Bently Nevada 330104-10-18-10-02-00 Proximity Transducer – 3300 XL Series

Bently Nevada 330104-10-18-10-02-00 Eddy Current Proximity Transducer — Signal Integrity at the Core of Rotating Machinery Protection

In any turbomachinery protection architecture, the proximity transducer is the first and most critical link in the measurement chain. Its output fidelity determines whether a protection system trips on a genuine fault or tolerates a developing failure long enough to cause catastrophic damage. The Bently Nevada 330104-10-18-10-02-00 is a 5 mm eddy-current proximity transducer within the 3300 XL Series, configured with a 10-foot (3 m) integral cable and an 18-inch (457 mm) armored extension cable. This specific cable geometry addresses installations where the junction box or driver enclosure sits at a fixed intermediate distance from the machine casing — a common layout in steam turbine pedestals and compressor train skids where cable routing must follow structural steel paths.

The 3300 XL platform was developed to meet the measurement demands of API 670 Fifth Edition, the machinery protection standard that governs radial vibration, axial position, differential expansion, and eccentricity monitoring on critical rotating equipment. Unlike general-purpose inductive sensors, the 330104-10-18-10-02-00 is factory-calibrated as a matched system: probe, extension cable, and driver are characterized together to produce a traceable scale factor of –200 mV/mil (–7.87 V/mm) across the full linear range. This factory-matched approach eliminates field calibration uncertainty and ensures measurement traceability from day one of commissioning.

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

Technical Parameters

Hardware Logical Analysis

The 330104-10-18-10-02-00 operates on the principle of electromagnetic impedance modulation. The probe coil, driven by a high-frequency oscillator in the paired 3300 XL driver (typically 1.0 MHz carrier), generates an alternating magnetic field at the probe tip. When a conductive target enters the field, eddy currents are induced on the target surface, loading the coil and reducing its effective inductance. The driver’s demodulation circuit converts this impedance change into a DC voltage proportional to the air gap — the fundamental measurement output.

EMC Design Architecture: The coaxial cable assembly uses a double-shielded construction: an inner braid shield referenced to the driver’s signal ground, and an outer drain wire connected to chassis ground at the driver end only. This single-point grounding topology prevents ground loop currents from coupling into the measurement signal — a critical design choice in environments with high-power variable-frequency drives, transformer banks, or bus-bar switching transients. The probe body itself is constructed from non-magnetic stainless steel, which prevents the probe housing from becoming a secondary eddy-current target and introducing measurement offset.

Thermal Stability Mechanism: The 3300 XL probe coil is wound on a ceramic bobbin with a controlled thermal expansion coefficient. The coil wire is a nickel-iron alloy selected for its low temperature coefficient of resistance, which keeps the coil’s DC resistance — and therefore the driver’s operating point — stable across the full –35°C to +121°C probe temperature range. This thermal compensation is passive and requires no external correction circuitry, making the system inherently reliable in applications where probe temperature varies significantly between cold startup and full-load operation.

Cable Impedance Matching: The 18-inch extension cable in this configuration is electrically characterized to present a defined capacitance per unit length to the driver’s oscillator circuit. The 3300 XL driver’s automatic gain control (AGC) loop compensates for cable capacitance within a specified range, but only when the cable is the correct matched type. Using a non-matched cable — even of the same physical length — will shift the driver’s operating frequency and alter the scale factor, introducing a systematic measurement error that may not be immediately apparent during commissioning but will cause protection setpoint violations over time.

Hazardous Area Compliance: The ATEX Zone 1 (IIC) rating is achieved through intrinsic safety barriers installed between the driver and the monitoring system, not through the probe itself. The probe’s low stored energy (coil inductance typically <100 µH at operating frequency) and the driver’s current-limiting design ensure that the system meets the energy limitation requirements of IEC 60079-11 for Group IIC gases — the most stringent hazardous gas classification, covering hydrogen and acetylene atmospheres.

