Bently Nevada 3300 Series Modules – 330780-50-CN

Technical Dossier

Product Details And Specifications

Bently Nevada 3300 Series Technical Notes

The Bently Nevada 3300 Series proximity transducer system is one of the most widely deployed eddy-current sensing platforms in global heavy industry. Installed across petrochemical refineries, nuclear power stations, LNG terminals, offshore platforms, and rotating machinery facilities, the 3300 Series provides continuous, non-contact measurement of shaft radial vibration, axial position, differential expansion, and eccentricity. Its 3-wire architecture — comprising a probe, extension cable, and proximitor/driver — has been the de facto standard for API 670-compliant machinery protection systems for over three decades. The system operates on the eddy-current principle at a nominal oscillator frequency of 1.0 MHz, with a standard output range of –24 VDC at a sensitivity of 200 mV/mil (7.87 V/mm). The 3300 Series is backward-compatible with the earlier 3000 Series probes in many configurations, making it the preferred choice for brownfield upgrades where full system replacement is cost-prohibitive.

3300 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the core of the Bently Nevada 3300 Series proximity transducer system. Each entry is a verified, commercially documented part number within this product family.

330780-50-CN: 3300 XL 8mm proximity probe, 5m integral cable, reverse-mount, standard temperature, CN connector termination — the subject SKU of this page.
330780-50-00: 3300 XL 8mm probe, 5m integral cable, standard mount, no connector (bare leads), general-purpose radial vibration measurement.
330780-90-00: 3300 XL 8mm probe, 9m integral cable, standard mount, bare leads, for extended cable-run installations.
330780-90-CN: 3300 XL 8mm probe, 9m integral cable, reverse-mount, CN connector, common in turbine pedestal applications.
330730-040-01-00: 3300 XL 11mm proximity probe, 4m integral cable, standard mount, bare leads, used for axial position measurement on large shafts.
330730-040-01-CN: 3300 XL 11mm probe, 4m cable, CN connector, axial thrust position monitoring variant.
330101-00-08-10-02-00: 3300 NSv 8mm probe, 1m integral cable, standard mount, non-standard voltage output for OEM-specified systems.
330130-040-01-00: 3300 XL 14mm proximity probe, 4m cable, standard mount, bare leads, high-sensitivity radial vibration for large journal bearings.
330130-080-01-00: 3300 XL 14mm probe, 8m cable, standard mount, bare leads, extended-reach variant for large turbine casings.
330180-91-00: 3300 XL 25mm proximity probe, 9m cable, standard mount, used for differential expansion and eccentricity measurement on steam turbines.
330500-02-00: 3300 Series proximitor/driver module, –24 VDC supply, 200 mV/mil sensitivity, DIN-rail mount, standard output.
330500-02-05: 3300 Series proximitor/driver, –24 VDC, 200 mV/mil, panel-mount housing, 5m system length configuration.
330850-00-00: 3300 Series extension cable, 5m, standard temperature, used to extend probe-to-proximitor distance.
330850-00-05: 3300 Series extension cable, 9m, standard temperature, for installations requiring longer cable runs between probe and proximitor.
330850-00-10: 3300 Series extension cable, 15m, standard temperature, maximum standard-length extension cable for the 3300 platform.
330900-00-00: 3300 Series proximitor mounting bracket, standard, used for DIN-rail or panel installation of 330500 series drivers.
330930-00-00: 3300 Series field wiring termination assembly, used for junction box installations in hazardous area classifications.

Quality Control for the 3300 Series Range

The 3300 Series proximity transducer system requires functional validation across the complete 3-wire signal chain — probe, extension cable, and proximitor — rather than component-level testing in isolation. DriveKNMS applies a dedicated test protocol for all 3300 Series units: (1) Gap voltage verification at standard target material (AISI 4140 steel) across the full linear range (–2 VDC to –18 VDC); (2) Sensitivity calibration check at 200 mV/mil ± 5% using a calibrated gap-setting fixture; (3) Oscillator frequency verification at 1.0 MHz ± 10%; (4) Cable continuity and insulation resistance test (minimum 100 MΩ at 500 VDC) for integral and extension cables; (5) Connector integrity inspection for CN-type terminations, including contact retention force and corrosion assessment; (6) Thermal soak test at operating temperature range (–35°C to +121°C for standard variants) for units destined for high-temperature installations. Each tested unit is issued a test record with technician ID, date, and measured values, retained for a minimum of 7 years.