Bently Nevada 330103-04-13-10-02-00 Proximity Probe – 3300 XL Series

Bently Nevada 330103-04-13-10-02-00 — 8 mm Eddy-Current Proximity Probe for Critical Rotating Machinery

The Bently Nevada 330103-04-13-10-02-00 is an 8 mm diameter eddy-current proximity transducer belonging to the 3300 XL Series. It operates on the principle of electromagnetic induction: a high-frequency oscillating current (typically 1.0–1.5 MHz) is driven through a coil embedded in the probe tip, generating an alternating magnetic field. When a conductive target surface enters this field, eddy currents are induced in the target, loading the oscillator circuit and producing a proportional DC output voltage. This non-contact measurement principle eliminates mechanical wear, making the sensor suitable for continuous, uninterrupted operation in turbomachinery protection systems where shaft vibration, radial position, and axial thrust must be monitored without interruption across multi-year maintenance intervals.

Within a machinery protection loop, the 330103-04-13-10-02-00 occupies the first stage of the signal chain. Its output — a DC voltage linearly proportional to gap distance — feeds directly into a matched Bently Nevada driver/oscillator (such as the 3300/16 or 3300/20), which conditions the signal before transmission to a 3500 Series monitor rack or equivalent. The probe’s 1.0 m integral cable and 3.0 m extension cable are factory-calibrated as a matched set, ensuring the system sensitivity of 7.87 V/mm (200 mV/mil) is maintained without field adjustment. Any substitution of unmatched cable lengths invalidates the factory calibration and introduces systematic measurement error across the full linear range.

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Technical Parameters

Hardware Logical Analysis

Eddy-Current Oscillator Architecture: The 330103-04-13-10-02-00 probe tip houses a precision-wound, multi-layer coil encapsulated in a ceramic-filled epoxy matrix. The coil forms the inductive element of a Colpitts-type LC oscillator circuit residing in the matched driver module. Operating frequency is held between 1.0 and 1.5 MHz, a range selected to balance penetration depth into the target material against sensitivity to surface conductivity variations. At this frequency, the skin depth in AISI 4140 steel is approximately 0.08 mm, confining eddy-current induction to the immediate surface layer and making the measurement insensitive to subsurface metallurgical variations.

EMC Design and Shielding: The integral coaxial cable uses a double-braid shield with greater than 95% optical coverage, terminated at both ends with low-impedance ground connections. This construction attenuates common-mode interference from adjacent high-voltage cables, variable-frequency drives, and bus bars — all typical in turbomachinery environments — to levels below the noise floor of the 3500 monitor’s A/D converter. The probe body itself is machined from 316 stainless steel, providing both corrosion resistance and a continuous Faraday enclosure around the coil assembly.

Thermal Stability: Sensitivity drift across the operating temperature range (–35 °C to +177 °C) is specified at less than ±0.5% per 55 °C change. This is achieved through the use of a temperature-compensated oscillator design in the driver and through the selection of coil winding materials with matched thermal expansion coefficients. In steam turbine applications where bearing housing temperatures routinely reach 120–150 °C, this drift budget translates to a worst-case measurement error of less than ±1.5% of full-scale — well within API 670 alarm setpoint tolerances.

Matched-Set Calibration Logic: Each 330103-04-13-10-02-00 probe is serialized and calibrated as a three-component set: probe, extension cable, and driver. The calibration data is encoded in the part number suffix structure. Positions 5–6 of the part number (–13–) designate the 1.0 m integral cable; positions 7–8 (–10–) designate the 3.0 m extension cable. Substituting a cable of different length alters the total distributed capacitance of the coaxial transmission line, shifting the oscillator operating point and producing a sensitivity error that cannot be corrected by software scaling alone without full field recalibration against a certified gap standard.

System Integration Benefits

• Direct plug-and-play compatibility with 3500 Series monitors: The 330103-04-13-10-02-00 interfaces natively with 3500/42M and 3500/40M proximity monitor cards without adapter hardware, preserving the factory-calibrated signal chain from probe tip to monitor display.
• API 670 compliance out of the box: The probe meets all dimensional, sensitivity, and frequency response requirements of API Standard 670 (5th Edition), eliminating the need for additional engineering review when specifying for new installations or replacements in regulated facilities.
• Deterministic DC output for real-time control loops: The DC-coupled output (DC – 10,000 Hz) allows the monitor to resolve both static position (DC component) and dynamic vibration (AC component) from a single sensor, reducing wiring complexity and eliminating the need for separate position transducers in most turbomachinery configurations.
• Hazardous area deployment without additional barriers: ATEX/IECEx-certified variants of the 330103 series are intrinsically safe (IS) at the probe level, allowing installation in Zone 0 and Zone 1 classified areas without external Zener barriers when paired with a certified IS driver.
• Wide target material accommodation: While factory-calibrated for AISI 4140 steel, the 3300 XL driver supports field recalibration for stainless steel (304/316), titanium alloy, and aluminum targets using Bently Nevada’s published correction factor tables, extending applicability to compressor impellers and non-ferrous shaft materials.
• System 1 software integration: The probe’s output is fully compatible with Bently Nevada System 1 condition monitoring software, enabling automated trend analysis, alarm management, and predictive maintenance scheduling without signal conversion or scaling adjustments.
• Diagnostic transparency via gap voltage monitoring: The raw DC gap voltage output (nominally –10 VDC at mid-range) is accessible at the driver terminal strip, allowing maintenance personnel to verify probe-to-shaft gap without removing the probe from service — a critical capability during scheduled outage inspections.
• Long-term spare parts availability: The 3300 XL platform has been in continuous production since the 1990s, and Bently Nevada maintains backward compatibility across driver and monitor generations. A 330103-04-13-10-02-00 installed today will remain compatible with future monitor upgrades without probe replacement.

Quality Assurance & Global Logistics

Every 330103-04-13-10-02-00 unit supplied through siemensplc.com is sourced from verified channels with full OEM traceability. Each probe is inspected prior to dispatch: physical integrity of the probe body and connector, coaxial cable continuity and shield resistance, and original Bently Nevada serialization markings are verified against the accompanying certificate of conformance. Units are shipped in original or equivalent anti-static packaging with desiccant to prevent moisture ingress during transit.

Logistics operations are based in Xiamen, China, with direct access to international freight forwarding via Xiamen Gaoqi International Airport and Xiamen Port. Standard export documentation — commercial invoice, packing list, certificate of origin, and MSDS where applicable — is prepared for each shipment. Delivery timelines: DHL/FedEx express to most destinations in 3–5 business days; sea freight consolidation available for bulk orders. All shipments are fully insured and tracked from dispatch to delivery confirmation.

A 12-month warranty covers manufacturing defects and calibration integrity from the date of shipment. Warranty claims are processed with replacement unit dispatch within 5 business days of confirmed defect verification. For critical plant applications requiring on-site spare holding, consignment stock arrangements are available — contact our technical team to discuss terms.

Contact Information

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