Description
1. Product Introduction
Bently Nevada 330101‑12‑40‑10‑02‑CN is an 8 mm eddy‑current displacement sensor probe of Baker Hughes‑Bently Nevada 3300 XL series. It serves as core non‑contact monitoring hardware for large‑scale rotating machinery and fully complies with API 670 international industrial standard.
Designed for rotating equipment with sleeve bearings such as steam turbines, fans, compressors and pump units, this probe forms a complete eddy‑current sensor monitoring system together with 3300 XL proximitors. It is mainly used for long‑term on‑line monitoring of key rotor‑dynamic parameters including shaft vibration, shaft displacement, eccentricity, phase‑reference speed and thermal expansion difference.
Adopting high‑temperature‑resistant PPS probe material and fully‑shielded flame‑retardant cable, the product features non‑contact measurement, zero mechanical wear, wide temperature tolerance, oil‑moisture resistance and high electromagnetic‑interference immunity. It fits harsh industrial sites in thermal‑power, oil‑gas, chemical and metallurgical industries and supports 7×24‑hour uninterrupted steady‑state unit operation. It is an original core probe for condition monitoring, fault prediction, equipment maintenance and spare‑part replacement of large rotating machinery.
2. Functions and Working Principle
Core Functions: This eddy‑current probe realizes precise non‑contact measurement of dynamic and static parameters of rotating metal shafts. Its five core functions cover radial‑vibration‑amplitude acquisition, rotor axial‑displacement monitoring, rotor eccentricity detection, key‑phasor speed‑signal pickup and unit thermal‑expansion‑difference monitoring.
It captures tiny dynamic run‑out, axial‑shifting and static offset of rotors in real time, and converts mechanical‑displacement variation into continuous linear‑voltage signals transmitted to proximitors and monitoring systems. It provides high‑precision raw data for unit vibration analysis, fault diagnosis, interlock protection and condition early‑warning, and effectively avoids major equipment failures such as shaft‑system friction, rotor‑stator rubbing and excessive shaft displacement.
Working Principle: High‑frequency alternating excitation current is supplied to the internal coil of the probe by the proximitor, generating a high‑frequency alternating magnetic field at the probe tip. When the metal shaft approaches the probe‑induced magnetic field, closed eddy currents are induced on the shaft surface. According to electromagnetic‑induction theory, the magnitude and distribution of eddy currents vary linearly with the gap distance between probe and shaft, further changing the equivalent impedance and oscillation amplitude of the probe coil.
The sensor system accurately converts impedance variation into linear analog‑voltage output. Gap distance and output voltage maintain a standard linear correlation. Physical parameters such as shaft vibration and shaft displacement are calculated in real time by the system via voltage‑value conversion. The whole process involves no physical contact or frictional loss, enabling stable capture of tiny dynamic variations of high‑speed rotors. Meanwhile, signal self‑diagnosis is available to identify probe open‑circuit, short‑circuit, abnormal gap and other faults, ensuring continuous and reliable monitoring data.
3. Technical Features
Non‑contact Non‑destructive Measurement: Based on eddy‑current‑induction monitoring principle, there is no physical contact or mechanical wear between probe and measured shaft. It adapts to high‑speed continuously‑running units, enables long‑term stable monitoring of rotor dynamic parameters and greatly reduces equipment‑maintenance loss.
Ultra‑high‑linearity Measurement Accuracy: Standard linear range is 2 mm with rated sensitivity of 7.87 V/mm (200 mV/mil). Full‑span linearity error is extremely low. It can accurately capture micron‑level vibration and displacement variations of rotors and meet requirements for precise rotor‑dynamic analysis.
Wide‑temperature‑range Adaptability for Harsh Conditions: The probe body is made of high‑strength PPS engineering material with high‑temperature‑resistance, corrosion‑resistance and anti‑aging performance. It tolerates complex on‑site conditions including high temperature, oil contamination, moisture and dust, and suits long‑term continuous unit operation.
