Bently Nevada 330104-05-10-15-01-CN Proximity Transducer – 3300 XL Series

Bently Nevada 330104-05-10-15-01-CN: Non-Contact Shaft Displacement Sensing in Critical Rotating Machinery Protection Loops

The 330104-05-10-15-01-CN is a factory-matched eddy current proximity transducer within Bently Nevada’s 3300 XL Series — a measurement chain architecture engineered for continuous, unattended monitoring of radial shaft vibration, axial position, and differential expansion on turbomachinery operating at speeds from 600 RPM to beyond 60,000 RPM. The part number encodes the complete physical configuration: 5 mm probe tip diameter, 10 m armored extension cable, 15 m total cable assembly, standard output driver pairing (01), and CN regional certification for China and Asia-Pacific compliance documentation.

In a machinery protection control loop, the proximity transducer is the first element in the signal chain. Its output — a DC voltage proportional to the gap between probe tip and target shaft surface — feeds directly into the oscillator-demodulator driver, which conditions the signal before transmission to the monitoring rack. Any degradation in transducer linearity, sensitivity, or frequency response propagates uncorrected through every downstream element. The 330104-05-10-15-01-CN is calibrated at the factory as a matched set with its designated driver, eliminating the sensitivity tolerance stack-up that occurs when probes and drivers are paired in the field from unmatched inventory. This matched-set discipline is the foundation of the ±0.5% full-scale accuracy that the 3300 XL system achieves across its operating temperature range.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The operating principle of the 330104-05-10-15-01-CN is based on the Lenz’s Law response of a conductive target to a high-frequency magnetic field generated by the probe coil. The oscillator within the paired driver energizes the probe coil at a carrier frequency typically in the range of 500 kHz to 2 MHz. When a conductive target enters the field, eddy currents are induced on the target surface, loading the coil and reducing its Q-factor. The demodulator extracts this amplitude change and converts it to a DC voltage output linearly proportional to the probe-to-target gap.

EMC Design Architecture: The 3300 XL probe assembly addresses electromagnetic interference through three independent mechanisms. First, the coaxial cable geometry provides inherent common-mode rejection — any external field couples equally to the inner conductor and shield, producing zero differential signal at the driver input. Second, the stainless steel armor layer provides a Faraday shield against capacitively coupled interference from adjacent power cables, which are common in turbine hall environments where 6.6 kV and 11 kV motor feeders run in shared cable trays. Third, the driver’s differential input stage applies an additional 60 dB CMRR, ensuring that ground potential differences between the probe mounting location and the monitoring rack — which can reach several volts in large generating stations — do not corrupt the measurement signal.

Thermal Stability: The probe coil is wound on a ceramic former with a controlled thermal expansion coefficient matched to the stainless steel housing. This minimizes the change in coil geometry — and therefore scale factor — across the operating temperature range. The specified scale factor drift is less than ±0.5% over the full –35°C to +177°C probe temperature range, which is critical for axial position measurements where a 0.1 mm error in a steam turbine differential expansion reading can trigger a spurious trip or, worse, mask a genuine thermal growth anomaly.

Cable Capacitance Control: The extension cable is manufactured to a controlled capacitance specification (typically 95 pF/m ±5%). Capacitance variation in the cable directly affects the resonant frequency of the probe-cable-driver circuit, shifting the operating point on the sensitivity curve. The factory-matched calibration of the 330104-05-10-15-01-CN accounts for the actual measured capacitance of the specific cable assembly shipped with the probe, rather than using a nominal value. This is why Bently Nevada’s matched-set policy prohibits substituting extension cables of different lengths or manufacturers without recalibration.

Target Material Compensation: The standard calibration of the 330104-05-10-15-01-CN is performed against AISI 4140 steel, which is the most common shaft material in turbomachinery. When the target material differs — for example, Inconel 718 in high-temperature gas turbine applications or titanium in aerospace compressors — the eddy current penetration depth and resistivity change, shifting the scale factor by up to 15%. The CN suffix unit ships with a calibration certificate that documents the as-calibrated sensitivity, enabling the end user to apply a material correction factor in the monitoring system configuration if the target material deviates from the 4140 baseline.

