Bently Nevada 330425 Accelerometer Modules – 330425-01-05

Technical Dossier

Product Details And Specifications

Bently Nevada 330425 Series Technical Notes

The Bently Nevada 330425 series comprises industrial-grade accelerometer transducers engineered for continuous vibration monitoring in heavy rotating machinery. These sensors are deployed across global heavy industry installations including petrochemical refineries, nuclear power stations, offshore platforms, and large-scale compressor trains. The 330425 series integrates directly with Bently Nevada 3500 Series rack-based machinery protection systems, providing 4–20 mA or voltage output signals compatible with DCS and PLC infrastructure. Their rugged stainless-steel construction and hermetically sealed design make them a standard specification in API 670-compliant machinery protection programs worldwide.

The Evolution of 330425 Architecture

The 330425 series was developed as part of Bently Nevada's broader 330000-series transducer platform, which succeeded earlier eddy-current and velocity-based sensing technologies. Early iterations of the 330425 were designed for integration with the 7200 and 3300 series monitoring racks, using analog signal conditioning with fixed sensitivity outputs. As industrial monitoring evolved toward digital communication and fieldbus architectures, the 330425 series was refined to support compatibility with the 3500 rack system's dynamic pressure and acceleration input modules (3500/64 and 3500/65). Sensitivity options were standardized at 100 mV/g to align with API 670 fourth and fifth edition requirements. The series entered a mature lifecycle phase as Bently Nevada (a Baker Hughes company) shifted focus toward wireless and integrated condition monitoring platforms. However, the 330425 remains in active service across thousands of legacy installations, and long-term spare parts availability is a critical operational requirement for end users.

330425 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified 330425 series product range, classified by configuration and output specification:

Accelerometer Transducers — Standard Sensitivity (100 mV/g)

• 330425-01-05: 100 mV/g, top exit, 5-meter integral cable, stainless steel housing, M8 mount
• 330425-01-10: 100 mV/g, top exit, 10-meter integral cable, stainless steel housing, M8 mount
• 330425-01-15: 100 mV/g, top exit, 15-meter integral cable, stainless steel housing, M8 mount
• 330425-02-05: 100 mV/g, side exit, 5-meter integral cable, stainless steel housing, M8 mount
• 330425-02-10: 100 mV/g, side exit, 10-meter integral cable, stainless steel housing, M8 mount
• 330425-02-15: 100 mV/g, side exit, 15-meter integral cable, stainless steel housing, M8 mount

Accelerometer Transducers — High-Temperature Variant

• 330425-03-05: High-temp rated, top exit, 5-meter cable, extended operating range to 150°C
• 330425-03-10: High-temp rated, top exit, 10-meter cable, extended operating range to 150°C
• 330425-04-05: High-temp rated, side exit, 5-meter cable, extended operating range to 150°C
• 330425-04-10: High-temp rated, side exit, 10-meter cable, extended operating range to 150°C

Accelerometer Transducers — Armored Cable Variant

• 330425-05-05: Armored integral cable, top exit, 5-meter, for high-vibration or abrasive environments
• 330425-05-10: Armored integral cable, top exit, 10-meter, for high-vibration or abrasive environments
• 330425-06-05: Armored integral cable, side exit, 5-meter, for high-vibration or abrasive environments
• 330425-06-10: Armored integral cable, side exit, 10-meter, for high-vibration or abrasive environments

Accelerometer Transducers — Connector (Field-Wireable) Variant

• 330425-07-CN: Top exit, MIL-C-5015 connector termination, field-wireable, for custom cable length installations
• 330425-08-CN: Side exit, MIL-C-5015 connector termination, field-wireable, for custom cable length installations

Sourcing Hard-to-Find & Obsolete 330425 Parts

DriveKNMS maintains a dedicated inventory of 330425 series units sourced through verified industrial surplus channels, decommissioned plant asset recovery, and authorized secondary market suppliers. Our procurement team cross-references each unit against the original Bently Nevada part numbering matrix to confirm configuration accuracy before listing. For end users operating 3500-series racks in long-term service contracts, we provide multi-unit lot sourcing, kitting by rack slot configuration, and documented chain-of-custody records suitable for regulated industries including nuclear and refining.

Quality Control for the 330425 Range

Each 330425 unit processed by DriveKNMS undergoes a structured inspection and functional verification protocol prior to dispatch:

• Visual inspection of housing, cable jacket, connector pins, and mounting thread for mechanical integrity
• Sensitivity verification at 100 mV/g ± 10% using calibrated vibration reference standard
• Frequency response check across the rated bandwidth (typically 2 Hz to 10,000 Hz)
• Insulation resistance test between signal conductors and housing ground
• Cable continuity and shield integrity verification for full cable length
• Output signal noise floor measurement to confirm compliance with 3500 rack input specifications
• Documentation of test results retained per unit serial number for traceability