Description
1. Product Introduction
Bently Nevada 330101‑00‑09‑10‑02‑CN is an 8 mm ultra‑short unthreaded‑housing eddy‑current displacement proximity probe of the Baker Hughes‑Bently Nevada 3300 XL series. Complying strictly with API 670 international standard for rotating‑machinery condition monitoring, it serves as original compliant core sensing hardware for shaft‑system monitoring of large‑scale rotating‑equipment under conditions of extremely compact space, embedded flush‑mounting and unthreaded measuring‑points.
This standard‑mount probe features non‑armored construction, 9 mm ultra‑short unthreaded smooth‑bar housing, 1.0‑meter original‑equipment shielded flame‑retardant cable, standard Mini ClickLoc self‑locking connector and CN domestic‑compliant version. It is one of the shortest housing variants within the 330101 series. Specially designed for restricted applications including narrow pre‑bored mounting holes, end‑face flush‑embedded installation, unthreaded limit‑fixing and extremely shallow equipment cavities. It resolves common industry pain‑points: mechanical interference caused by conventional threaded probes, insufficient space for long‑housing probes, and oversized regular unthreaded probes incompatible with miniature measuring‑points.
When paired with 3300 XL‑series proximitor sensors, it forms a complete eddy‑current monitoring system. It is widely applied to sleeve‑bearing rotating‑machinery such as steam‑turbine units, gas‑turbines, centrifugal compressors, large‑size industrial fans and high‑pressure pump sets in thermal‑power generation, gas‑power generation, petroleum refining, coal‑chemical industry and heavy‑metallurgy. It performs long‑term on‑line monitoring of key rotor‑dynamic parameters: radial shaft vibration, axial shaft displacement, rotor eccentricity, Keyphasor speed and unit thermal‑expansion difference.
Constructed with 304 stainless‑steel corrosion‑resistant anti‑aging housing, high‑temperature‑resistant industrial materials and fully‑shielded tri‑axial cable, it offers advantages of non‑contact loss‑free measurement, zero mechanical wear, oil resistance, moisture resistance, dust & corrosion resistance, superior electromagnetic‑interference immunity and stable wide‑temperature operation. It supports 7×24‑hour uninterrupted steady‑state unit operation. It is dedicated original‑equipment spare‑part for new‑installation of ultra‑compact miniature measuring‑points, replacement of aged 9 mm unthreaded probes and retrofits of monitoring systems in confined spaces.
2. Functions and Working Principle
Core Functions: This ultra‑short unthreaded‑housing eddy‑current proximity probe realizes high‑precision acquisition of dynamic and static parameters for large metal rotating shafts under extremely‑confined‑space, shallow‑cavity pre‑bore and flush‑embedded mounting conditions. Its five core monitoring functions include rotor radial‑vibration‑amplitude monitoring, axial‑displacement wandering monitoring, rotor‑eccentricity detection, Keyphasor speed‑signal pickup and unit thermal‑expansion‑difference monitoring.
Benefiting from the ultra‑compact 9 mm unthreaded smooth‑bar housing design, it perfectly fits miniature shallow cavities, narrow pre‑bored holes and flush non‑protruding measuring‑points inaccessible to conventional probes, without housing interference or extra mounting footprint. It captures micron‑level minor run‑out, axial offset and dynamic deformation of rotors in real‑time, and linearly converts mechanical‑gap displacement into standard analog‑voltage signals for stable transmission to proximitor sensors and downstream monitoring systems.
It provides reliable raw data for refined unit vibration‑trend analysis, incipient micro‑fault prediction, subtle rotor‑stator‑rubbing hazard inspection, shaft‑displacement‑over‑limit interlock protection and accurate equipment‑condition early‑warning. It effectively mitigates risks of unplanned shutdown induced by slight shaft‑system abrasion, latent abnormal vibration and progressive equipment failures.
Working Principle: The matched 3300 XL proximitor sensor supplies high‑frequency alternating excitation‑current to the internal coil of the probe, generating a stable high‑frequency alternating magnetic‑field at the probe sensing face. As the metal rotor approaches this magnetic‑field, closed eddy‑currents are induced on the rotor surface. The intensity and distribution density of eddy‑currents vary precisely and linearly with the gap distance between probe and rotor, which correspondingly changes the equivalent impedance and oscillation amplitude of the probe coil.
