Bently Nevada 330101-00-24-10-02-00 Proximity Transducer – 3300 XL Series

Bently Nevada 330101-00-24-10-02-00 — 8 mm Eddy-Current Proximity Transducer for Rotating Machinery Protection

The Bently Nevada 330101-00-24-10-02-00 is an 8 mm diameter eddy-current proximity transducer engineered for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion in high-speed rotating machinery. It operates as the sensing element within the 3300 XL Proximity Transducer System — a three-component architecture comprising the probe, an extension cable, and a Proximitor® driver module. Each element of this system is electrically matched; substituting non-OEM components alters the system’s transfer function and invalidates API 670 calibration.

The transducer’s part number encodes its configuration: 24-inch integral cable, 10-foot extension cable, standard temperature rating (−35 °C to +121 °C), and coaxial connector termination. This specific configuration is widely deployed in steam turbine, gas turbine, and centrifugal compressor protection trains where API 670 compliance is mandatory.

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Technical Parameters

Hardware Logical Analysis

The 330101-00-24-10-02-00 operates on the principle of high-frequency electromagnetic induction. The probe tip generates an oscillating magnetic field at approximately 1 MHz. When a conductive target (shaft) enters the field, eddy currents are induced on the target surface, loading the oscillator circuit and producing a proportional change in output voltage. The Proximitor® driver demodulates this signal and outputs a DC voltage linearly proportional to the gap distance at 200 mV/mil.

EMC Design: The coaxial cable construction provides inherent shielding against radiated electromagnetic interference. The shield is grounded at the Proximitor® driver end only (single-point grounding), preventing ground-loop currents that would introduce 50/60 Hz noise into the measurement chain. In environments with high-frequency switching drives (VFDs), the armoured outer jacket provides an additional Faraday barrier, maintaining signal integrity at gap-change frequencies up to 10 kHz — well above the mechanical vibration frequencies of interest (typically 10–1000 Hz for rotating machinery).

Thermal Stability: The probe body is constructed from 316 stainless steel with a ceramic-filled epoxy tip. This material combination maintains dimensional stability across the rated temperature range, limiting thermal drift of the zero-gap output to less than ±0.5% of full scale over the operating envelope. In steam turbine casings where ambient temperatures can reach 100 °C continuously, this thermal coefficient is critical for maintaining alarm and trip setpoint accuracy.

Impedance Matching: The 3300 XL system is a matched impedance chain. The probe, extension cable, and Proximitor® driver are factory-calibrated as a set. The extension cable’s characteristic impedance (nominally 95 Ω) is matched to the probe’s coaxial cable to prevent reflections that would distort the oscillator’s loading characteristic. Mixing cable lengths or substituting third-party cables shifts the system’s sensitivity from the nominal 200 mV/mil, introducing systematic measurement error that cannot be corrected by field calibration alone.

System Integration Benefits

• API 670 compliance out of the box: The 330101-00-24-10-02-00 is factory-calibrated to meet API 670 Annex D sensitivity tolerances (±1% of nominal), eliminating the need for field calibration when replacing a like-for-like unit in an existing 3300 XL installation.
• Deterministic signal latency: The eddy-current measurement chain introduces no mechanical hysteresis or contact bounce. Signal propagation from shaft displacement to Proximitor® output is governed by the oscillator’s time constant (typically <1 ms), supporting monitoring system scan rates of 1 kHz and above without aliasing artefacts.
• Direct compatibility with 3500 Series monitors: Output voltage range (−2 VDC to −18 VDC at the Proximitor® output) maps directly to the input range of Bently Nevada 3500/40M, 3500/42M, 3500/45, and 3500/46M monitor modules without signal conditioning adapters.
• Diagnostic transparency: The Proximitor® driver’s OK output relay de-energises when the probe gap falls outside the linear range or the cable is open/shorted, providing a hardware-level fault signal to the DCS or safety system independent of the vibration measurement channel.
• Non-intrusive installation: The 8 mm probe diameter accommodates standard API 670 proximity probe boss dimensions (M10×1 thread), allowing installation and removal without disturbing the shaft seal or bearing housing assembly.
• Hazardous-area deployment: ATEX and FM approvals permit installation in Zone 1/Division 1 classified areas (gas group IIC, temperature class T4) without additional barriers when used with the approved Proximitor® driver, reducing BOM complexity in petrochemical applications.
• Long-term spare-parts availability: The 3300 XL platform has been in continuous production for over two decades. The 330101-00-24-10-02-00 remains an active catalog part, ensuring availability for the operational life of installed turbomachinery without obsolescence risk.
• Reduced commissioning time: Factory-matched sensitivity eliminates the multi-point calibration procedure required for generic eddy-current sensors. A single gap-setting verification at the nominal 50 mil (1.27 mm) centre-of-range gap is sufficient to confirm correct installation.

Quality Assurance & Global Logistics

Every unit of the Bently Nevada 330101-00-24-10-02-00 supplied by siemensplc.com is sourced through verified industrial supply channels with full chain-of-custody documentation. Prior to dispatch, each transducer undergoes a structured inspection protocol: visual examination of the probe tip, cable jacket, and connector for mechanical damage or counterfeit indicators; electrical continuity measurement of the coaxial cable; and output sensitivity verification using a calibrated gap-setting fixture traceable to NIST standards. Units that do not meet OEM specification tolerances are quarantined and not shipped.

Logistics operations are managed from Xiamen, China, a major port city with direct access to international express freight networks. Standard dispatch lead time for in-stock units is 1–3 business days. International shipments are handled via DHL Express, FedEx International Priority, and UPS Worldwide Express, with typical transit times of 3–7 business days to Europe, North America, the Middle East, and Southeast Asia. All export documentation — commercial invoice, packing list, HS code classification (HS 9031.80), and certificate of origin — is prepared in compliance with destination-country import requirements. Bulk orders of 5 or more units qualify for consolidated freight pricing; contact us for a project-specific logistics proposal.

Contact Information

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