Bently Nevada 330910-00-16-10-02-00 Proximity Transducer System – 3300 XL Series

Bently Nevada 330910-00-16-10-02-00 — 16 mm Eddy Current Proximity Transducer System in the 3300 XL Platform

The 330910-00-16-10-02-00 is a complete, factory-matched eddy-current proximity transducer system within Bently Nevada’s 3300 XL product family. It consists of three mechanically and electrically interdependent components: a 16 mm diameter probe, a 10-metre extension cable, and a Proximitor® sensor. Together they form a calibrated measurement chain that converts shaft-to-probe gap displacement into a DC voltage signal with a nominal scale factor of 7.87 V/mm (200 mV/mil). The system is the primary sensing element for radial shaft vibration, axial thrust position, differential expansion, and eccentricity measurement in rotating machinery protection and condition monitoring applications governed by API 670.

In a typical turbomachinery protection loop, the Proximitor output feeds directly into a 3300 series monitor rack — such as the 3300/16 dual-channel vibration monitor or the 3300/20 thrust position monitor — where the analog voltage is compared against alarm and danger setpoints in real time. The deterministic response of the eddy-current chain, with a flat frequency response from DC to 10,000 Hz (–3 dB), ensures that both slow-roll eccentricity at startup and high-frequency sub-synchronous instabilities are captured within a single measurement channel without range switching or signal conditioning changes.

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Technical Parameters

Hardware Logical Analysis

The eddy-current measurement principle in the 330910-00-16-10-02-00 relies on a high-frequency oscillator circuit embedded in the Proximitor sensor, typically operating in the 1–2 MHz carrier frequency band. The probe coil, wound on a ferrite core and encapsulated in a stainless-steel housing, radiates an electromagnetic field perpendicular to the probe face. When a conductive target enters this field, eddy currents are induced on the target surface, loading the probe coil and reducing its effective Q-factor. The Proximitor demodulates this impedance change into a DC-proportional output voltage.

The 10-metre extension cable is not a passive conductor — it is an integral part of the tuned LC circuit. Its distributed capacitance and inductance are factored into the Proximitor’s oscillator design. Substituting a cable of different length or construction shifts the resonant frequency of the probe-cable-Proximitor network, producing a measurable scale factor error that cannot be corrected by field calibration alone. This is why the three components ship as a matched set with a single part number.

EMC performance is achieved through a combination of measures: the coaxial cable provides continuous 360° shielding from probe tip to Proximitor input; the Proximitor enclosure is die-cast aluminium with conductive gaskets at all seams; and the internal oscillator circuit uses a differential topology that rejects common-mode interference. In high-voltage switchgear environments or near variable-frequency drives, the system maintains output noise below 25 mV peak-to-peak — a figure that translates to less than 3.2 µm of apparent vibration at the 7.87 V/mm scale factor, well below the 25 µm alarm threshold typical in API 670 installations.

The Proximitor’s output stage is short-circuit protected and can drive cable loads up to 1,000 pF without bandwidth degradation, allowing the DC output to be routed to monitor racks over distances of up to 300 m using standard twisted-pair instrumentation cable without signal conditioning amplifiers.

System Integration Benefits

• Direct 3300 XL Monitor Compatibility: The –2 to –18 VDC output maps directly to the input range of 3300/16, 3300/20, 3300/25, and 3300/46 monitor modules with no signal conditioning, eliminating an entire tier of analog hardware from the signal chain.
• DC-Coupled Measurement Path: Unlike velocity transducers, the eddy-current system measures absolute gap from DC, enabling static position monitoring (thrust, differential expansion) and dynamic vibration within the same channel — reducing channel count and wiring cost in the monitor rack.
• Deterministic Alarm Response: The flat frequency response to 10 kHz and the absence of mechanical resonances in the non-contact probe ensure that the monitor rack receives an undistorted signal, allowing alarm setpoints to be set with confidence against actual shaft displacement rather than sensor-modified values.
• API 670 Compliance Out of the Box: The system meets the performance requirements of API 670 Fifth Edition for proximity transducer systems, including scale factor tolerance (±1%), frequency response, and temperature stability — eliminating the need for third-party compliance testing before installation.
• Hazardous Area Deployment: ATEX and FM certified variants allow installation in Zone 1 and Division 1 classified areas without additional barriers in many configurations, simplifying the safety instrumented system architecture.
• Predictive Maintenance Data Quality: The 200 mV/mil scale factor and DC-to-10 kHz bandwidth provide sufficient resolution and frequency coverage for orbit plot analysis, waterfall spectrum trending, and Bode plot generation during startup/shutdown — the primary diagnostic tools for rotating machinery condition assessment.
• Reduced Commissioning Time: Factory-matched and pre-calibrated sets eliminate field calibration procedures. Installation requires only gap setting to the nominal 1.0 mm (40 mil) operating point and verification of the –10 VDC output at that gap — a procedure completable in under 15 minutes per channel.
• Long-term Spare Parts Interchangeability: The 330910 part number series has maintained backward compatibility across multiple production generations. A replacement unit installed today will match the scale factor and connector pinout of units installed in the 1990s, protecting the owner’s investment in existing monitor racks and wiring infrastructure.

Quality Assurance & Global Logistics

Every 330910-00-16-10-02-00 unit offered through siemensplc.com is sourced from authorized Bently Nevada distribution channels or verified surplus inventory with full traceability documentation. Incoming inspection covers visual examination of probe tip and cable jacket integrity, dimensional verification of the probe thread and tip diameter, and functional testing of the Proximitor output at three gap positions (0.5 mm, 1.0 mm, and 1.5 mm) against the published scale factor tolerance of ±1%. Units that do not meet these criteria are quarantined and not offered for sale.

Packaging follows ESD-safe and moisture-barrier protocols: probe assemblies are individually bagged with desiccant, Proximitor sensors are packed in anti-static foam, and the complete set is boxed with original Bently Nevada labeling and serialization preserved. Tamper-evident seals on the outer carton provide chain-of-custody assurance from our Xiamen warehouse to the end destination.

Shipments originate from Xiamen, China, with DHL Express and FedEx International Priority as primary carriers. Typical transit times are 3–5 business days to Europe, 4–6 business days to North America, and 2–4 business days to Southeast Asia. Full export documentation — commercial invoice, packing list, certificate of origin, and HS code 9031.80.9090 classification — is prepared for every shipment. For orders requiring ATEX documentation or material test certificates, additional lead time of 2–3 business days applies.

A 12-month warranty covers defects in materials and workmanship from the date of shipment. Technical support for installation, gap setting, and system integration is available via email and WhatsApp at no additional charge.

Contact Information

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