The system collects impedance variations in real‑time and converts them into linear analog‑voltage output via proprietary factory algorithms. A standard linear correlation is maintained between probe‑to‑target gap and output‑voltage to achieve continuous and stable measurement of vibration, displacement, eccentricity and thermal‑expansion‑difference.
Adopting integrated 9 mm ultra‑short unthreaded smooth‑bar structure, the probe features compact outline, flush mounting without protrusion or mechanical interference, and suits installation in various shallow‑cavity and miniature enclosed spaces. Operating without physical contact or mechanical wear, it adapts to long‑term continuous‑run of high‑speed rotors. Cooperated with the proximitor sensor, it implements self‑diagnosis for loop open‑circuit, short‑circuit, abnormal mounting‑gap, signal‑drift and impedance‑deviation faults to fully guarantee authentic, continuous, stable and reliable monitoring data for measuring‑points in confined spaces.
3. Technical Features
Ultra‑short Unthreaded Ultra‑compact Design: Equipped with industry‑compact 9 mm unthreaded smooth‑bar short housing. Thread‑free structure with minimal housing length, customized for shallow cavities, miniature pre‑bored holes and extremely confined measuring‑points. Mounts fully flush without protrusion to eliminate operational mechanical interference, and is a dedicated solution for restricted miniature installation conditions.
Industrial‑Grade High‑precision Stable Measurement: Standard 8 mm probe specification, rated sensitivity 7.87 V/mm (200 mV/mil), standard linear range 2 mm. Low full‑scale linear error, measurement accuracy complies with high‑end API 670 industrial monitoring specifications. It accurately captures micron‑level rotor vibration and minor displacement variations with drift‑free stable output.
Non‑contact Loss‑free Long‑term Monitoring: Adopts eddy‑current induction principle for non‑contact measurement. No physical friction or mechanical loss between probe and high‑speed rotating rotor, eliminating periodic replacement due to wear. It enables long‑term stable monitoring of unit shaft‑system dynamic‑parameters and greatly reduces maintenance difficulty and shutdown‑related losses for measuring‑points in confined spaces.
Superior Adaptability to Harsh Operating Conditions: Constructed from 304 stainless‑steel corrosion‑resistant housing and high‑temperature‑resistant anti‑aging engineering‑materials with wide operating‑temperature range. The assembly delivers oil‑resistance, moisture‑resistance, dust & corrosion‑resistance and strong industrial electromagnetic‑interference immunity. It withstands severe conditions including high‑temperature, minor mechanical‑vibration, humidity and dust for round‑the‑clock continuous steady‑state operation.
Standardized Universal‑Compatibility Design: Fitted with original Mini ClickLoc self‑locking quick‑disconnect connector and 1.0‑meter standard tri‑axial‑shielded flame‑retardant cable in lightweight non‑armored construction. It delivers convenient wiring, simple mounting and high configuration compatibility with seamless interoperability across the full 3300 XL proximitor and condition‑monitoring product portfolio.
- Intelligent Fault Self‑diagnosis for Simplified Maintenance: Working together with matched proximitor sensor, it automatically detects probe open‑circuit, short‑circuit, excessive mounting‑gap, signal anomaly and loop‑impedance drift, and pinpoints fault locations. It lowers fault‑troubleshooting difficulty for concealed measuring‑points in narrow spaces and ensures stable commissioning of monitoring systems.
