Description
1. Product Introduction
The Bently Nevada 330104‑00‑13‑10‑02‑CN is an 8 mm high‑precision eddy‑current displacement‑vibration sensor from the 3300 XL product family. Designed in strict compliance with the API 670 international machinery‑protection standard and industrial EMC specifications, it serves as the core sensing hardware for rotating‑machinery condition‑monitoring and equipment‑protection systems.
Purpose‑built for large high‑speed rotating equipment, this sensor adopts non‑contact eddy‑current measurement technology. Without physical contact with the monitored shaft, it delivers long‑term stable measurement of critical parameters including radial shaft vibration, axial displacement, shaft eccentricity and key‑phase speed. It is widely deployed on gas turbines, steam turbines, compressors, fans, pumps and other major industrial rotating assets.
Featuring an integrated precision probe, fully‑shielded interference‑resistant cable and high‑temperature corrosion‑resistant industrial materials, the sensor offers high‑measurement accuracy, excellent linearity, low‑temperature drift, strong anti‑interference performance and zero mechanical wear. It reliably operates under harsh conditions in power‑equipment rooms, such as high ambient temperature, continuous vibration, oil‑gas corrosion and intense frequency‑converter electromagnetic interference, supporting 7×24‑hour non‑stop on‑line monitoring. It is an original core sensing component for new‑build monitoring‑system configuration, legacy‑sensor replacement, monitoring‑accuracy upgrading and predictive‑maintenance fault‑diagnosis of industrial machinery.
2. Functions and Working Principle
Core Functions
The 330104‑00‑13‑10‑02‑CN integrates six core capabilities: dynamic shaft‑vibration monitoring, static‑displacement measurement, shaft‑eccentricity detection, key‑phase speed‑signal acquisition, high‑fidelity process‑signal transmission and early‑warning detection of equipment anomalies. It fully satisfies data‑acquisition requirements for condition monitoring and fault diagnosis of large rotating machinery.
It captures tiny radial‑vibration amplitudes, axial‑displacement offsets and shaft‑deformation parameters of high‑speed rotors in real‑time. Mechanical physical displacement is converted linearly into a standard analog‑voltage signal and uploaded to Bently monitoring platforms such as the 3500 and 3300 systems. It provides accurate data support for fault diagnosis, interlock protection and trend analysis of typical issues including excessive vibration, over‑limit axial displacement, rotor‑stator rub and rotor unbalance.
With superior signal fidelity and noise immunity, it filters signal distortion induced by industrial‑site electromagnetic noise, frequency‑converter interference and mechanical resonance, ensuring continuous, stable and jitter‑free long‑term monitoring data and improving overall operational safety and fault‑prediction reliability for rotating equipment.
Working Principle
This sensor operates on the principle of high‑frequency non‑contact eddy‑current induction measurement, forming a complete monitoring system together with a proximitor. When high‑frequency alternating current is supplied to the internal coil of the probe, a high‑frequency alternating magnetic‑field is generated at the probe tip. As the metallic shaft target enters this magnetic‑field, closed eddy currents are induced on the metal surface.
The magnitude and distribution density of the eddy‑currents vary dynamically with the gap distance between probe and target, which in turn changes the impedance, inductance and output‑voltage parameters of the probe coil. The sensor captures these electrical variations and converts physical variables such as gap distance and vibration displacement into a proportional standard DC‑voltage signal via linear calibration algorithms.
The whole measurement process is contact‑free and friction‑free, delivering fast‑response speed and a stable linear range. Both steady‑state static‑displacement and high‑frequency dynamic‑vibration signals can be acquired simultaneously. Combined with the backend monitoring system, it enables real‑time shaft‑condition tracking, trend logging and over‑limit protection, ensuring controllable, stable and safe operation of rotating machinery.
3. Technical Features
Standard 8 mm form factor with outstanding universality: The industry‑standard 8 mm probe is fully compatible with the complete 3300 XL proximitor range and the 3500 monitoring system, and interoperable with third‑party rotating‑machinery monitoring equipment. Replacement installation requires no modification to monitoring logic or field wiring, making it suitable for major units across power, chemical, petrochemical and other industries.
Ultra‑high measurement accuracy and excellent linear performance: Equipped with factory‑calibrated precision coils, it provides a standard sensitivity of 7.87 V/mm with a stable linear range, minimal linear error and low‑temperature drift. Micro‑meter‑level vibration and displacement changes of rotating shafts can be detected precisely, preventing missed or false fault judgements caused by measurement deviation.
Non‑contact measurement, loss‑free long service life: No physical contact between probe and shaft eliminates friction‑induced wear, preventing accuracy degradation and lifetime reduction commonly seen in contact‑type sensors, and supporting continuous long‑term operation of high‑speed rotating equipment.
Robust anti‑interference design for wide‑ranging operating conditions: Fully‑shielded cable construction and electromagnetic‑interference suppression have passed high‑grade industrial EMC testing. The sensor resists intense electromagnetic radiation, frequency‑converter noise, equipment resonance and crosstalk, delivering distortion‑free jitter‑stable signal transmission under harsh‑site conditions.
