Bently Nevada 3300 XL Proximitor Sensors: 330180-X1-05 MOD145004-90

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 proximity transducer systems in global heavy industry. Installed across petrochemical complexes, nuclear power stations, offshore platforms, and refinery turbomachinery trains, the 3300 XL system provides continuous, non-contact measurement of shaft radial vibration, axial position, differential expansion, and eccentricity. Its eddy-current operating principle, combined with a three-component architecture (probe, extension cable, Proximitor sensor), delivers the measurement accuracy and long-term reliability demanded by API 670-compliant machinery protection systems. The 3300 XL platform superseded the earlier 3300 series and remains the reference standard for OEM turbine and compressor OEMs including GE, Siemens, MAN Energy Solutions, and Solar Turbines.

The Evolution of 3300 XL Architecture

The Bently Nevada proximity transducer product line originated in the 1960s with the 3000 series, establishing eddy-current sensing as the industry standard for rotating machinery monitoring. The 3300 series introduced in the 1980s standardized the three-component system and defined the 5mm and 8mm probe diameters that remain dominant today. The 3300 XL generation, introduced in the mid-1990s, extended the operating temperature range, improved EMI immunity, and introduced the extended-range (XL) gap voltage characteristic that allows a wider linear measurement range without recalibration.

Key architectural milestones: the transition from discrete component Proximitor circuitry to hybrid IC designs reduced sensitivity drift over temperature; the introduction of the 5/8mm (14.2mm) probe tip diameter as a compromise between the 5mm (high-sensitivity, short range) and 8mm (longer range, larger installation envelope) variants; and the standardization of the -24 VDC supply rail, which allowed direct integration with Bently Nevada 3500 and System 1 rack-based monitoring systems. Compatibility between 3300 XL probes and earlier 3300 Proximitor sensors is not guaranteed — gap voltage curves differ between generations, and mixed-generation systems require individual calibration verification per API 670 Annex D.

3300 XL Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked models within the Bently Nevada 3300 XL proximity transducer system. Each entry reflects a distinct probe diameter, cable length, temperature rating, or Proximitor configuration.

330180-X1-05 MOD145004-90: 5/8mm Proximitor sensor, standard temperature, -24 VDC, 5m system range — the subject SKU of this listing.
330180-91-05: 5/8mm Proximitor, standard configuration, 5m cable system, general-purpose industrial.
330180-91-00: 5/8mm Proximitor, 0m extension (direct-connect probe), compact installation.
330180-51-05: 5/8mm Proximitor, high-temperature variant, rated to 177°C probe tip.
330180-51-00: 5/8mm Proximitor, high-temperature, direct-connect configuration.
330104-02-05-10-02-00: 5mm probe, 2m armored cable, standard Proximitor, 10mm target gap range.
330104-02-08-10-02-00: 5mm probe, 8m armored cable, standard Proximitor.
330130-040-01-00: 8mm probe, 4m integral cable, standard temperature.
330130-080-01-00: 8mm probe, 8m integral cable, standard temperature.
330130-040-01-CN: 8mm probe, 4m cable, CE-marked, European market configuration.
330140-00-00: 3300 XL 8mm Proximitor sensor, standard, -24 VDC supply.
330140-00-05: 8mm Proximitor, 5m system, standard temperature rating.
330140-51-00: 8mm Proximitor, high-temperature configuration, direct-connect.
330101-00-00: 3300 XL 5mm Proximitor sensor, standard, short-range axial position measurement.
330101-00-05: 5mm Proximitor, 5m extension cable system, standard industrial.
330105-02-12-10-02-00: 5mm probe, 12m armored cable, extended-reach installation.
330175-02-05: 3300 XL Proximitor, reverse-mount configuration, panel-mount housing.

Quality Control for the 3300 XL Range

The 3300 XL Proximitor sensor is a precision analog instrument whose output linearity is directly dependent on the integrity of its internal oscillator-demodulator circuit and the matched characteristics of its paired probe and extension cable. DriveKNMS applies the following test protocol to all 3300 XL units prior to dispatch:

Gap Voltage Linearity Test: Each Proximitor is bench-tested against a calibrated target (AISI 4140 steel, per Bently Nevada specification) across the full linear range. Output voltage is recorded at 0.25mm increments and compared against the published gap voltage curve for the specific probe diameter. Units deviating more than ±0.5% from the nominal curve are rejected.
Supply Current Verification: Operating current draw at -24 VDC nominal supply is measured and compared against the datasheet specification. Elevated current draw indicates internal component degradation.
Output Noise Floor Measurement: Broadband noise on the DC output is measured with the probe stationary. Noise exceeding 5 mV RMS indicates oscillator instability and renders the unit unsuitable for API 670 applications.
Connector and Cable Integrity: All MIL-spec connectors are inspected for pin corrosion, thread damage, and dielectric integrity. Extension cable shield continuity and insulation resistance are verified at 500 VDC.
Thermal Cycling (High-Temperature Variants): 330180-51 and 330140-51 series units are subjected to a 4-hour thermal soak at rated maximum temperature prior to final gap voltage verification.