System Integration Benefits

• Deterministic Signal Latency: The DC output of the proximity transducer introduces zero group delay across the measurement bandwidth (DC–10 kHz), unlike piezoelectric accelerometers that require charge amplifier integration. This means the monitoring rack receives a phase-accurate representation of shaft motion, enabling precise orbit plot reconstruction and accurate identification of 1X, 2X, and sub-synchronous vibration components without phase correction algorithms.
• Direct API 670 Compliance: The 330104-05-10-15-01-CN is designed to meet the transducer performance requirements of API Standard 670 (Machinery Protection Systems), the governing specification for turbomachinery protection in the oil and gas industry. Procurement engineers can reference this compliance directly in purchase orders without additional qualification testing.
• Plug-Compatible with 3500 Series Racks: The output signal is electrically compatible with all Bently Nevada 3500 Series monitor cards, including the 3500/40M Proximitor/Seismic Monitor and the 3500/42M Proximitor/Seismic Monitor. No signal conditioning adapters are required, and the monitor card automatically reads the transducer type from the system configuration database.
• System 1 Software Integration: When connected through a 3500 rack to the System 1 Evolution (S1E) condition monitoring platform, the 330104-05-10-15-01-CN provides the raw gap voltage that S1E uses to compute dynamic vibration (AC component), static position (DC component), and gap alarm status simultaneously — three independent diagnostic parameters from a single transducer channel.
• Redundant Measurement Architecture Support: The 5 mm probe diameter allows two probes to be mounted at 90° in a standard proximity probe bracket without mechanical interference, enabling the XY orbit measurement configuration required by API 670 for radial vibration monitoring on fluid-film bearing machines. The matched sensitivity of factory-calibrated probe pairs ensures that the orbit plot is geometrically accurate rather than distorted by sensitivity mismatch.
• Diagnostic Transparency via Gap Voltage Monitoring: The raw DC gap voltage is accessible at the driver output and at the 3500 rack front panel. Maintenance technicians can verify probe installation gap (typically 1.0–1.5 mm for a 5 mm probe) with a calibrated voltmeter without removing the probe from service, reducing planned maintenance duration and eliminating the risk of incorrect reinstallation.
• Hot-Swap Compatibility: The 3500 Series rack architecture supports channel-level hot-swap. A failed 330104-05-10-15-01-CN can be replaced and the replacement probe gapped and verified while the adjacent channels remain in service, maintaining protection coverage on the machine during the repair interval.
• Long Cable Run Capability: The 15 m total cable assembly of the 330104-05-10-15-01-CN accommodates installations where the monitoring rack is located in a remote equipment room separated from the machine by a significant cable run — a common requirement in offshore platform and large power station layouts where the control room is on a different deck or floor level from the turbine hall.

Quality Assurance & Global Logistics

Every 330104-05-10-15-01-CN unit dispatched from our Xiamen facility is a genuine Bently Nevada (Baker Hughes) component sourced through verified supply channels with full traceability documentation. The unit arrives with its original factory calibration certificate, which records the as-calibrated scale factor, linearity error, and temperature coefficient for the specific probe-cable assembly — not a generic datasheet value. This documentation is essential for API 670 compliance audits and insurance inspections at regulated facilities.

Pre-shipment inspection covers: visual examination of probe tip surface for mechanical damage, continuity and insulation resistance check of the cable assembly, connector pin integrity verification, and label/part number cross-check against the purchase order. Units that do not pass all inspection criteria are quarantined and not shipped.

Packaging uses anti-static foam inserts within a rigid outer carton, with desiccant sachets to control humidity during ocean freight. The probe tip is protected by a machined plastic cap. For air freight shipments, the assembly is double-boxed with shock-absorbing material rated to withstand 50G handling impacts.

From Xiamen, we dispatch via DHL Express, FedEx International Priority, and TNT for time-critical orders, with typical transit times of 3–5 business days to Southeast Asia, 5–7 days to the Middle East and Europe, and 5–8 days to North America. For project orders requiring consolidated shipment, we coordinate with licensed freight forwarders experienced in industrial automation component export, including preparation of commercial invoice, packing list, certificate of origin, and any destination-country import permits required for electrical measurement equipment. A 12-month warranty covers manufacturing defects and calibration drift beyond the published specification limits.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.