Wide‑temperature corrosion‑resistant construction suited to severe environments: Probe and cable are manufactured from high‑temperature‑resistant, oil‑gas‑corrosion‑resistant materials, delivering stable operation from −52 ℃ to +177 ℃ and tolerating high temperature, humidity, oil‑gas dust and continuous vibration to support round‑the‑clock on‑line monitoring.
- Maintenance‑free design for convenient, cost‑efficient operation: A purely‑passive hardware sensing unit contains no consumable components. No periodic recalibration or routine maintenance is required after commissioning. Only regular inspection is needed, significantly reducing maintenance costs and inspection frequency for machinery‑monitoring systems.
4. Specifications
Basic Parameters
Product Model: 330104‑00‑13‑10‑02‑CN Brand & Manufacturer: Bently Nevada Product Series: 3300 XL 8 mm Eddy‑Current Sensor Series Applicable System: Bently 3300 / 3500 Rotating‑Machinery Condition‑Monitoring System Product Type: Non‑Contact Shaft‑Vibration & Axial‑Displacement Monitoring Sensor Applicable Standards: API 670 Machinery‑Protection Standard, IEC Industrial‑EMC Standard, Bently‑Nevada factory precision‑measurement specifications Primary Purpose: Radial shaft‑vibration, axial‑displacement, shaft‑eccentricity and key‑phase speed monitoring for rotating units; fault diagnosis, process‑data acquisition and safety interlock protection
Core‑Performance Parameters
Operating Principle: High‑frequency eddy‑current induction measurement, non‑contact dynamic + static monitoring Probe Size: Standard 8 mm probe Nominal Sensitivity: 7.87 V/mm (200 mV/mil) Linear Measurement Range: 0.25 mm ~ 2.3 mm (10 ~ 90 mils) Recommended Installation Gap: 1.27 mm (50 mils) Frequency Response: 0 Hz ~ 10 kHz, supporting high‑frequency vibration acquisition Linearity Accuracy: Very low full‑range linear error; zero‑parameter drift during long‑term operation Output Signal: Standard DC analog‑voltage signal for high‑precision system acquisition
Electrical Parameters
Power Supply: Powered via proximitor, −17.5 VDC ~ −26 VDC Maximum Operating Current: 12 mA Immunity Grade: High‑level EMI/RFI electromagnetic shielding against industrial high‑frequency interference Measurement Mode: Dual‑mode high‑precision measurement for dynamic vibration and static displacement
Mechanical & Physical Parameters
Mechanical Construction: Integrated precision probe, fully‑shielded wear‑resistant corrosion‑proof cable, reinforced anti‑vibration housing Mounting Method: Bracket‑fixed installation compatible with various measuring‑point layouts Maintenance Characteristics: Calibration‑free, maintenance‑free; fast fault‑localization and replacement‑capable
Environmental Parameters
Probe Operating Temperature: −52 ℃ ~ +177 ℃ Cable Operating Temperature: −52 ℃ ~ +177 ℃ Storage Temperature: −60 ℃ ~ +200 ℃ Relative Humidity: 5 %‑95 % RH, non‑condensing Environmental Resistance: Immunity to strong electromagnetic interference and mechanical shock; oil‑gas‑corrosion‑resistant, high‑temperature‑ and humidity‑resistant, suitable for 7×24‑hour continuous on‑line monitoring of industrial equipment
5. Application Scenarios
The Bently Nevada 330104‑00‑13‑10‑02‑CN sensor is widely deployed within condition‑monitoring systems for high‑speed rotating equipment in thermal‑power plants, gas‑fired power stations, combined‑heat‑and‑power facilities, petrochemical plants, coal‑chemical sites, heavy‑industry manufacturing complexes and oil‑gas stations. It is core sensing hardware for fault prediction, safety protection and stable operation of large rotating machinery.
Typical applications include: shaft‑vibration and axial‑displacement monitoring for turbo‑generator sets; shaft‑eccentricity and key‑phase speed acquisition for gas turbines; condition monitoring of large centrifugal and screw compressors; dynamic‑parameter acquisition for large‑scale industrial fans and pumps; original‑equipment replacement of monitoring sensors on legacy machinery; accuracy‑upgrade retrofits of condition‑monitoring systems; unattended on‑line monitoring of high‑risk power equipment; vibration‑anomaly fault diagnosis and trend analysis; compliance‑monitoring hardware for industrial rotating machinery; and data support for predictive maintenance of power assets.
As a classic high‑precision 8 mm eddy‑current sensor of the 3300 XL series, it leverages its core strengths: non‑contact loss‑free measurement, ultra‑high accuracy, stable wide‑temperature performance, robust interference‑resistant signal transmission and long‑term maintenance‑free operation. It addresses common‑industry pain‑points of traditional monitoring sensors, such as wear‑induced ageing, precision drift, interference susceptibility and signal distortion. It mitigates risks of unplanned shutdown, component damage and safety incidents caused by shaft rub, rotor unbalance, bearing failure and excessive displacement. It comprehensively guarantees safe, stable and efficient long‑term operation of large rotating power‑machinery, and serves as the preferred original core sensor for new‑system deployment, legacy‑system retrofits and maintenance‑service projects of industrial rotating‑machinery condition‑monitoring systems.
