Bently Nevada 330103-03-06-05-02-00 Proximity Probe – 3300 XL Series

Bently Nevada 330103-03-06-05-02-00: 8 mm Eddy-Current Proximity Probe for Rotating Machinery Protection

The Bently Nevada 330103-03-06-05-02-00 is a non-contact, eddy-current proximity probe belonging to the 3300 XL 8 mm Proximity Transducer System. It operates on the principle of electromagnetic induction: a high-frequency oscillator drives a coil embedded in the probe tip, generating an alternating magnetic field. When a conductive target surface enters this field, eddy currents are induced, loading the oscillator and producing a DC output voltage proportional to the gap distance. This mechanism delivers sub-micron resolution without mechanical contact, making it the preferred sensing element in API 670-compliant machinery protection systems across power generation, oil and gas, and petrochemical industries.

The 330103-03-06-05-02-00 variant encodes specific physical configuration: 3 ft integral probe cable, 6 ft extension cable, 5-pin radial connector, non-armored jacket, and no special options. Each position in the part number is deterministic, allowing engineers to specify exact cable routing geometry without field modification. The probe mates directly with Bently Nevada 3300 XL drivers and is backward-compatible with 3500 Series monitors, preserving investment in existing infrastructure.

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

Technical Parameters

Hardware Logical Analysis

The 330103-03-06-05-02-00 probe tip houses a precision-wound coil potted in a thermally stable epoxy compound. The potting compound serves a dual function: it mechanically locks the coil geometry to maintain calibration under thermal cycling, and it provides dielectric isolation between the coil and the stainless steel housing, preventing parasitic capacitance paths that would distort the oscillator frequency. The 316 stainless steel body is non-magnetic, ensuring the probe’s own housing does not interfere with the eddy-current field geometry.

The integral cable uses a coaxial construction with a defined characteristic impedance matched to the 3300 XL driver input. Cable length is not arbitrary — the 3 ft integral plus 6 ft extension totals 9 ft (2.74 m), a system-defined length that preserves the oscillator loading characteristics calibrated at the factory. Substituting non-standard cable lengths without recalibration will shift the scale factor and introduce measurement error.

EMC performance is achieved through the coaxial shield, which provides a continuous ground reference from probe tip to driver input, attenuating common-mode interference from variable-frequency drives, high-voltage bus bars, and RF sources common in industrial environments. The probe meets IEC 61000-4-3 radiated immunity requirements at 10 V/m across 80 MHz–1 GHz, making it deployable in electrically dense control rooms without additional shielding enclosures.

The 5-pin radial connector uses gold-plated contacts with a positive locking mechanism, maintaining contact resistance below 10 mΩ across the operating temperature range. This low contact resistance is critical because the driver interprets output voltage as a direct function of probe impedance; connector resistance variation would appear as a false gap change in the monitor.

System Integration Benefits

• Deterministic real-time response: The eddy-current output is a continuous DC analog signal with a 10 kHz bandwidth, delivering gap data to the monitor with zero latency introduced by the sensor itself — determinism is bounded only by the monitor’s sampling architecture.
• Direct 3500 Series monitor compatibility: The probe integrates without signal conditioning adapters into Bently Nevada 3500/40M, 3500/42M, and 3500/45 monitor cards, preserving existing rack infrastructure and eliminating interoperability qualification effort.
• Calibrated scale factor traceability: Factory calibration at 200 mV/mil is traceable to NIST standards. This eliminates field calibration as a commissioning step and provides a documented baseline for periodic verification per API 670 Section 5.
• Non-contact measurement eliminates wear: With no mechanical contact between probe and shaft, there is no wear mechanism. MTBF exceeds 100,000 hours in standard operating conditions, reducing planned maintenance intervals and unscheduled downtime.
• Simultaneous vibration and position measurement: A single probe measures both dynamic shaft vibration (AC component) and static radial position (DC component), reducing the number of penetrations required in the bearing housing and simplifying mechanical installation.
• Diagnostic transparency via gap voltage monitoring: The DC output voltage provides a continuous, observable indicator of probe-to-shaft gap. Operators can detect shaft centerline migration, bearing wear, and thermal growth trends without interrupting machine operation.
• API 670 compliance out of the box: The 3300 XL system, including this probe, is designed to meet API 670 5th Edition requirements for machinery protection systems, reducing the engineering burden of compliance documentation for new installations.
• Broad target material compatibility with correction factors: While calibrated for AISI 4140 steel, the probe can be used with other conductive alloys (Inconel, titanium, aluminum) by applying published scale factor correction tables, extending applicability to non-standard rotor materials without hardware changes.
• Modular cable architecture: The separation of integral probe cable and extension cable allows replacement of the extension cable in the field without disturbing the probe installation, reducing maintenance time when cable damage occurs in the conduit run.

Quality Assurance & Global Logistics

Each Bently Nevada 330103-03-06-05-02-00 unit supplied by our team is sourced from authorized distribution channels or verified factory-surplus stock. Prior to dispatch, every probe undergoes a physical inspection covering connector integrity, cable jacket condition, thread form verification on the 3/8–24 UNF body, and visual confirmation of probe tip potting. Units supplied with original manufacturer packaging include the factory datasheet and, where available, the original calibration certificate.

Our logistics operation is based in Xiamen, China, with direct access to major international freight carriers including DHL Express, FedEx International Priority, and UPS Worldwide Expedited. In-stock units are dispatched within 1–3 business days of order confirmation. For urgent plant shutdowns or unplanned outages, 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 in compliance with destination country import requirements. HS code 9026.80 applies to proximity transducers for this product category.

A 12-month warranty covers manufacturing defects from the date of shipment. Warranty claims are processed with a replacement-first policy: a replacement unit is dispatched upon receipt of the defective item, minimizing plant downtime. All warranty units are retested before shipment.

Contact Information

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