4. Specifications
Basic Parameters
Product Model: 330101‑00‑09‑10‑02‑CN Brand‑Manufacturer: Bently Nevada (Baker Hughes) Product Type: 3300 XL 8 mm Ultra‑short Unthreaded‑housing Eddy‑current Displacement Proximity Probe Applicable System: Bently Nevada 3300 XL‑series proximitor sensors and complete condition‑monitoring systems Compliance Standard: API 670 Industrial Standard for Rotating‑machinery Condition‑monitoring Model Definition: 330101 = Unthreaded short‑housing probe series; 00 = Non‑armored construction; 09 = 9 mm ultra‑short unthreaded housing length; 10 = 1.0 m original‑equipment cable; 02 = Mini ClickLoc connector; CN = Domestic‑compliant version
Core Electrical Performance Parameters
Rated Sensitivity: 7.87 V/mm (200 mV/mil) Standard Linear Range: 0～2 mm Measurement Accuracy: High full‑scale linearity, error ≤ ±0.1 % of reading, excellent data stability Frequency Response: 0～10 kHz, fully covering vibration‑frequency range during unit start‑stop and steady‑state‑operation, suitable for monitoring of units across full speed range Power Supply: ‑17.5 VDC～‑26 VDC DC power supplied by matched proximitor sensor Insulation Performance: High insulation‑impedance; full‑shielded structure prevents electric‑leakage and signal interference; zero‑attenuation transmission over 1‑meter short cable with precise and stable signal output
Structural Dimension Parameters
Probe Specification: 8 mm standard proximity probe, 9 mm ultra‑short unthreaded smooth‑bar compact housing structure Mounting Style: Unthreaded flush‑embedded mounting, suitable for smooth pre‑bored holes and fixed measuring‑points in shallow cavities Housing Length: 9 mm dedicated ultra‑short housing for extremely shallow, miniature and enclosed restricted installation spaces Cable Length: 1.0 m original‑equipment standard tri‑axial‑shielded flame‑retardant cable Connector Type: Mini ClickLoc self‑locking coaxial connector Structural Characteristics: Lightweight non‑armored construction, 304 stainless‑steel corrosion‑resistant anti‑aging housing, fully‑shielded flame‑retardant cable, anti‑signal‑crosstalk design, interference‑free mounting design Protection Grade: Industrial IP67, suitable for dust‑proof, water‑proof and oil‑proof harsh field conditions
Environmental Working Parameters
Probe Operating Temperature: ‑52 ℃～+177 ℃ Cable Operating Temperature: ‑52 ℃～+177 ℃ Storage Temperature: ‑40 ℃～+85 ℃ Operating Humidity: 5 %～95 %RH, non‑condensing Condition Resistance: Oil‑resistance, moisture‑resistance, dust‑resistance, corrosion‑resistance and aging‑resistance, industrial‑grade electromagnetic‑interference immunity, resistance to minor mechanical vibration
5. Application Scenarios
Bently Nevada 330101‑00‑09‑10‑02‑CN ultra‑short unthreaded probe is widely deployed in on‑line condition‑monitoring systems for large‑scale rotating‑machinery under conditions of shallow cavities, miniature pre‑bore measuring‑points, extremely compact enclosed spaces and interference‑free flush‑mounting across thermal‑power generation, gas‑power generation, petroleum‑refining, coal‑chemical industry, oil‑gas storage‑transportation and heavy‑metallurgy industries. It acts as exclusive core sensing hardware for narrow‑space restricted applications.
Typical application‑scenarios include: shaft vibration and displacement monitoring for shallow‑cavity miniature pre‑bored holes of steam‑turbine and gas‑turbine generator‑sets; data acquisition at flush‑mount confined enclosed end‑face measuring‑points on large centrifugal / screw compressors; condition monitoring at shallow‑slot compact measuring‑points on equipment bodies of large industrial fans and high‑pressure pumps; precise rotor‑eccentricity and thermal‑expansion‑difference monitoring inside miniature enclosed spaces; stable pickup of unit Keyphasor speed‑signals; system matching for condition‑monitoring of small‑size precision rotating‑machinery; replacement of aged legacy ultra‑short unthreaded probes; system upgrade and retrofits for concealed narrow measuring‑points; incipient micro‑fault diagnosis and accurate operating‑trend analysis for precision heavy‑duty rotating‑machinery.
As a dedicated ultra‑short‑housing variant within Bently Nevada 3300 XL series, it features 9 mm ultra‑compact footprint, interference‑free flush‑mount capability, maintenance‑free operation, high accuracy and high stability. It addresses key pain‑points including oversized conventional probes incompatible with shallow‑cavity miniature measuring‑points and mechanical interference with equipment operation. It accurately captures incipient minor latent faults of precision shaft‑systems, and delivers reliable data‑support for refined condition‑based maintenance, safety interlock‑protection and safe‑efficient unit operation. It serves as exclusive original‑equipment spare‑part for new‑installation, maintenance and retrofits of rotating‑equipment monitoring‑systems under industrial conditions of extremely compact and confined spaces.
