Bently Nevada 31000 Series Modules - 31000-16-10-15-063-03-02

Technical Dossier

Product Details And Specifications

Bently Nevada 31000 Series Technical Notes

The Bently Nevada 31000 Series Proximity Probe System is a foundational component of the 3300 Series machinery monitoring infrastructure, deployed across global heavy industry sectors including petrochemical refineries, nuclear power stations, offshore platforms, and rotating equipment facilities. Manufactured by Bently Nevada (a Baker Hughes company), the 31000 Series defines the physical interface layer between rotating machinery and the 3300 Series monitoring rack — converting mechanical shaft displacement into calibrated electrical signals (typically –24 VDC Proximitor output). Its installation base spans decades of continuous operation in critical asset protection systems where replacement-in-kind is the only viable maintenance strategy.

The Evolution of 31000 Series Architecture

The 31000 Series was introduced as part of Bently Nevada's standardized proximity transducer ecosystem, designed to interface directly with the 3300 XL 8mm and 11mm Proximitor Systems. Early configurations used fixed-length armored cable assemblies with integral connectors, targeting turbine shaft radial vibration and axial position measurement. As plant engineering standards evolved, the series expanded to include field-configurable housing lengths, extension cable variants, and temperature-rated assemblies for high-process-temperature environments (up to 177°C probe tip). The 31000 Series maintains backward compatibility with legacy 3300 Series monitor cards, making it the default replacement choice for installed bases that cannot migrate to the newer 330100 or 330180 series without full rack reconfiguration. In mature plant environments — where DCS architecture is frozen and capital expenditure for platform upgrades is deferred — the 31000 Series remains the only technically compliant spare part option.

31000 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked configurations within the Bently Nevada 31000 Series. Each model is classified by its functional role within the proximity measurement chain:

Proximity Probe Assemblies (Radial Vibration / Axial Position)

• 31000-16-10-15-063-03-02: 8mm probe, 5m armored cable, standard housing, –24V Proximitor compatible
• 31000-16-10-15-025-03-02: 8mm probe, 2m cable, short-reach radial vibration configuration
• 31000-16-10-15-100-03-02: 8mm probe, 10m extension, long-run turbine shaft monitoring
• 31000-16-10-15-050-03-02: 8mm probe, 5m cable, alternate connector termination
• 31000-25-10-15-063-03-02: 11mm probe body, 5m cable, high-sensitivity axial position measurement
• 31000-25-10-15-025-03-02: 11mm probe, 2m cable, compact installation axial sensing
• 31000-25-10-15-100-03-02: 11mm probe, 10m cable, extended-reach axial displacement
• 31000-16-05-15-063-03-02: 8mm probe, 5m cable, high-temperature rated tip (177°C)
• 31000-16-05-15-025-03-02: 8mm probe, 2m cable, high-temperature variant, short reach
• 31000-25-05-15-063-03-02: 11mm probe, 5m cable, high-temperature axial position

Extension Cable Assemblies

• 31000-16-10-15-063-02-00: 5m extension cable, 8mm system, field-splice compatible
• 31000-16-10-15-100-02-00: 10m extension cable, 8mm system, long-run installation
• 31000-25-10-15-063-02-00: 5m extension cable, 11mm system
• 31000-25-10-15-100-02-00: 10m extension cable, 11mm system, turbine pedestal routing

Housing / Connector Assemblies

• 31000-16-10-15-063-01-00: Probe housing only, 8mm, standard process connection, no cable
• 31000-25-10-15-063-01-00: Probe housing only, 11mm, standard process connection, no cable

Sourcing Hard-to-Find & Obsolete 31000 Series Parts

The Bently Nevada 31000 Series has entered the mature-to-declining phase of its product lifecycle. Baker Hughes / Bently Nevada has progressively shifted new project specifications toward the 330100 and 330180 Series, which offer integrated Proximitor electronics and digital output compatibility. However, the installed base of 31000 Series probes in operating refineries, power stations, and compressor trains remains substantial — and replacement-in-kind is mandated by most plant integrity management systems to avoid recalibration and re-certification costs.