Bently Nevada 330104 Series Modules

Technical Dossier

Product Details And Specifications

Bently Nevada 330104 Series: Comprehensive Module Range and Technical Overview

The Bently Nevada 330104 Series represents one of the most widely deployed proximity probe product lines in global heavy industry. Engineered for continuous, non-contact displacement and vibration measurement, these probes are installed across critical rotating machinery in petrochemical refineries, nuclear power stations, offshore platforms, LNG terminals, and large-scale chemical processing facilities. The 330104 Series operates within the 3300 XL proximity transducer system ecosystem — a platform that has maintained backward compatibility across multiple generations of Bently Nevada monitoring hardware, including the 3300, 3500, and System 1 condition monitoring architectures.

In rotating machinery protection applications, the 330104 probe is the primary sensing element for shaft radial vibration, axial position (thrust), differential expansion, and eccentricity measurements. Its 8 mm tip diameter and standardized cable configurations make it the default specification for OEM turbine and compressor packages from major manufacturers including GE, Siemens, MAN Energy Solutions, and Solar Turbines. Global installed base estimates place the 330104 Series in service at tens of thousands of machinery trains worldwide, making it one of the highest-volume industrial proximity probe SKUs in existence.

The Evolution of 330104 Series Architecture

The 330104 Series was introduced as part of Bently Nevada's 3300 XL transducer system, which itself succeeded the earlier 3300 Series (non-XL) platform. The architectural transition from 3300 to 3300 XL introduced enhanced EMI shielding, improved temperature stability across the -35°C to +177°C operating range, and tighter sensitivity tolerances (7.87 V/mm ± 0.5%). The 330104 probe is designed to operate exclusively with the 3300 XL extension cable (330130 Series) and the 3300 XL proximitor sensor (330180 Series), forming a calibrated three-component transducer system.

Early 330104 variants used a standard armor cable construction. Subsequent revisions introduced armored stainless steel conduit options (the -05 suffix) for high-vibration and high-temperature environments. The introduction of the -CON suffix variants provided factory-installed connectors, reducing field installation time and eliminating field-termination errors in hazardous area installations. As the 3500 monitoring system became the dominant platform from the mid-1990s onward, the 330104 Series maintained full compatibility, requiring no probe-level hardware changes — only recalibration of the proximitor gap voltage setpoints.

The 330104 Series is now classified by Bently Nevada (a Baker Hughes company) as a mature product line. While active production continues for select configurations, a significant portion of the catalog — particularly shorter cable lengths and non-armored variants — has transitioned to limited availability or end-of-life status. This lifecycle position makes third-party sourcing and certified refurbishment critical for operators maintaining legacy machinery protection systems.

330104 Full Catalog & Functionalities (SKU List)

The following SKUs represent the core configurations of the 330104 Series, organized by cable length, termination type, and construction variant. Each model is a calibrated component of the 3300 XL transducer system and is not interchangeable with non-XL 3300 Series probes without full system recalibration.

