Bently Nevada 330104-07-14-10-02-00 Proximity Transducer – 3300 XL Series

Bently Nevada 330104-07-14-10-02-00 — 8mm Eddy-Current Proximity Transducer System for Critical Rotating Machinery Protection

The 330104-07-14-10-02-00 is a factory-configured, field-ready proximity transducer system within the Bently Nevada 3300 XL platform. It integrates an 8mm diameter probe, a 10 ft (3.05 m) armored extension cable, and a Proximitor® sensor into a single, calibrated assembly. The system is designed for continuous, non-contact displacement measurement on rotating shafts in turbomachinery, compressors, and pumps where API 670 compliance is a contractual requirement. This is not a general-purpose sensor — it is a precision measurement instrument whose output directly feeds machinery protection logic capable of initiating emergency shutdowns.

The 3300 XL platform was developed to address the measurement accuracy limitations of earlier eddy-current systems under thermally and mechanically demanding conditions. The 330104 series specifically targets applications where probe-to-target gap must be resolved to sub-micron levels across a DC-to-10 kHz bandwidth, capturing both quasi-static axial position drift and high-frequency sub-synchronous rotor instabilities within a single signal chain.

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Technical Parameters

Hardware Logical Analysis

The 330104-07-14-10-02-00 operates on the eddy-current induction principle. The Proximitor® sensor houses a Colpitts-type LC oscillator that drives a 1.0 MHz carrier signal through the coaxial cable to the probe tip coil. When a conductive ferromagnetic target enters the probe’s electromagnetic field, eddy currents are induced on the target surface. These currents extract energy from the oscillator circuit, reducing oscillation amplitude in proportion to the probe-to-target gap. The Proximitor® demodulates this amplitude-modulated signal through a precision envelope detector and outputs a calibrated DC voltage at 7.87 V/mm scale factor.

EMC Design Architecture: The coaxial cable between probe and Proximitor® is a triaxial construction — inner conductor carries the oscillator signal, the inner shield is driven at the same potential as the center conductor (guard drive), and the outer shield provides ground reference. This driven-guard topology eliminates capacitive leakage currents that would otherwise corrupt the gap measurement in high-humidity or contaminated cable environments. In installations near variable-frequency drives (VFDs) or high-current bus bars, this architecture maintains signal integrity without requiring additional shielding conduit.

Thermal Stability: The probe body is machined from 316L stainless steel with a PEEK-insulated coil former. The coil winding uses a temperature-compensated formulation that maintains the 7.87 V/mm scale factor within ±0.5% across the full –35°C to +177°C probe temperature range. This eliminates the need for temperature correction tables in the monitoring rack configuration, reducing commissioning complexity on hot-section turbine bearing housings.

Mechanical Robustness: The probe tip is rated for continuous immersion in lubricating oil and steam condensate. The extension cable armor is stainless steel braid over a fluoropolymer jacket, providing resistance to hydrocarbon solvents, steam, and mechanical abrasion in confined bearing housing routing paths. The Proximitor® enclosure is cast aluminum with a conformal-coated PCB, rated IP54 for outdoor or wash-down environments.

System Integration Benefits

• Direct rack compatibility: The 3300 XL output signal is electrically identical to the 3300 series standard, allowing direct connection to Bently Nevada 3500/40M, 3500/42M, and 3500/45 monitor cards without input card reconfiguration or scale factor adjustment.
• Deterministic DC response: The DC-coupled output captures quasi-static axial position changes as slow as 0.001 mm/s, enabling thrust bearing wear trending over multi-month intervals without aliasing artifacts.
• Sub-synchronous instability detection: The 10 kHz bandwidth resolves rotor instabilities at fractional running speed (0.3×–0.5× N), including oil whirl and oil whip in journal bearings, which are invisible to accelerometer-based systems at low shaft speeds.
• Plug-and-play replacement: The 330104-07-14-10-02-00 is a direct dimensional and electrical replacement for earlier 330104 variants in the same cable-length configuration, eliminating the need for probe bracket modification or rack recalibration during maintenance outages.
• Dual-use measurement: A single probe installation simultaneously provides radial vibration (AC component) and average shaft centerline position (DC component) data, reducing the number of penetrations required in the bearing housing and simplifying the wiring schedule.
• Alarm and trip integration: The –1 VDC to –21 VDC output range maps directly to the 3500 rack’s standard input window, supporting both danger-high and danger-low trip setpoints for axial position protection without external signal conditioning.
• Diagnostic transparency: The Proximitor® includes an internal OK relay output that de-energizes when the probe gap falls outside the linear range or the cable is open/shorted, providing a hardware-level channel health signal to the DCS without requiring software polling.
• Reduced commissioning time: Factory-calibrated and tested as a matched system (probe + cable + Proximitor®), the 330104-07-14-10-02-00 eliminates the field calibration step required when mixing components from different serial number batches, reducing loop check time per channel by approximately 40 minutes.

Quality Assurance & Global Logistics

Every 330104-07-14-10-02-00 unit offered through siemensplc.com is sourced from authorized Bently Nevada distribution channels or verified, traceable surplus inventory. Incoming units undergo a structured inspection protocol: visual examination of probe tip, coil, and connector; coaxial cable continuity and insulation resistance verification; and functional gap-voltage output measurement against the published 7.87 V/mm scale factor at three reference gaps (0.5 mm, 1.0 mm, 1.5 mm). Units that do not meet the ±1% tolerance at all three reference points are quarantined and not dispatched.

Documentation supplied with each shipment includes a Certificate of Conformance (CoC), the original Bently Nevada calibration data sheet, and the manufacturer’s installation drawing. Extended documentation — including material traceability records and third-party inspection reports — is available on request for projects subject to owner-engineer or insurance surveyor review.

Logistics are managed from our Xiamen, China warehouse. Xiamen Gaoqi International Airport (XMN) provides direct cargo connections to Singapore, Dubai, Frankfurt, Los Angeles, and Sydney, supporting transit times of 3–7 business days to most industrial hubs globally. DHL Express, FedEx International Priority, and UPS Worldwide Express are standard carrier options. For time-critical plant shutdowns, same-day dispatch is available for orders confirmed before 14:00 CST. All shipments are export-compliant with full commercial invoice, packing list, and HS code documentation for customs clearance.

Contact Information

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