Bently Nevada 3300 XL Modules: 330102-00-20-10-01-05 8mm Proximity Probe

Technical Dossier

Product Details And Specifications

Bently Nevada 3300 XL Series Technical Notes

The Bently Nevada 3300 XL Series is a machinery protection and condition monitoring platform deployed across the global heavy-process industries — including petrochemical refineries, nuclear power stations, offshore platforms, LNG terminals, and rotating-equipment-intensive chemical plants. The system monitors shaft vibration, axial position, speed, and phase reference on critical rotating machinery such as steam turbines, gas turbines, compressors, and pumps. Its modular architecture allows integration into both standalone rack configurations and distributed control system (DCS) environments via standard 4–20 mA and relay outputs. The 3300 XL platform is recognized under API 670 (Machinery Protection Systems) as a compliant monitoring solution, making it the de facto standard for turbomachinery protection in facilities governed by that specification.

The Evolution of 3300 XL Architecture

The Bently Nevada 3300 Series was introduced in the 1980s as a successor to the earlier 7200 and 3000 Series eddy-current systems. The 3300 XL designation marks the extended-life, enhanced-accuracy revision of the platform, introduced to address tighter API 670 Fourth Edition tolerances and improved EMI immunity requirements. Key architectural milestones include:

Early 3300 (pre-XL): Analog signal conditioning with discrete relay outputs. Limited to standard 5 mm and 8 mm probe configurations. No digital communication interface.

3300 XL Transition (mid-1990s): Introduction of the XL (Extended Linear) probe-driver-extension cable system, providing a calibrated, matched set with documented sensitivity of 7.87 V/mm (200 mV/mil). Backward compatibility with 3300-series racks was maintained for most I/O modules.

Modern Integration Era: The 3300 XL system interfaces with the System 1 condition monitoring software platform via dedicated interface modules. The series has entered a mature/end-of-active-production lifecycle; Baker Hughes (which acquired GE's Bently Nevada division) now positions the 3500 Series as the primary active platform. However, the 3300 XL remains in service at thousands of installed sites globally, and long-term maintenance support — including spare parts, recalibration, and obsolete module sourcing — remains a critical operational requirement for asset owners who cannot justify a full platform migration.

3300 XL Full Catalog & Functionalities (SKU List)

Proximity Probes — 8mm XL Series

330102-00-20-10-01-05: 8mm XL proximity probe, 5m (20 in.) armored cable, reverse-mount, standard temperature, 3300 XL system-matched, sensitivity 200 mV/mil.

330102-00-20-10-01-00: 8mm XL proximity probe, 5m cable, standard mount, non-armored, 200 mV/mil sensitivity, general-purpose installation.

330102-00-20-10-02-05: 8mm XL proximity probe, 5m cable, reverse-mount, high-temperature variant (up to 177°C), armored cable.

330102-00-20-10-02-00: 8mm XL proximity probe, 5m cable, standard mount, high-temperature, non-armored, for elevated ambient environments.

330102-00-30-10-01-05: 8mm XL proximity probe, 7.62m (30 in.) cable, reverse-mount, armored, standard temperature, 200 mV/mil.

330102-00-30-10-02-05: 8mm XL proximity probe, 7.62m cable, reverse-mount, high-temperature, armored, extended-reach installation.

Proximity Probes — 5mm XL Series

330101-00-20-10-01-05: 5mm XL proximity probe, 5m armored cable, reverse-mount, standard temperature, 200 mV/mil, for smaller shaft diameters.

330101-00-20-10-02-05: 5mm XL proximity probe, 5m armored cable, high-temperature, reverse-mount, 200 mV/mil.

Extension Cables

330130-080-00-00: 3300 XL extension cable, 8m, standard, connects probe to driver in matched-set configuration.

330130-050-00-00: 3300 XL extension cable, 5m, standard, for short-run probe-to-driver installations.

330130-100-00-00: 3300 XL extension cable, 10m, for extended-distance probe-to-driver routing.

Proximitor Drivers

330180-91-00: 3300 XL 8mm Proximitor sensor/driver, DIN-rail mount, -24 VDC supply, 200 mV/mil output, standard temperature range.

330180-51-00: 3300 XL 5mm Proximitor sensor/driver, DIN-rail mount, -24 VDC supply, 200 mV/mil output.

Monitoring Rack Modules

3300/16-02-01-01-00-00: 3300 Series dual-channel vibration monitor, 4–20 mA output, relay trip, rack-mount, API 670 compliant.

3300/20-02-01-00-00-00: 3300 Series dual-channel thrust position monitor, 4–20 mA, relay output, for axial position measurement on turbomachinery.

3300/25-02-01-00-00-00: 3300 Series speed/phase reference monitor, dual-channel, tachometer input, relay output, rack-mount.

Quality Control for the 3300 XL Range

The 3300 XL proximity probe system is a matched set: probe body, extension cable, and Proximitor driver are calibrated as a unit. Substituting unmatched components degrades system accuracy and may cause API 670 compliance failures. DriveKNMS applies the following QC protocol to all 3300 XL inventory:

Probe Sensitivity Verification: Each probe is tested on a calibrated target (AISI 4140 steel, per API 670 Annex D) at the standard gap range (0.25–2.54 mm). Output sensitivity must fall within ±1% of 200 mV/mil (7.87 V/mm).

Linearity Check: Output voltage is measured at 10 discrete gap positions across the linear range. Deviation from the reference curve must not exceed ±0.5% full scale.

Cable Continuity and Insulation Resistance: Extension cables are tested for conductor continuity and insulation resistance (minimum 100 MΩ at 500 VDC) to detect moisture ingress or mechanical damage common in field-returned units.

Proximitor Driver Functional Test: Driver output voltage, supply current draw, and temperature coefficient are verified against OEM datasheet limits. Units exhibiting drift outside ±2% of nominal are rejected.

Matched-Set Certification: Where a complete probe-cable-driver set is supplied, the assembled system is verified as a matched set with a combined sensitivity certificate traceable to the specific serial numbers shipped.