Bently Nevada 330104-00-16-05-01-00 Proximity Transducer – 3300 XL Series

Bently Nevada 330104-00-16-05-01-00 — Eddy-Current Proximity Transducer in Rotating Machinery Protection Loops

The Bently Nevada 330104-00-16-05-01-00 is a 5-metre armored-cable eddy-current proximity transducer belonging to the 3300 XL Series machinery protection platform. Its operating principle relies on the interaction between a high-frequency electromagnetic field generated at the probe tip and the conductive target surface of a rotating shaft. As the gap between probe face and shaft changes, the eddy-current loading on the oscillator circuit shifts proportionally, producing a DC output voltage that is linear across the calibrated measurement range. This non-contact sensing mechanism eliminates mechanical wear entirely, making the device suitable for continuous, unattended operation in critical rotating equipment — steam turbines, centrifugal compressors, boiler feed pumps, and large induction motors — where unplanned downtime carries severe economic and safety consequences.

Within a control loop, the 330104-00-16-05-01-00 functions as the primary sensing element feeding radial vibration, axial position, or differential expansion data to a Bently Nevada 3500 Series monitor rack. The monitor rack performs real-time signal conditioning, alert/danger threshold comparison, and relay actuation — but the accuracy and repeatability of the entire protection chain depends on the transducer’s calibration stability. The 3300 XL probe is factory-calibrated against AISI 4140 steel targets and delivers a sensitivity of 7.87 V/mm (200 mV/mil), a figure that remains stable across the full operating temperature envelope without field recalibration under normal service conditions.

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Technical Parameters

Hardware Logical Analysis

The 330104-00-16-05-01-00 probe operates as the passive sensing element of a three-component system: probe, extension cable, and Proximitor® sensor. The Proximitor® houses the oscillator-demodulator circuit that drives the probe coil at approximately 1 MHz. This frequency is high enough to generate a stable eddy-current field in the target while remaining below the threshold where cable capacitance introduces significant phase error across the 5-metre integral cable run.

EMC Design: The armored cable construction (suffix -01) provides a continuous metallic shield from the probe body to the Proximitor® input connector. This shield is grounded at a single point — the Proximitor® end — to prevent ground-loop currents that would appear as low-frequency noise on the output signal. In environments with high-power variable-frequency drives or large transformer banks, this single-point grounding scheme typically reduces common-mode interference by 30–40 dB compared to unshielded cable runs of equivalent length.

Thermal Stability: The probe coil is wound on a ceramic bobbin with a low coefficient of thermal expansion. The coil inductance variation across the −35 °C to +121 °C operating range is held within ±0.5% of nominal, which translates to a sensitivity drift of less than ±0.05 V/mm — well within the ±0.5% full-scale accuracy budget required by API 670 for radial vibration channels.

Mechanical Robustness: The probe tip is machined from a non-magnetic stainless alloy and threaded for M10 × 1 installation. The integral cable exits through a strain-relief fitting rated for 50 N axial pull without degradation of the internal coil-to-cable solder joint. The armored outer jacket resists abrasion, hydrocarbon fluids, and steam condensate — conditions common in turbine bearing pedestals and compressor seal areas.

Calibration Traceability: Each unit is factory-calibrated on a precision gap-setting fixture traceable to NIST (or equivalent national metrology institute) standards. The calibration data is encoded in the part number suffix structure, allowing the 3500 Series monitor to apply the correct scale factor without manual entry — reducing commissioning errors in multi-channel rack configurations.

System Integration Benefits

• Direct rack compatibility: The 330104-00-16-05-01-00 is a certified component of the Bently Nevada 3500 Machinery Protection System. It connects to 3500/40M and 3500/42M Proximitor/Seismic Monitor cards without adapter hardware, preserving the system’s SIL-rated signal chain integrity.
• Deterministic latency: The eddy-current output is a continuous analog DC signal. There is no sampling delay or digital conversion latency in the transducer itself. The 3500 monitor samples this signal at rates up to 65,536 samples/second per channel, enabling detection of sub-synchronous vibration components as low as 0.5× running speed on machines operating at 3,000 RPM.
• Plug-compatible replacement: The 330104-00-16-05-01-00 is a form-fit-function replacement for earlier 3300 Series probes with identical cable length and connector suffix. No re-ranging of the monitor card is required, reducing maintenance window duration.
• Diagnostic transparency: The Proximitor® output includes a gap voltage that the 3500 monitor reads as a DC component. Operators can monitor static gap in real time via the monitor’s front-panel display or via Modbus/TCP to the DCS historian, providing early warning of shaft centerline migration or bearing wear before vibration amplitude thresholds are reached.
• Multi-parameter measurement from a single probe: One 330104-00-16-05-01-00 installation can simultaneously deliver radial vibration (AC component), shaft average centerline position (DC component), and 1× speed reference (keyphasor trigger) when positioned at the appropriate angular location — reducing the total number of penetrations required in a bearing housing.
• API 670 compliance simplifies insurance and regulatory audits: Machinery protection systems built with API 670-listed components satisfy the documentation requirements of most insurance underwriters and jurisdictional safety authorities without additional third-party certification of the sensing element.
• Low installation footprint: The M10 probe body and 5-metre cable assembly fit within the standard Bently Nevada probe holder (part 330105 series), which is pre-drilled in most OEM turbine and compressor bearing housings. No field machining is required for replacement installations.
• Long service life reduces lifecycle cost: Non-contact operation means zero mechanical wear on the sensing element. Field data from petrochemical installations consistently shows mean time between replacement (MTBR) exceeding 10 years under normal operating conditions, compared to 2–4 years for contact-type speed sensors in equivalent environments.

Quality Assurance & Global Logistics

Every Bently Nevada 330104-00-16-05-01-00 unit dispatched from our Xiamen, China facility is a genuine Baker Hughes / Bently Nevada manufactured component. Units are sourced through verified supply channels — authorized distributor surplus, OEM factory stock, and sealed-inventory lots — and are never refurbished, re-labeled, or modified. Before shipment, each unit undergoes a three-stage inspection: visual examination of the probe body, cable jacket, and connector; output linearity verification across the full 0.25–2.26 mm measurement range using a calibrated gap-setting fixture; and documentation audit confirming part number, serial number, and country of origin consistency.

Packaging follows OEM specifications: the probe is shipped in its original anti-static foam insert with the connector protected by a dust cap. The 12-month warranty covers manufacturing defects and calibration drift beyond the API 670 tolerance band under normal operating conditions.

From Xiamen, we dispatch via DHL Express, FedEx International Priority, and UPS Worldwide for time-critical orders, with typical transit times of 3–5 business days to Europe, North America, and the Middle East. Sea freight consolidation is available for bulk orders. All shipments include a commercial invoice, packing list, and certificate of origin. Export compliance documentation (ECCN classification, EAR99 confirmation where applicable) is prepared as standard for customers in regulated jurisdictions.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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