Description
Bently Nevada 330101-00-28-10-02-05
I. Basic Information
Model: 330101-00-28-10-02-05
Brand: Bently Nevada
Supported Platform: 3300 XL 8mm non-armored eddy current proximity sensor system, compatible with 3500 series TSI machinery protection rack.Product Type: Long-housing non-armored 8mm non-contact eddy current proximity probe with 3/8-24 UNF imperial mounting thread, applied for radial vibration, axial displacement, key phase and rotating speed measurement of critical rotating equipment. Matched with dedicated non-armored extension cable and proximitor, the flexible double-shielded cable enables convenient wiring in deep bearing housings and densely arranged pipelines. Certified by ATEX, IECEx and CSA intrinsic safety standards, it can be safely deployed in Zone 1 and Zone 2 hazardous explosive industrial facilities for machinery safety protection and predictive maintenance in power, petrochemical and metallurgical industries.
Model Code Explanation
330101: 3300 XL 8mm series proximity probe, 3/8-24 UNF imperial thread, non-armored double-shielded flexible cable structure
00: Unthreaded length 0mm
28: Total probe housing length 2.8 inch
10: Integral built-in cable length 1.0m
02: ClickLoc miniature coaxial quick-lock connector with double inner shielded standard oil-resistant cable
05: Certified with ATEX, IECEx, CSA intrinsic safety approval for hazardous explosive area applications
Product Positioning
Compliant with API 670 4th industrial standard, this long-housing non-armored proximity probe is specially optimized for deep bearing housings and measuring points with peripheral mounting interferences. Equipped with high-temperature resistant PPS tip and hermetically sealed 304 stainless steel housing, it operates reliably from -51℃ to +177℃ with built-in temperature compensation to eliminate thermal drift. Same-series probes, extension cables and proximitors are fully interchangeable without laboratory recalibration. With flexible routing performance and multi-national explosion-proof certifications, it serves as the core front-end sensing device for TSI monitoring systems of turbines, compressors and fans in petrochemical and coal chemical hazardous process plants, capturing early mechanical faults to prevent unplanned shutdowns and catastrophic safety accidents.
Hardware Architecture
The sensor adopts integrated hermetic sealing design, consisting of four core functional modules: high-frequency induction coil detection unit, wide-temperature sealed protection unit, double-shielded flexible signal transmission unit and factory calibrated impedance matching unit. The alternating magnetic field generated by internal coil induces eddy current on ferromagnetic target surface, converting clearance variation into linear DC voltage signal for high-precision non-contact static and dynamic parameter measurement. The 2.8-inch long housing avoids mechanical interference from peripheral pipelines and brackets, while flexible double-shielded cable balances anti-electromagnetic interference performance and construction convenience for densely wired deep installation sites.
Mounting & Supporting System
- Mounting Method: 3/8-24 UNF threaded installation with anti-loose lock nut; recommended initial installation gap 1.27mm (-9VDC output)
- Minimum Cable Bending Radius: 8 times of cable outer diameter; sharp bending, squeezing and dragging are prohibited to avoid shielding damage
- System Matching Rule: Total length of probe cable plus extension cable must match the rated length of matched proximitor; 5m and 9m systems cannot be mixed
- Supporting Devices: 3300 XL non-armored proximitor, matched extension cable, TK-3 gap calibrator, 3500 monitoring rack, explosion-proof cable glands
- Typical Application Industries: Thermal power plants, petrochemical hazardous process facilities, metallurgical heavy fan units, oil & gas pump sets with deep bearing housings, dense wiring and explosive hazard risks.
Product Features
- 2.8-inch long housing design effectively avoids mounting interference from peripheral pipelines, brackets and temperature sensors, adapting to deep bearing seat installation scenarios unavailable for short probes.
- Flexible non-armored double-shielded cable realizes convenient routing in narrow cable trays and densely arranged pipelines, greatly reducing field wiring construction difficulty and ensuring strong EMI/RFI suppression.
- High linear measurement accuracy with 2mm effective span and standard sensitivity of 7.87V/mm, supporting synchronous acquisition of static differential expansion and high-frequency dynamic vibration signals with excellent repeatability.
- Ultra-wide operating temperature range from -51℃ to +177℃ with built-in temperature compensation to restrain zero drift and sensitivity attenuation under extreme ambient temperature.
- IP67 hermetic sealing plus ATEX/IECEx/CSA intrinsic safety certifications guarantee compliant installation in Zone 1 & Zone 2 flammable and explosive industrial areas with complete official certification documents for project safety acceptance.
- Full interchangeability of same-series sensor components requires only gap calibration after spare part replacement, effectively shortening equipment maintenance downtime.
- Non-contact measuring mode eliminates mechanical abrasion, supporting 24/7 long-term continuous online condition monitoring with low whole-life maintenance cost.