Strong Anti‑interference Capability and High Signal Stability: Equipped with dedicated fully‑shielded signal cables, it effectively suppresses on‑site electromagnetic interference, power‑frequency interference and signal crosstalk, and eliminates signal jitter, drift and distortion. It guarantees continuity and accuracy of monitoring data under harsh industrial environments.
Excellent Industrial‑standard Compatibility: Fully compliant with API 670 industry standard for petrochemical‑equipment monitoring. It is compatible with full‑range 3300 XL proximitors and Bently Nevada monitoring systems, featuring strong universality, convenient commissioning and simple configuration.
- Full‑condition Fault Self‑diagnosis: Cooperated with proximitors, it realizes self‑diagnosis for probe open‑circuit, short‑circuit, excessive installation gap, signal anomalies and other faults. It quickly locates monitoring‑loop faults for convenient maintenance troubleshooting and ensures reliable commissioning of unit monitoring systems.
4. Specifications
Basic Parameters
Product Model: 330101‑12‑40‑10‑02‑CN Brand‑Manufacturer: Bently Nevada (Baker Hughes) Product Type: 3300 XL 8 mm Eddy‑current Probe Applicable System: Full‑range 3300 XL proximitors and monitoring systems of Bently Nevada Compliance Standard: API 670 Industrial‑equipment Vibration‑monitoring Standard Probe Specification: 8 mm standard monitoring probe
Core Electrical‑performance Parameters
Rated Sensitivity: 7.87 V/mm (200 mV/mil) Standard Linear Range: 0～2 mm Linearity Accuracy: High full‑span linearity with minimal error Frequency Response: 0～10 kHz, covering vibration‑frequency range under all unit operating conditions Power Supply: Powered by matched proximitor: ‑17.5 VDC～‑26 VDC Insulation Resistance: ≥100 MΩ @500 V, excellent insulation performance
Mechanical‑dimension Parameters
Thread Specification: M12×1 standard mounting thread Cable Length: 4.0 m custom‑made shielded cable Mounting Method: Thread‑locking fixed installation, compatible with standard unit measuring‑point brackets Structure & Process: High‑temperature‑resistant PPS probe housing, fully‑shielded flame‑retardant signal cable, corrosion‑resistant and anti‑aging structure
Environmental‑condition Parameters
Probe Operating Temperature: ‑52 ℃～+177 ℃ Cable Operating Temperature: ‑52 ℃～+177 ℃ Storage Temperature: ‑40 ℃～+85 ℃ Operating Humidity: 5%～95%RH, non‑condensing Condition Characteristics: Oil‑resistance, moisture‑resistance, dust‑resistance, industrial‑grade EMC electromagnetic‑interference immunity, suitable for long‑term uninterrupted unit operation
5. Application Scenarios
Bently Nevada 330101‑12‑40‑10‑02‑CN probe is widely applied in on‑line‑condition‑monitoring systems for large rotating machinery in thermal‑power, gas‑power generation, petroleum‑refining, coal‑chemical, oil‑gas‑storage‑transportation and heavy‑metallurgy industries.
Typical application scenarios include: on‑line shaft‑vibration and shaft‑displacement monitoring for steam‑turbine generator sets and gas‑turbine units; rotor‑condition monitoring of large‑scale centrifugal / screw compressors; shaft‑system‑vibration monitoring of large‑industrial fans, water pumps and booster pumps; monitoring of rotor eccentricity and thermal‑expansion difference; acquisition of key‑phasor speed signals; shaft‑system‑condition early‑warning during unit start‑stop and steady‑state operation; fault diagnosis and trend analysis for rotating equipment.
As a core monitoring probe for Bently Nevada 3300 XL system, it features high precision, high stability, long service life and maintenance‑free performance. It accurately captures early minor hidden faults of shaft systems and provides core‑data support for equipment‑condition‑based maintenance, interlock protection and safe‑stable unit operation. It is critical original hardware for new installation, retrofit and fault‑spare‑part replacement of monitoring systems for large‑scale high‑risk industrial rotating machinery.
