Description
1. Product Overview
Bently Nevada 330104‑00‑25‑10‑02‑00 is an 8 mm eddy‑current proximity probe from the Bently Nevada 3300 XL series. As a core sensing device dedicated to rotating‑machinery condition‑monitoring systems, it fully complies with the API 670 industrial standard. This armoured high‑precision displacement‑vibration sensor is designed for high‑speed rotating machinery. It enables non‑contact real‑time measurement of critical mechanical parameters including shaft vibration, shaft displacement, differential expansion and shaft run‑out. Featuring high measurement accuracy, excellent thermal stability, strong electromagnetic‑interference resistance and zero long‑term drift, it is suitable for key rotating equipment such as steam turbines, compressors, fans and pump units. Widely deployed in power, petrochemical, oil‑gas and coal‑chemical industries, it serves as a front‑end acquisition unit for unit fault prediction, condition early‑warning and equipment protection.
2. Core Functions
- Non‑contact High‑precision Dynamic Monitoring: Adopts the eddy‑current induction principle to measure radial vibration, axial displacement, shaft eccentricity and thermal differential expansion of rotating shafts without physical contact. Free from mechanical wear and contact loss, it supports long‑term continuous and stable acquisition of dynamic equipment‑operation data.
- Stable Measurement Output Over Wide‑temperature Range: Delivers outstanding temperature‑adaptive performance and maintains stable linearity and sensitivity under wide high‑low‑temperature conditions. It effectively eliminates data deviation caused by temperature drift and adapts to harsh field environments with high temperature and drastic temperature fluctuation.
- Strong Anti‑interference Performance for Industrial Conditions: Constructed with shielded armoured cable, it provides excellent EMI/RFI immunity against frequency‑converter interference, high‑voltage radiation and mechanical vibration on‑site, ensuring pure and stable signal transmission.
- Standard‑linear High‑sensitivity Sampling: Maintains a fixed standard sensitivity of 7.87 V/mm with a stable linear range and high repeatability. It accurately captures tiny abnormal vibration and displacement variations, supplying reliable data for early‑stage fault diagnosis and trend analysis.
- Long‑term Durable Operation Under Full‑range Conditions: The probe body is made of 304 stainless‑steel with corrosion‑resistant sealing structure. It is dust‑proof, water‑resistant, oil‑proof and anti‑aging, suited for humid, dusty and oil‑rich industrial sites with long service life.
- System‑compatible Linked Monitoring: Can be matched with Bently Nevada proximitors, 3500 monitoring systems and upper‑level configuration platforms to realize integrated workflow of data acquisition, calculation‑analysis, over‑limit alarm and interlock protection, supporting predictive maintenance and safety management of machinery.
3. Technical Specifications
| Parameter Item | Technical Specification |
|---|---|
| Product Model | 330104‑00‑25‑10‑02‑00 |
| Product Series | Bently Nevada 3300 XL 8 mm Series |
| Product Type | Eddy‑current Displacement / Vibration Monitoring Probe |
| Probe Size | 8 mm Standard Monitoring Probe |
| Standard Sensitivity | 7.87 V/mm (200 mV/mil) |
| Effective Linear Measuring Range | 0‑2 mm High‑precision Linear Zone |
| Thread Specification | M10×1 Standard Metric Thread |
| Total Cable Length | 5 m (Standard Custom‑built Configuration) |
| Probe Operating Temperature | -52 ℃ ~ +177 ℃ |
| Outer‑shell Material | AISI 304 Stainless Steel |
| Sealing Material | Viton Fluoro‑rubber, High‑temperature and Corrosion Resistant |
| Protection Class | IP67 Dust‑proof and Water‑proof |
| Applicable Standard | API 670 International Machinery‑monitoring Standard |
| Core Features | Non‑contact measurement, minimal temperature drift, strong anti‑interference, high precision, superior stability |
4. Working Principle
The Bently Nevada 330104‑00‑25‑10‑02‑00 probe realizes non‑contact dynamic monitoring based on the high‑frequency eddy‑current induction principle. The matched proximitor supplies high‑frequency alternating current to the probe coil and generates a high‑frequency alternating magnetic field around the probe. When a metallic rotating shaft enters the magnetic‑field coverage, eddy currents are induced on the metal surface.
The energy loss of eddy currents and magnetic‑field coupling intensity change linearly with the gap distance between the probe and the measured shaft, which causes synchronous impedance variation of the probe coil. The proximitor converts the impedance variation into a standard linear voltage‑output signal. The monitoring system calculates shaft‑vibration amplitude, axial displacement, eccentricity and other parameters from voltage values for continuous equipment‑condition monitoring. When early‑stage faults such as excessive vibration or abnormal shaft displacement are detected, the system triggers early warning and interlock‑protection logics to prevent severe accidents including rotor‑to‑stator rub and unplanned shutdown.
5. System Architecture Compatibility
This probe is a standard sensing component for the Bently Nevada 3300 XL monitoring ecosystem. It can seamlessly work with Bently Nevada 3300‑series proximitors and 3500 / 3300 rack‑based monitoring systems. Plug‑and‑play with fully‑matched parameters, it can be put into service without extra calibration.
Its output signal conforms to industrial analog‑acquisition standards and can be directly connected to various DCS, PLC and upper‑level condition‑monitoring platforms to achieve centralized vibration‑data collection, trend archiving and remote monitoring. Equipped with the widely‑adopted M10 threaded mounting structure, it is compatible with most industrial monitoring brackets and bases. It supports replacement of legacy equipment and monitoring‑system expansion with excellent universality and adaptability.
6. Application Scenarios
This product is applied for condition monitoring and fault early warning of critical high‑speed rotating industrial machinery operating continuously under heavy loads. In the power‑generation industry, it performs real‑time monitoring on shaft vibration, axial displacement and differential expansion for steam‑turbine and gas‑turbine generator‑sets. In petrochemical plants, it monitors large centrifugal compressors, boosters, process pumps and fans.
It is widely used in coal‑chemical industry, long‑distance oil‑gas pipelines, metallurgy, air‑separation facilities and other fields. As the front‑end sensor of on‑line machinery‑monitoring systems, it detects early abnormal vibration and displacement faults, providing precise data support for equipment inspection, trend analysis, maintenance planning and interlock protection. It guarantees long‑term safe, stable and failure‑free continuous operation of large rotating equipment.