330104-00-06-10-01-00: 8mm probe, 0.5m integral cable, standard armor, bare-end termination, general-purpose radial vibration measurement.
330104-00-06-10-01-05: 8mm probe, 0.5m integral cable, stainless steel conduit armor, bare-end, high-vibration and high-temperature environments.
330104-00-12-10-01-00: 8mm probe, 1.0m integral cable, standard armor, bare-end, extended reach radial vibration applications.
330104-00-12-10-01-05: 8mm probe, 1.0m integral cable, stainless steel conduit armor, bare-end, armored variant for harsh process environments.
330104-00-18-10-01-00: 8mm probe, 1.5m integral cable, standard armor, bare-end, used in large-frame turbine bearing housings.
330104-00-18-10-01-05: 8mm probe, 1.5m integral cable, stainless steel conduit armor, bare-end, high-integrity installation variant.
330104-00-24-10-01-00: 8mm probe, 2.0m integral cable, standard armor, bare-end, long-reach configuration for compressor trains.
330104-00-24-10-01-05: 8mm probe, 2.0m integral cable, stainless steel conduit armor, bare-end, armored long-reach variant.
330104-00-30-10-01-00: 8mm probe, 2.5m integral cable, standard armor, bare-end, extended cable for remote bearing locations.
330104-00-36-10-01-00: 8mm probe, 3.0m integral cable, standard armor, bare-end, maximum standard cable length configuration.
330104-00-06-10-02-00: 8mm probe, 0.5m integral cable, standard armor, factory-installed connector (CON), simplified field installation.
330104-00-12-10-02-00: 8mm probe, 1.0m integral cable, standard armor, factory-installed connector, reduced field termination risk.
330104-00-18-10-02-00: 8mm probe, 1.5m integral cable, standard armor, factory-installed connector, turbine OEM package standard.
330104-00-24-10-02-00: 8mm probe, 2.0m integral cable, standard armor, factory-installed connector, compressor OEM package standard.
330104-00-06-10-01-CN: 8mm probe, 0.5m cable, ATEX/IECEx certified variant, Zone 1 hazardous area installations.
330104-00-12-10-01-CN: 8mm probe, 1.0m cable, ATEX/IECEx certified, Zone 1 hazardous area, petrochemical plant standard.
330104-00-18-10-01-CN: 8mm probe, 1.5m cable, ATEX/IECEx certified, Zone 1, offshore and refinery turbine applications.

Sourcing Hard-to-Find & Obsolete 330104 Series Parts

DriveKNMS maintains a dedicated inventory program for the Bently Nevada 330104 Series, with specific focus on configurations that have transitioned to limited OEM availability. The most frequently requested hard-to-find variants include short cable lengths (0.5m and 1.0m) in non-armored construction, ATEX-certified configurations for Zone 1 installations, and factory-connector (-02-00 suffix) variants for OEM turbine packages where field termination is not permitted by the original equipment specification.

For operators running 3300 or 3500 Series monitoring systems on critical machinery — particularly steam turbines, gas turbines, centrifugal compressors, and large electric motors — unplanned probe failure without a qualified spare creates an immediate machinery protection gap. DriveKNMS sources 330104 Series probes through a combination of certified new-old-stock (NOS) inventory, OEM-authorized surplus channels, and factory-recertified units. All units are traceable to original manufacturer documentation and are supplied with calibration data sheets confirming sensitivity (7.87 V/mm), linearity, and gap voltage performance within Bently Nevada factory specifications.

Lead times for standard configurations are typically 1–5 business days from confirmed stock. For rare configurations or large-quantity requirements, DriveKNMS provides a dedicated sourcing response within 24 hours of inquiry. Emergency same-day dispatch is available for critical plant shutdown situations.

Quality Control for the 330104 Series Range

The 330104 proximity probe is a precision-calibrated transducer, not a commodity sensor. Quality verification requires specialized test equipment and procedures that replicate the operating conditions of the 3300 XL transducer system. DriveKNMS applies the following test protocol to all 330104 Series units prior to dispatch:

Gap Voltage Linearity Test: Each probe is tested against a calibrated AISI 4140 steel target across the full linear range (0.25mm to 2.54mm gap) using a 3300 XL proximitor sensor. Output linearity must conform to the Bently Nevada factory specification of ±0.5% over the linear range.

Sensitivity Verification: Scale factor is measured and recorded. Acceptable range: 7.87 V/mm ± 0.127 V/mm (equivalent to 200 mV/mil ± 3.25 mV/mil). Units outside this range are rejected.

Cable Integrity Test: Full continuity and insulation resistance testing on the integral cable assembly. Insulation resistance must exceed 100 MΩ at 500 VDC. Shield continuity and center conductor resistance are verified against cable length specifications.

Tip Condition Inspection: Physical inspection of the probe tip for mechanical damage, corrosion, or contamination that would affect the electromagnetic field geometry. Units with tip damage are rejected regardless of electrical performance.

Connector Integrity (CON variants): Factory-installed connectors are inspected for pin alignment, contact plating condition, and environmental seal integrity. Connector variants are mated and unmated five times to verify retention force and contact reliability.

All test results are documented and supplied with each unit. DriveKNMS retains test records for a minimum of seven years to support customer audit and traceability requirements.