Bently Nevada 330130-00-03-10-02-CN Proximity Probe – 3300 XL Series

330130-00-03-10-02-CN: 8mm Eddy-Current Proximity Probe in the 3300 XL Transducer System

The Bently Nevada 330130-00-03-10-02-CN is an 8mm eddy-current proximity probe forming the field-sensing element of the 3300 XL Proximity Transducer System. Within a machinery protection loop, this probe functions as the primary displacement transducer: it generates a continuous, non-contact DC voltage output proportional to the gap between its tip and the conductive target surface. The output feeds directly into a matched Proximitor sensor (e.g., 330180 series), which conditions the signal before transmission to a 3500 Series rack or equivalent monitoring system. Because the measurement chain is entirely non-contact, there is no mechanical coupling between the probe and the rotating shaft — eliminating wear-induced drift and enabling indefinite service life under normal operating conditions. The CN suffix designates a Chinese-standard connector body, ensuring direct mechanical compatibility with locally manufactured junction boxes and field-wiring assemblies without adapter hardware.

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Technical Parameters

Hardware Logical Analysis

The 330130-00-03-10-02-CN operates on the eddy-current induction principle. The probe tip houses a wound coil driven by a high-frequency oscillator (typically 1.0 MHz) embedded in the matched Proximitor. The oscillating magnetic field induces eddy currents in the conductive target surface; these currents load the oscillator circuit, producing an amplitude change that is demodulated into a DC voltage proportional to gap distance. The relationship between gap and output voltage is linear within the specified 0.25–2.54 mm window, with a nominal scale factor of 7.87 V/mm.

The 3 m integrated cable is a precision coaxial assembly with controlled characteristic impedance. Any substitution with non-matched cable alters the total system capacitance and shifts the calibration curve — which is why the 330130 series specifies matched extension cables as a system component, not an accessory. The armored outer jacket provides mechanical protection against abrasion in turbine enclosures while maintaining the shielding continuity required for low-noise signal transmission in high-EMI environments.

From an EMC standpoint, the coaxial cable architecture provides inherent common-mode rejection. The shield is grounded at the Proximitor end only (single-point grounding), preventing ground-loop currents from superimposing noise onto the measurement signal. In installations near variable-frequency drives or high-current bus bars, this single-point shield termination is the primary defense against conducted interference. The probe body itself is constructed from 316 stainless steel, which is non-ferromagnetic and does not perturb the measurement field — a critical design constraint that distinguishes it from general-purpose inductive sensors.

The CN connector variant uses a threaded coaxial interface with defined contact resistance below 5 mΩ. Contact resistance stability over thermal cycling is a key reliability parameter: connector oxidation or fretting corrosion at this interface introduces a series impedance that shifts the apparent gap reading. The CN body uses gold-plated center contacts to maintain stable contact resistance across the –35°C to +177°C operating envelope.

System Integration Benefits

• Zero mechanical wear on the measurement path: Non-contact operation means probe sensitivity does not degrade with shaft rotation cycles. A probe installed on a 3,000 RPM turbine accumulates 1.58 billion shaft revolutions per year with no contact-induced drift.
• DC-coupled output enables static position measurement: The DC–10 kHz frequency response captures both dynamic vibration (AC component) and static shaft centerline position (DC component) simultaneously, eliminating the need for separate displacement sensors in thrust and radial measurement loops.
• API 670 compliance simplifies machinery protection certification: Installations in petrochemical and power generation facilities governed by API 670 can reference the probe’s compliance documentation directly, reducing the engineering review burden during HAZOP and SIL assessments.
• Matched system calibration eliminates field adjustment: The 330130 probe, 330180 Proximitor, and matched extension cable are factory-calibrated as a system. The 7.87 V/mm scale factor is valid for the complete assembly without field trimming, reducing commissioning time and eliminating technician-introduced calibration error.
• Wide temperature range covers steam turbine environments: The +177°C upper limit accommodates bearing housing temperatures in high-pressure steam turbines and hot-gas expanders where standard industrial sensors would require thermal standoffs or active cooling.
• CN connector compatibility with domestic infrastructure: Direct mechanical fit with Chinese-standard junction boxes and terminal assemblies eliminates adapter hardware, reducing connection count in the signal path and the associated failure modes.
• High-frequency response supports advanced diagnostic algorithms: The 10 kHz bandwidth captures sub-synchronous instability, oil whirl, and blade-passing frequencies in addition to 1X and 2X synchronous components, providing the raw data required for spectrum-based fault detection without signal bandwidth limitations.
• Single-point shield grounding architecture: The coaxial cable design with Proximitor-end shield grounding provides measurable common-mode noise rejection, maintaining signal integrity in switchgear rooms and motor control centers where radiated EMI levels exceed 10 V/m.

Quality Assurance & Global Logistics

Every 330130-00-03-10-02-CN unit dispatched from our Xiamen, China facility is sourced through documented supply channels with full batch traceability. Physical inspection covers label integrity, connector contact condition, cable sheath continuity, and probe tip surface condition. Units showing evidence of rework, re-marking, or non-OEM assembly are rejected at intake and not listed for sale.

Outbound shipments are processed from Xiamen with access to DHL Express, FedEx International Priority, and SF International air freight services. Transit times to major industrial hubs: Southeast Asia 2–4 business days, Europe 3–5 business days, North America 4–6 business days. For bulk orders exceeding 10 units, sea freight consolidation from Xiamen Port is available with full export documentation including commercial invoice, packing list, and certificate of origin. FORM E (ASEAN preferential tariff) is available upon request. All units ship with a 12-month warranty covering manufacturing defects and verified authenticity.

Contact Information

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