 port
• 3300/95: Rack termination module, field wiring interface, barrier strip connections

Sourcing Hard-to-Find & Obsolete 3300 Series Parts

With the 3300 Series in the mature phase of its product lifecycle and OEM volume production discontinued, the primary procurement challenge for maintenance engineers is sourcing certified, tested components with documented traceability. DriveKNMS maintains a dedicated inventory of 3300 Series proximity probes, extension cables, and monitor cards sourced from decommissioned plant assets, authorized surplus channels, and controlled refurbishment programs.

Key sourcing capabilities for the 3300 Series include:

• Proximity probe assemblies (330103, 330104, 330105 families) with calibration certificates traceable to NIST standards
• Extension cables in standard and custom lengths, with continuity and insulation resistance test records
• Monitor cards (3300/16, /20, /25, /46, /50, /55, /65) tested on live rack systems prior to shipment
• Complete rack assemblies for facilities requiring a drop-in replacement for an entire monitoring channel
• Emergency shipment capability for unplanned outage scenarios, with same-day dispatch on in-stock items

DriveKNMS provides a 12-month warranty on all refurbished 3300 Series components and maintains documentation packages (test reports, calibration records, photos) for each unit shipped. For facilities with long-term maintenance contracts, blanket purchase order arrangements are available to secure inventory allocation against planned turnaround schedules.

Quality Control for the 3300 Series Range

The 3300 Series proximity measurement chain — probe, extension cable, and driver/monitor — functions as a calibrated system. Substituting any single component without verifying system-level performance can introduce measurement error that is not detectable by individual component testing alone. DriveKNMS applies a system-level test protocol to all 3300 Series components:

• Proximity Probe Gap Calibration: Each probe is tested against a certified target material (AISI 4140 steel) across the full gap range (0–90 mil / 0–2.29 mm). Output linearity is verified against the OEM specification of ±0.5% full scale.
• Extension Cable Continuity and Insulation: Center conductor resistance, shield continuity, and conductor-to-shield insulation resistance (minimum 100 MΩ at 500 VDC) are measured and recorded for every cable assembly.
• Monitor Card Functional Test: Each monitor card is installed in a live 3300 rack with a calibrated probe simulator. Alarm setpoints, relay outputs, analog outputs (4–20 mA), and communication ports are verified against the OEM functional specification.
• System Chain Verification: Where probe and cable are shipped as a matched set, the complete chain (probe + cable + driver) is tested together to verify the composite sensitivity and gap voltage at the nominal operating point.
• Environmental Inspection: All components are inspected for connector corrosion, cable jacket integrity, and PCB contamination before acceptance into inventory.

© 2026 DriveKNMS. All trademarks belong to their respective owners. Specifications are for reference only and subject to change without notice. Verify all parameters against official documentation before installation.