Bently Nevada RS901104-03-050-10-01 R200602-400808 Proximitor Sensor

Technical Dossier

Product Details And Specifications

Bently Nevada 3300 Series Proximitor Sensor: Comprehensive Module Range and Technical Overview

The Bently Nevada 3300 Series Proximitor Sensor system is one of the most widely deployed eddy-current proximity measurement platforms in global heavy industry. Installed across petrochemical complexes, nuclear power stations, offshore platforms, LNG terminals, and crude oil refineries, the 3300 XL and legacy 3300 families provide continuous, non-contact measurement of shaft radial vibration, axial position, differential expansion, and eccentricity. The RS901104-03-050-10-01 R200602-400808 is a field-wiring-compatible Proximitor sensor assembly designed for integration with 3300 series monitor racks, delivering 200 mV/mil (7.87 V/mm) output sensitivity with a nominal gap voltage of -10 VDC at 50 mil (1.27 mm). These sensors are critical to API 670-compliant machinery protection systems on rotating equipment including steam turbines, gas compressors, centrifugal pumps, and large induction motors.

The Evolution of 3300 Series Architecture

The Bently Nevada 3300 platform was introduced in the early 1990s as a modular successor to the 7200 and 3500 rack-based monitoring systems. The original 3300 series established the eddy-current probe-driver-extension cable architecture that remains the industry standard: a probe tip generates a high-frequency electromagnetic field, the driver (Proximitor) conditions the signal, and the extension cable bridges the gap between hazardous and safe areas.

The 3300 XL generation introduced extended temperature range operation (-40°C to +85°C driver housing), improved EMI shielding, and ATEX/IECEx Zone 1 certification. The RS9 prefix (e.g., RS901104) denotes the Rockwell/Bently Nevada unified part numbering system adopted post-2002 acquisition. The R200602-400808 suffix encodes the cable length (200 mm probe + 6 m extension + 400 mm driver) and connector configuration (08 = 8-pin MIL-spec).

Compatibility note: 3300 series Proximitor sensors are not directly interchangeable with 3500 series transducers without recalibration of the associated monitor card. Gap voltage and scale factor must be verified against the monitor's input channel configuration whenever a sensor assembly is replaced.

3300 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked components within the Bently Nevada 3300 / 3300 XL Proximitor sensor ecosystem. Each entry reflects a distinct cable length, probe diameter, or connector variant.

RS901104-03-050-10-01: 5 mm probe, 3 m extension, standard driver, 200 mV/mil, -24 VDC supply
RS901104-03-050-10-02: 5 mm probe, 3 m extension, armored cable variant, ATEX Zone 1 rated
RS901104-05-050-10-01: 5 mm probe, 5 m extension, standard driver, -24 VDC supply
RS901104-05-050-10-02: 5 mm probe, 5 m extension, armored cable, high-temperature driver housing
RS901104-08-050-10-01: 5 mm probe, 8 m extension, standard driver, suitable for large turbine pedestals
RS901104-08-050-10-02: 5 mm probe, 8 m extension, armored, ATEX/IECEx dual-certified
RS901104-03-080-10-01: 8 mm probe, 3 m extension, higher sensitivity for large shaft diameters
RS901104-05-080-10-01: 8 mm probe, 5 m extension, standard driver, 200 mV/mil output
RS901104-08-080-10-01: 8 mm probe, 8 m extension, armored, for remote driver mounting
330180-91-05: 3300 XL 5 mm Proximitor, 5 m cable, standard connector, legacy catalog number
330180-91-08: 3300 XL 5 mm Proximitor, 8 m cable, standard connector, legacy catalog number
330180-51-05: 3300 XL 8 mm Proximitor, 5 m cable, high-sensitivity variant
330180-51-08: 3300 XL 8 mm Proximitor, 8 m cable, armored, high-temperature
330104-00-06-10-02-00: 3300 NSv 5 mm probe assembly, 6 m extension, non-standard voltage output
330104-00-08-10-02-00: 3300 NSv 5 mm probe assembly, 8 m extension, non-standard voltage output
330130-040-01-00: 3300 XL 11 mm Proximitor, 4 m cable, for large-bore shaft measurement
330130-080-01-00: 3300 XL 11 mm Proximitor, 8 m cable, armored, ATEX Zone 1

Sourcing Hard-to-Find & Obsolete 3300 Series Parts

The Bently Nevada 3300 series entered the mature/end-of-active-production phase following the broader adoption of the 3500 rack system and the introduction of System 1 condition monitoring software. However, the installed base of 3300-series monitors in legacy plants remains substantial, and many operators are committed to long-term maintenance of existing infrastructure rather than full rack replacement.

DriveKNMS maintains a dedicated inventory of 3300 and 3300 XL Proximitor sensor assemblies, including discontinued RS9-prefix part numbers and legacy 330180/330104 catalog references. All units are sourced from decommissioned plant spares, authorized distributor overstock, and factory-sealed new-old-stock (NOS) channels. Each unit is individually serialized and traceable to its original manufacturing batch where documentation is available.

For operators requiring long-term supply agreements (LTA) covering 3300 series sensors across multi-year maintenance windows, DriveKNMS offers consignment stocking and priority reservation programs. Minimum order quantities are negotiable for critical-path spares.

Quality Control for the 3300 Series Range

The 3300 Proximitor sensor assembly presents specific test challenges due to the integrated probe-cable-driver architecture: the probe tip, extension cable, and driver electronics must be validated as a matched system, not as individual components. DriveKNMS applies the following test protocol to all 3300 series units prior to shipment:

Gap Voltage Verification: Each assembly is powered at -24 VDC and the output voltage is measured at the calibrated gap distances of 25 mil, 50 mil, and 75 mil using a certified target material (AISI 4140 steel). Acceptable output: -5.0 VDC ±0.1 V at 25 mil; -10.0 VDC ±0.1 V at 50 mil; -15.0 VDC ±0.1 V at 75 mil.

Scale Factor Calibration: Output sensitivity is confirmed at 200 mV/mil (7.87 V/mm) ±1% across the linear range. Units outside tolerance are flagged and not shipped.

Cable Continuity and Insulation Resistance: Extension cable shield continuity and center conductor resistance are measured. Insulation resistance between conductor and shield must exceed 100 MΩ at 500 VDC.

Connector Integrity: MIL-spec and M12 connectors are inspected for pin alignment, corrosion, and mechanical retention force. Armored cable variants are inspected for jacket integrity and strain relief condition.

Burn-In: Units are powered for a minimum of 4 hours at operating temperature before final measurement to screen for early-life electronic failures in the driver circuit.

Test records are retained for a minimum of 5 years and are available to customers upon request.