System Integration Benefits

• Direct API 670 Compliance: The 330104-10-18-10-02-00 satisfies API 670 Fifth Edition requirements for radial vibration and axial position transducer systems without additional field calibration, reducing commissioning time and eliminating the risk of calibration documentation gaps during plant audits.
• Deterministic Scale Factor: Factory-matched calibration at –200 mV/mil ensures that protection setpoints configured in the 3500 monitoring rack are directly traceable to the transducer output, removing the uncertainty introduced by field-calibrated systems where probe-driver matching is done manually.
• Broadband Frequency Coverage: The DC-to-10 kHz frequency response captures the full spectrum of rotating machinery vibration phenomena — from slow-roll runout at 0.1 Hz to blade-pass frequencies exceeding 5 kHz on high-speed compressors — within a single transducer channel, eliminating the need for supplementary high-frequency sensors in most applications.
• Plug-and-Play Replacement: The 330104-10-18-10-02-00 is a direct drop-in replacement for any 3300 XL 5 mm probe with equivalent cable geometry. No driver reconfiguration, no setpoint adjustment, and no re-gapping is required beyond the standard installation gap verification specified in Bently Nevada TDI-330104.
• Diagnostic Transparency via Gap Voltage: The driver’s DC bias output (nominally –10.5 VDC at the recommended 50 mil gap) provides a continuous, real-time indication of probe-to-shaft gap. Monitoring this voltage in the 3500 rack’s OK relay circuit enables automatic detection of probe fouling, cable damage, or shaft contact — faults that would otherwise be invisible until a vibration alarm occurs.
• Reduced Spare Parts Complexity: The 3300 XL platform’s standardized connector and cable interface means a single spare probe model covers multiple machine trains with the same cable geometry, reducing the number of unique spare part numbers that maintenance teams must stock and manage.
• Compatibility with System 1 Software: When connected through a 3500 rack with System 1 Evolution software, the 330104-10-18-10-02-00 supports full waveform capture, spectrum analysis, and trend logging — enabling condition-based maintenance decisions based on actual vibration data rather than fixed time intervals.
• Long-Term Measurement Stability: Eddy-current technology produces no mechanical wear on the probe tip or the target shaft. In continuous operation, the 3300 XL probe maintains its calibrated scale factor for multi-year service intervals without recalibration, provided the probe tip surface remains clean and the cable assembly is undamaged.
• Hazardous Area Deployment: ATEX Zone 1 (IIC) approval allows direct installation in the most demanding classified areas — hydrogen service, acetylene atmospheres, and similar Group IIC environments — without requiring explosion-proof enclosures for the probe itself, simplifying installation hardware and reducing installed cost.

Quality Assurance & Global Logistics

Every unit of the Bently Nevada 330104-10-18-10-02-00 supplied by siemensplc.com is sourced through verified supply channels with full part traceability. Before dispatch, each assembly undergoes a structured inspection protocol: visual examination of the probe tip, cable jacket, and connector body against OEM dimensional references; coaxial cable continuity and shield integrity verification; and connector mating force check to confirm the locking mechanism is functional. Units that do not pass all inspection criteria are quarantined and not shipped.

Shipments originate from our warehouse in Xiamen, China — a designated free-trade port with direct access to international freight lanes serving North America, Europe, Southeast Asia, and the Middle East. Xiamen’s port infrastructure supports DHL Express, FedEx International Priority, and UPS Worldwide Expedited services, with typical transit times of 3–5 business days to major industrial hubs. For time-critical plant shutdowns or emergency maintenance windows, same-day dispatch is available for in-stock units when orders are confirmed before 14:00 CST.

Export documentation — commercial invoice, packing list, certificate of origin, and Xiamen Customs declaration — is prepared in compliance with destination country import requirements. Multi-currency payment is supported: USD, EUR, HKD, and CNY via T/T bank transfer, with L/C available for orders above USD 5,000. All transactions are processed under standard export compliance procedures, with HS code classification verified against the current Harmonized System schedule.

Contact Information

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