Bently Nevada 330104-00-20-10-02-CN Proximity Transducer – 3300 XL Series

Bently Nevada 330104-00-20-10-02-CN — Eddy-Current Proximity Transducer for Continuous Shaft Monitoring in Rotating Machinery

The Bently Nevada 330104-00-20-10-02-CN is an 8 mm eddy-current proximity transducer belonging to the 3300 XL Series, engineered for non-contact, continuous measurement of shaft radial vibration, axial position, and rotational speed in critical rotating machinery. Unlike piezoelectric accelerometers that measure surface acceleration, this transducer operates on the principle of electromagnetic induction: a high-frequency oscillating magnetic field generated at the probe tip induces eddy currents in the conductive target surface. The resulting impedance change in the probe coil is processed by a paired driver/conditioner into a DC voltage output proportional to the gap distance between probe tip and shaft surface.

The suffix breakdown of the part number defines the exact configuration: 330104 identifies the 8 mm probe body family; 00-20 specifies a 2.0 m integral cable; 10 denotes the standard armored cable jacket; 02 indicates the extension cable length class; and CN specifies the CN-type connector interface, which is the standard termination for Bently Nevada 3300-series driver inputs in Asian and European installations. This configuration is factory-calibrated and system-matched — no field recalibration is required when paired with a compatible 3300 XL driver.

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

Technical Parameters

Hardware Logical Analysis

The 330104-00-20-10-02-CN operates within a three-component measurement chain: probe, extension cable, and driver/conditioner. The probe coil is wound on a ferrite core and encapsulated in a hermetically sealed 316 SS housing. The driver generates a carrier frequency in the range of 1.0–1.5 MHz, which is transmitted down the coaxial cable to the probe tip. When the probe is positioned within its linear range (0.25–2.25 mm from the target), the eddy-current loading on the coil shifts the resonant frequency of the LC tank circuit inside the driver. This frequency deviation is demodulated and converted to a DC voltage output at −24 VDC supply, yielding the calibrated 7.87 V/mm sensitivity.

EMC Design: The armored cable jacket provides continuous shielding from the probe tip to the driver input, suppressing radiated interference from variable-frequency drives (VFDs), high-current bus bars, and RF sources common in turbomachinery environments. The shield is grounded at the driver end only (single-point grounding) to prevent ground loop currents that would introduce 50/60 Hz noise into the measurement signal. This architecture maintains signal integrity in environments with field strengths up to 30 V/m per IEC 61000-4-3.

Thermal Stability: The probe coil inductance is temperature-compensated through the driver’s internal calibration network. Over the full operating range of −35 °C to +121 °C, sensitivity drift is maintained within ±0.5% of nominal, which is critical for axial position measurements where a 0.1 mm error in thrust position can indicate impending bearing failure on a high-speed compressor.

Target Material Dependency: The eddy-current field penetration depth (skin depth δ) is a function of target conductivity and permeability. The factory calibration assumes AISI 4140 steel (σ ≈ 4.0 × 10⁶ S/m, μr ≈ 100). For non-standard targets such as 17-4 PH stainless steel or titanium alloys, the effective sensitivity deviates by 5–15%, requiring a target-specific calibration curve to be loaded into the monitoring system. This is a hardware-level constraint, not a software limitation.

System Integration Benefits

• Drop-in compatibility with 3300/3500 monitor ecosystem: The probe output is electrically identical across the 330104 family, allowing direct substitution into existing 3300/16, 3300/20, 3500/40M, and 3500/42M monitor slots without reconfiguring alarm setpoints or scale factors.
• Deterministic signal latency: The analog DC output from the driver/conditioner has a group delay of less than 1 ms, ensuring that vibration events captured at the probe are reflected in the monitor’s alarm logic within one scan cycle — critical for overspeed and high-vibration trip functions.
• 4–20 mA DCS integration: Monitor cards convert the probe voltage output to a 4–20 mA current loop, compatible with ABB 800xA, Honeywell Experion, Emerson DeltaV, and Yokogawa CENTUM VP analog input modules without signal conditioning hardware.
• PLC analog input compatibility: The conditioned output interfaces directly with Siemens S7-300/400/1500 SM331/SM334 analog input modules, Allen-Bradley ControlLogix 1756-IF16, and Mitsubishi MELSEC Q64AD — enabling vibration data to be processed within the PLC scan cycle for integrated machine protection logic.
• Diagnostic transparency via Keyphasor synchronization: When paired with a Keyphasor probe on the same shaft, the 330104-00-20-10-02-CN enables synchronous sampling, allowing the monitor to resolve 1× and 2× vibration components, phase angle, and orbit plots — providing actionable diagnostic data for imbalance, misalignment, and rub detection.
• Hazardous area deployment: ATEX and FM certifications allow installation in Zone 1/Zone 2 (ATEX) and Class I Division 1/2 (FM) classified areas, covering the majority of oil & gas upstream and downstream applications without additional barrier hardware in many configurations.
• Long cable runs without signal degradation: The coaxial cable architecture maintains signal integrity over the full 2.0 m integral cable plus extension cable combination, with the driver compensating for cable capacitance up to the rated total cable length — eliminating the need for signal repeaters in most field installations.
• Reduced commissioning time: Factory calibration to 7.87 V/mm with a traceable certificate of conformance eliminates the need for on-site sensitivity verification, reducing commissioning time by 30–60 minutes per measurement point compared to third-party probes requiring field calibration.

Quality Assurance & Global Logistics

Each 330104-00-20-10-02-CN unit supplied through siemensplc.com is sourced from verified channels with full lot traceability. Pre-shipment inspection covers visual examination of the probe body and cable jacket for mechanical damage, dimensional verification of the 8 mm thread and tip geometry, electrical continuity and insulation resistance testing of the coaxial cable, and connector interface verification for CN-type mating. A Certificate of Conformance (CoC) is available upon request for each shipment.

Shipments originate from our warehouse in Xiamen, China, a major international logistics hub with direct access to DHL Express, FedEx International Priority, and UPS Worldwide Express services. Standard lead time is 3–7 business days for in-stock units. Expedited same-day dispatch is available for orders confirmed before 14:00 CST. Export documentation — including commercial invoice, packing list, and certificate of origin — is prepared for all international shipments to facilitate customs clearance. Units are packed in ESD-safe foam-lined cartons to prevent mechanical and electrostatic damage during transit.

All products carry a 12-month warranty against manufacturing defects from the date of shipment. Warranty claims are processed with replacement dispatch within 5 business days upon receipt and inspection of the returned unit.

Contact Information

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