Bently Nevada 330106-05-30-10-02-CN Proximity Probe – 3300 XL Series

Bently Nevada 330106-05-30-10-02-CN — 8mm Eddy-Current Proximity Probe, 3300 XL Series, 5m Integral Cable

The 330106-05-30-10-02-CN is a factory-configured, non-contacting eddy-current proximity probe engineered for continuous shaft vibration and position measurement in critical rotating machinery. Operating within the Bently Nevada 3300 XL platform — the de facto standard for API 670-compliant machinery protection — this probe delivers a DC-coupled output signal proportional to the gap between probe tip and target surface, with a scale factor of 7.87 V/mm (200 mV/mil) and a linear measurement range of 0.25 mm to 2.25 mm. The CN suffix designates a variant configured for the Chinese domestic market, carrying GB/T compliance labeling and documentation aligned with petrochemical and power generation procurement requirements under Chinese national standards.

In a turbomachinery protection loop, the proximity probe occupies the first stage of the signal chain: it converts mechanical displacement into a proportional analog voltage with no moving parts, no contact wear, and no lubrication requirement. This architecture makes the 330106 series suitable for continuous 24/7 operation across the full machinery lifecycle — from commissioning through planned turnaround intervals measured in years. The probe body is machined from 316 stainless steel, providing resistance to H₂S, steam condensate, and hydrocarbon process fluids encountered in refinery and LNG environments.

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Technical Parameters

Hardware Logical Analysis

The 330106-05-30-10-02-CN operates on the principle of electromagnetic induction: a high-frequency oscillator within the matched proximitor (e.g., 330180) drives a resonant LC circuit whose inductance is formed by the probe coil. When a conductive target enters the probe’s electromagnetic field, eddy currents are induced on the target surface, loading the coil and reducing its effective inductance. The proximitor’s demodulation circuit converts this impedance shift into a DC voltage output that is linearly proportional to the gap distance across the calibrated range.

Matched-System Calibration Architecture: The probe, extension cable, and proximitor are factory-calibrated as a matched set. The extension cable’s characteristic impedance is controlled to ±1% to preserve the resonant frequency of the LC circuit. Substituting an unmatched cable introduces a systematic scale factor error that cannot be corrected by field adjustment — a critical procurement consideration when replacing individual system components.

EMC Design: The integral cable uses a double-shielded coaxial construction with drain wire grounded at the proximitor end only (single-point grounding), eliminating ground-loop interference in installations where the probe body is grounded through the machinery casing. The shield provides attenuation of radiated RF interference from variable-frequency drives, arc welding equipment, and high-voltage switchgear commonly co-located in industrial machinery halls.

Thermal Stability: The probe coil is wound on a ceramic bobbin with a low thermal coefficient of inductance. Across the operating temperature range of −35°C to +177°C, the scale factor drift is maintained within ±1% of nominal — a specification that supports accurate measurement in steam turbine bearing housings where probe body temperatures routinely exceed 120°C during normal operation.

IP67 Sealing: The probe tip and cable entry are sealed with fluoroelastomer (FKM) O-rings rated for continuous exposure to petroleum-based lubricants, glycol-based coolants, and steam condensate. The MIL-C-5015 connector provides a secondary environmental seal when mated with the extension cable connector.

System Integration Benefits

• Direct 3300 XL Monitor Compatibility: Plug-and-play integration with Bently Nevada 3300 XL proximitor/seismic monitors (330180, 330185) without field calibration — factory scale factor and bias voltage are pre-matched.
• 3500 Rack System Compatibility: Fully compatible with Bently Nevada 3500/42M and 3500/45 position monitor cards via the 3300 XL proximitor, enabling integration into existing 3500 series machinery protection racks without hardware modification.
• DCS Analog Input Integration: Output signal (−24 VDC bias + proportional gap voltage) interfaces directly with standard 4–20 mA transmitters and DCS analog input modules (Siemens S7, Emerson DeltaV, Honeywell Experion) for process historian integration and advanced diagnostics.
• SIS Compatibility: Signal conditioning modules (e.g., Bently Nevada 3500/32) convert the proximity probe output to a relay or 4–20 mA signal suitable for Safety Instrumented System (SIS) logic solvers, supporting SIL 2 machinery protection loops.
• API 670 Compliance: Meets the instrumentation and installation requirements of API Standard 670 (5th Edition), enabling acceptance by EPC contractors and end-users in refinery, LNG, and power generation projects without additional qualification testing.
• Deterministic Frequency Response: The DC–10 kHz bandwidth captures all vibration components relevant to rotating machinery diagnostics — 1× (unbalance), 2× (misalignment), sub-synchronous (fluid instability, rub), and high-frequency (gear mesh, blade pass) — within a single measurement channel.
• Diagnostic Transparency: The analog output voltage provides a direct, unprocessed gap signal accessible to both the protection monitor and an independent DCS channel simultaneously, enabling parallel protection and condition monitoring without signal splitting losses.
• Reduced Commissioning Time: Factory-matched system components eliminate the multi-point field calibration procedure required for non-matched eddy-current systems, reducing commissioning time per measurement point from approximately 2 hours to under 20 minutes.

Quality Assurance & Global Logistics

Every 330106-05-30-10-02-CN unit dispatched from our Xiamen, China facility undergoes a structured pre-shipment inspection protocol: physical integrity check of probe body, tip, and cable jacket; connector pin continuity and insulation resistance measurement; and verification of factory serial number against procurement documentation. Original OEM packaging is preserved where available, and factory serial numbers remain intact to support traceability requirements in regulated industries including nuclear auxiliary systems and offshore installations.

Units are sourced exclusively through verified industrial automation supply channels with documented chain of custody. Traceability documentation — including OEM calibration certificates for new-production units — is available upon request and provided at no additional charge for orders requiring regulatory compliance records.

Logistics from Xiamen, China: Standard B2B shipments are dispatched within 1–3 business days of order confirmation. Domestic China delivery (major industrial cities) typically completes within 3–5 business days via SF Express or equivalent tracked courier. International shipments to Southeast Asia, the Middle East, and Europe are routed via DHL Express or FedEx International Priority, with typical transit times of 3–7 business days depending on destination customs clearance. For plant shutdown emergencies requiring same-day dispatch, contact our technical team directly via WhatsApp for priority allocation from available stock.

All international shipments include commercial invoice, packing list, and certificate of origin. HS Code 9031.80 applies for customs classification in most jurisdictions. Import duty and VAT are the responsibility of the consignee unless otherwise agreed in writing.

Contact Information

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