Bently Nevada 3300 XL Modules: 330101-00-12-10-02-00

Technical Dossier

Product Details And Specifications

Bently Nevada 3300 XL Series Technical Notes

The Bently Nevada 3300 XL series represents one of the most widely deployed vibration monitoring platforms in global heavy industry. Installed across petrochemical complexes, nuclear power stations, offshore platforms, and refinery turbomachinery trains, the 3300 XL system provides continuous, real-time machinery protection for rotating equipment including steam turbines, gas compressors, centrifugal pumps, and large electric motors. Its eddy-current proximity measurement architecture delivers non-contact displacement sensing with sub-micron resolution, making it the reference standard for API 670-compliant machinery protection systems. The platform's modular rack-based design allows field-replaceable transducer chains — probe, extension cable, and proximitor — to be maintained independently without process shutdown, a critical operational requirement in continuous-process industries.

The Evolution of 3300 XL Architecture

The 3300 XL series succeeded the earlier Bently Nevada 3300 standard series, introducing an extended-range eddy-current driver circuit that improved linearity across a wider gap range and reduced sensitivity to target material variations. The original 3300 series (non-XL) used a 5 mm nominal gap with a ±1 mm linear range; the 3300 XL expanded this to support 8 mm probes (330101 family) and 11 mm probes (330103 family), accommodating larger shaft diameters and heavier bearing clearances common in utility-scale turbomachinery.

The 3300 XL proximitor/extension cable system introduced a standardized connector interface (the Bently Nevada 3-pin MIL-spec connector) that remains backward-compatible with legacy 3300 installations, provided the correct driver card is matched to the probe tip diameter. The system operates on a –24 VDC supply rail, with output voltage ranging from –2 VDC (near gap) to –18 VDC (far gap), a convention maintained across all 3300 XL variants to ensure interchangeability within a rack system.

By the mid-2000s, Bently Nevada (acquired by GE in 2002, subsequently integrated into Baker Hughes in 2017) introduced the System 1 software platform as the digital overlay for 3300 XL hardware, enabling condition monitoring analytics without replacing field-installed transducer chains. This software-hardware separation extended the operational life of 3300 XL installations well into the 2020s. Many sites running 3300 XL hardware have migrated monitoring software to System 1 Evolution while retaining original probe and proximitor assemblies, making long-term spare parts availability a primary maintenance concern.

3300 XL Full Catalog & Functionalities (SKU List)

Proximity Probes — 8 mm Tip Diameter (330101 Family)

• 330101-00-12-10-02-00: 8 mm probe, 12-inch armored cable, standard temperature, reverse mount, no connector
• 330101-00-18-10-02-00: 8 mm probe, 18-inch armored cable, standard temperature, reverse mount
• 330101-00-24-10-02-00: 8 mm probe, 24-inch armored cable, standard temperature, reverse mount
• 330101-00-30-10-02-00: 8 mm probe, 30-inch armored cable, standard temperature, reverse mount
• 330101-00-36-10-02-00: 8 mm probe, 36-inch armored cable, standard temperature, reverse mount
• 330101-00-48-10-02-00: 8 mm probe, 48-inch armored cable, standard temperature, reverse mount

Proximity Probes — 11 mm Tip Diameter (330103 Family)

• 330103-00-12-10-02-00: 11 mm probe, 12-inch cable, high-sensitivity, large shaft applications
• 330103-00-18-10-02-00: 11 mm probe, 18-inch cable, high-sensitivity, large shaft applications
• 330103-00-30-10-02-00: 11 mm probe, 30-inch cable, high-sensitivity, large shaft applications

Extension Cables (330130 Family)

• 330130-080-00-00: 8 m extension cable, standard, mates with 330101 probes
• 330130-050-00-00: 5 m extension cable, standard, mates with 330101 probes
• 330130-100-00-00: 10 m extension cable, standard, mates with 330101 probes

Proximitor Sensors / Signal Conditioners (330180 / 330185 Family)

• 330180-91-00: 3300 XL 8 mm proximitor, –24 VDC, standard temperature, DIN rail mount
• 330185-91-00: 3300 XL 11 mm proximitor, –24 VDC, standard temperature, DIN rail mount

Rack-Mount Monitor Cards (3300 Series)

• 3300/16-13-01-01-00-00-00: Dual-channel radial vibration monitor, 4–20 mA output, relay trip
• 3300/20-13-01-01-00-00-00: Dual-channel axial position monitor, 4–20 mA output
• 3300/25-13-01-01-00-00-00: Dual-channel speed/phase reference monitor

Quality Control for the 3300 XL Range

The 3300 XL transducer chain — probe tip, armored integral cable, extension cable, and proximitor — must be tested as a matched system, not as individual components. DriveKNMS applies the following verification protocol to all 3300 XL units:

• Gap-voltage linearity sweep: Each probe/proximitor pair is tested across the full gap range (0.25 mm to 2.25 mm for 8 mm probes) using a calibrated AISI 4140 steel target. Output voltage linearity must be within ±0.5% of the nominal scale factor (200 mV/mil or 7.87 V/mm).
• Scale factor verification: Confirmed at nominal gap (1.0 mm for 8 mm probes) against factory specification.
• Cable continuity and insulation resistance: Armored cable and extension cable tested at 500 VDC; insulation resistance must exceed 100 MΩ.
• Connector integrity check: MIL-spec connector pins inspected for corrosion, deformation, and contact resistance (<50 mΩ).
• Proximitor supply current draw: Verified within ±10% of nominal at –24 VDC supply.
• Burn-in cycle: Refurbished proximitor units undergo 48-hour powered burn-in at ambient temperature before final test.