II. Technical Specifications
2.1 Electrical Parameters
- Sensor Type: 3300 XL 8mm non-armored eddy current proximity probe
- Nominal Sensitivity: 7.87 V/mm (±6.5% tolerance)
- Linear Measuring Range: 0.25mm ~ 2.3mm, effective linear span 2mm
- Recommended Install Gap: 1.27mm, corresponding output voltage -9VDC
- Frequency Response: 0～8kHz
- Probe DC Resistance: 7.59±0.5Ω
- Proximitor Power Supply: -17.5～-26VDC, Max. Operating Current 12mA
- Linearity Deviation: ≤±38μm
2.2 Mechanical Parameters
- Mount Thread: 3/8-24 UNF imperial external thread
- Unthreaded Length: 0mm; Total Housing Length: 2.8 inch
- Built-in Cable Length: 1.0m, double inner shielded oil-resistant non-armored cable
- Connector Type: ClickLoc miniature coaxial quick-lock connector
- Tip Material: High-temperature resistant PPS; Housing Material: 304 stainless steel
- Ingress Protection Rating: IP67
2.3 Environmental Specifications
- Operating Temperature: -51℃ ~ +177℃
- Storage Temperature: -40℃ ~ +177℃
- Operating Humidity: 5%～95%RH (non-condensing)
- Certification: ATEX, IECEx, CSA intrinsic safety explosion-proof certification
- Vibration Compliance: IEC 60068-2-6
- Compliance Standard: API 670 4th Edition
- MTBF: ≥280000 Hours
2.4 Physical Parameters
- Mounting Mode: Threaded fixed installation with anti-loose lock nut and gasket
- Net Weight: 212g
- Sealing Structure: Viton O-ring full hermetic sealing
III. Key Features
- Real-time radial vibration monitoring for rotating machinery in deep bearing housings and hazardous explosive sites with mounting interferences, realizing early fault warning of rotor unbalance, misalignment and bearing failure to guarantee host equipment safety.
- High-precision axial displacement and differential expansion measurement prevents axial friction and collision of turbine and compressor units in explosion-risk process plants.
- Key phase pulse signal acquisition supports rotating speed calculation, vibration spectrum analysis and dynamic balance correction for precise predictive maintenance of heavy rotating equipment.
- Built-in wide-temperature compensation ensures stable measuring performance for both high-temperature deep bearing housings and low-temperature outdoor explosion-proof installations.
- Multi-standard intrinsic safety certifications fully meet electrical regulatory requirements of flammable and explosive petrochemical facilities with complete official certification documents for project safety acceptance.
- Standardized mechanical and electrical interfaces enable direct in-situ spare part replacement, only gap calibration is required before commissioning without modifying field wiring and control system configuration.
IV. Working Principle
The proximitor outputs high-frequency alternating excitation current to the internal coil of the probe, generating alternating magnetic field which induces closed eddy current loop on the surface of AISI 4140 ferromagnetic target. The equivalent impedance of the coil changes linearly with the clearance between probe tip and metal surface, and the proximitor converts impedance variation into standardized negative DC voltage signal transmitted to the 3500 monitoring rack. Vibration and axial displacement cause real-time clearance fluctuation and voltage variation, which is converted into physical displacement parameters for data trending, threshold alarm and safety interlock. When used as a keyphasor probe, the rotor keyway triggers instantaneous eddy current mutation to generate pulse signals for rotating speed and phase analysis. With factory precise calibration, long interference-resistant housing design, double-shielded flexible wiring, IP67 sealing and international explosion-proof certifications, the sensor delivers long-term stable, accurate and compliant measurement signals for TSI machinery protection systems in hazardous industrial facilities with deep installation requirements.
V. Application Scenarios
- TSI safety monitoring for thermal and gas turbine generator units, covering shaft vibration, axial displacement, rotating speed and key phase measurement of deep bearing housings with peripheral pipeline and bracket interferences.
- Online condition monitoring for centrifugal compressors, expanders and pump sets in petrochemical and coal chemical Zone 1/2 hazardous process plants to realize surge and bearing fault early warning and avoid unplanned plant shutdown and explosion accidents.
- Bearing vibration protection for metallurgical blast furnace fans and sintering auxiliary equipment under deep installation, dusty and oily operating conditions.
- Predictive maintenance for oil & gas transfer pump sets with limited wiring space and deep measuring locations, ensuring stable measurement under complex electromagnetic interference via double-shielded cable structure.
- Technical renovation and in-situ replacement of old non-armored proximity probes with mounting interference problems in explosion-risk industrial sites, reusing existing proximitors, extension cables and 3500 configuration programs with complete explosion-proof certification documents to pass project safety acceptance and reduce retrofit costs.
