Bently Nevada 3300 XL Modules: 3300/39-03-00

Technical Dossier

Product Details And Specifications

Bently Nevada 3300 XL Series Technical Notes

The Bently Nevada 3300 XL Series is one of the most widely deployed proximity transducer systems in global heavy industry. Installed across petrochemical refineries, nuclear power stations, offshore platforms, LNG terminals, and rotating machinery monitoring applications, the 3300 XL platform provides continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion. Its eddy-current sensing principle, combined with a three-component architecture (probe, extension cable, proximitor), delivers measurement accuracy and reliability demanded by API 670-compliant machinery protection systems. The series remains the reference standard for turbine, compressor, and pump shaft monitoring in facilities operated by ExxonMobil, Shell, SABIC, and comparable tier-1 industrial operators.

The Evolution of 3300 XL Architecture

The 3300 XL Series succeeded the earlier Bently Nevada 3300 standard-range platform, introducing an extended linear range (XL) that increased the usable gap voltage window from the legacy 200 mil range to 400 mil, enabling compatibility with larger shaft diameters and longer extension cable runs without recalibration. Early 3300 series proximitors (pre-XL) operated on a fixed -24 VDC supply and were limited to 5-meter extension cables. The XL revision introduced modular cable length options (0.5 m, 1.0 m, 5.0 m, 9.0 m) and extended the proximitor supply range to accommodate both -24 VDC and -18 VDC field installations.

3300 XL Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked components within the Bently Nevada 3300 XL proximity transducer system. Classifications follow functional role within the measurement chain.

Proximity Probes (Sensors)

• 3300/39-03-00: 14mm proximity probe, 3m armored extension, standard connector, -24 VDC, API 670 compliant
• 3300/40-03-00: 14mm proximity probe, 3m cable, reverse-mount configuration for limited-access installations
• 3300/41-03-00: 14mm proximity probe, 3m cable, high-temperature variant rated to 177°C continuous
• 3300/05-03-00: 8mm proximity probe, 3m extension cable, standard connector, general-purpose shaft monitoring
• 3300/16-03-00: 11mm proximity probe, 3m extension cable, mid-range gap sensitivity, balanced for compressor shafts
• 3300/50-03-00: 14mm proximity probe, 3m cable, ATEX/IECEx certified for Zone 1 hazardous area installations

Extension Cables

• 3300/03-01-00: 1.0m armored extension cable, 14mm probe compatible, standard temperature rating
• 3300/03-05-00: 5.0m armored extension cable, 14mm probe compatible, field-replaceable connector
• 3300/03-09-00: 9.0m armored extension cable, 14mm probe compatible, for remote proximitor mounting
• 3300/03-00-05: 0.5m armored extension cable, 8mm probe compatible, short-run installations

Proximitor Sensors (Signal Conditioners)

• 3300/55-01-01-00-00-00: 3300 XL 8mm proximitor, -24 VDC supply, 200 mil range, DIN rail mount
• 3300/55-02-01-00-00-00: 3300 XL 11mm proximitor, -24 VDC supply, 300 mil range, panel mount
• 3300/55-03-01-00-00-00: 3300 XL 14mm proximitor, -24 VDC supply, 400 mil range, standard housing
• 3300/55-03-02-00-00-00: 3300 XL 14mm proximitor, -18 VDC supply variant, for legacy panel compatibility
• 3300/55-03-01-02-00-00: 3300 XL 14mm proximitor, ATEX certified, Zone 1, -24 VDC, armored housing

Mounting & Accessories

• 3300/20-00-00: Proximitor mounting bracket, standard DIN rail adapter, stainless steel
• 3300/21-00-00: Probe mounting block, 14mm thread, carbon steel, field-adjustable gap lock
• 3300/22-00-00: Junction box assembly, 4-channel, IP65, for field cable termination

Sourcing Hard-to-Find & Obsolete 3300 XL Parts

DriveKNMS sources 3300 XL components through a combination of certified surplus inventory, factory-refurbished units, and cross-compatible substitution engineering. Each unit is individually serialized and traceable. For obsolete proximitor models and discontinued probe configurations, DriveKNMS provides documented functional equivalence assessments to support plant engineering approval workflows. Customers operating under ISA-18.2 or IEC 61511 functional safety frameworks can request full traceability documentation packages.

Quality Control for the 3300 XL Range

The 3300 XL measurement chain — probe, extension cable, proximitor — functions as a calibrated system. Component substitution without system-level verification introduces gap sensitivity errors and scale factor deviations that are not detectable by visual inspection alone. 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 disk across the full gap range (0–400 mil for 14mm variants) to verify output voltage linearity within ±1% of nominal scale factor.
• Scale factor verification: Output sensitivity (mV/mil) is measured and compared against the Bently Nevada factory specification for the specific probe/proximitor combination.
• Cable continuity and insulation resistance: Extension cables are tested for conductor continuity, shield integrity, and insulation resistance (>100 MΩ at 500 VDC) to detect field damage or moisture ingress.
• Supply current draw: Proximitor quiescent current is measured at nominal supply voltage to identify internal component degradation not visible in output signal tests.
• Connector inspection: All MIL-spec and field-wired connectors are inspected for pin corrosion, mechanical retention, and sealing integrity.