Description
Bently Nevada 330103-00-02-10-02-05
I. Basic Information
Model: 330103-00-02-10-02-05
Brand: Bently Nevada
Supported Platform: 3300 XL 8mm eddy current sensor system, compatible with 3500 series TSI machinery protection framework.Product Type: Compact 8mm standard non-contact eddy current proximity probe, used for radial vibration, axial displacement, key phase and rotating speed measurement of rotating equipment. It forms a complete measuring system together with matched extension cable and proximitor, widely applied in predictive maintenance and safety interlock protection of large rotating machinery in power, petrochemical and metallurgical industries, especially suitable for measuring points with limited installation space.
Model Code Explanation
330103: 3300 XL 8mm series probe with M10×1 metric thread and non-armored cable00: Unthreaded length 0mm02: Total probe housing length 20mm (compact short housing)10: Integral built-in cable length 1.0m02: ClickLoc miniature coaxial quick-lock connector with double shielded standard cable05: Certified version for hazardous explosive area applications
Product Positioning
Complying with API 670 standard, this compact short-housing 3300 XL proximity probe features excellent linearity, temperature stability and EMC anti-interference performance, specially designed for bearing housings with narrow installation space. Interchangeable with same-series extension cables and proximitors without additional calibration, the stainless steel hermetically sealed housing and high-temperature resistant PPS tip enable stable long-term operation under harsh on-site conditions including high temperature, oil contamination, dust and strong electromagnetic interference. It captures dynamic vibration and static displacement signals to realize early fault warning of shaft unbalance, bearing wear and axial collision, serving as the core front-end sensing device of machinery safety monitoring system for compact equipment measuring points.
Hardware Architecture
Consisting of four core units: high-frequency induction coil detecting unit, high-temperature sealed protection unit, double-shielded signal transmission unit and factory calibrated impedance matching unit. The high-frequency alternating magnetic field generated by the internal coil induces eddy current on the measured metal target surface, converting clearance variation into linear DC voltage signal for high-precision non-contact displacement measurement. The compact short housing structure solves the installation limitation of narrow bearing holes.
Mounting & Supporting System
- Mounting Method: M10×1 threaded installation with lock nut; recommended initial gap 1.27mm (-9VDC output); avoid excessive tightening to prevent tip damage
- Minimum Cable Bending Radius: 8 times of cable outer diameter
- System Matching Rule: Total length of probe cable plus extension cable must be consistent with rated length of proximitor (5m/9m system cannot be mixed)
- Supporting Devices: 3300 XL proximitor, matched extension cable, TK-3 calibration tool, 3500 monitoring rack
- Typical Industries: Thermal power plants, petrochemical compressor stations, metallurgical fan equipment, large pump units with limited installation space
Product Features
- Compact 20mm short housing with 0mm unthreaded section, perfectly applicable to narrow bearing seat installation scenarios where conventional probes cannot be assembled.
- High linear measurement accuracy with 2mm effective range, standard sensitivity 7.87V/mm, suitable for both static displacement and high-frequency dynamic vibration acquisition.
- Built-in temperature compensation structure suppresses thermal drift, ensuring stable measuring performance within wide operating temperature range.
- IP67 protection plus explosion-proof certification allows safe deployment in hazardous industrial areas.
- Same-series components are interchangeable without laboratory recalibration, greatly shortening on-site maintenance downtime.
- Double-shielded coaxial cable and locking coaxial connector effectively resist strong on-site electromagnetic interference to avoid abnormal signal fluctuation and false protection.
- Non-contact measuring mode eliminates mechanical wear, supporting 24/7 long-term continuous monitoring with low maintenance cost.
II. Technical Specifications
2.1 Electrical Parameters
- Sensor Type: 3300 XL 8mm 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: 7.45±0.5Ω
- Proximitor Power Supply: -17.5～-26VDC, Max. Operating Current 12mA
- Linearity Deviation: ≤±38μm
2.2 Mechanical Parameters
- Mount Thread: M10×1mm metric external thread
- Unthreaded Length: 0mm; Total Housing Length: 20mm
- Built-in Cable Length: 1.0m, non-armored double shielded
- 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: -35℃ ~ +125℃
- Storage Temperature: -40℃ ~ +150℃
- Operating Humidity: 5%～95%RH (non-condensing)
- Compliance Standard: API 670 4th Edition, explosion-proof certification for hazardous areas
- MTBF: ≥280000 Hours
2.4 Physical Parameters
- Mounting Mode: Threaded fixed installation with anti-loose lock nut, forbid over-tightening
- Net Weight: 220g
- Sealing Structure: Viton O-ring full hermetic sealing
III. Key Features
- Real-time radial vibration monitoring for rotating shafts in narrow installation spaces to realize early warning of rotor unbalance, misalignment and bearing faults.
- Accurate axial displacement and differential expansion measurement to prevent axial friction and collision of turbine and compressor units.
- Key phase signal acquisition for rotating speed calculation, vibration spectrum analysis and dynamic balance correction of rotating equipment.
- Built-in temperature compensation ensures stable measuring output under high-temperature bearing housing operating conditions.
- Explosion-proof certification meets electrical safety requirements for flammable and explosive process plants.
- Standardized mechanical and electrical interfaces support rapid on-site spare part replacement with only gap calibration required before commissioning.
IV. Working Principle
The proximitor outputs high-frequency alternating excitation current to the internal coil of the probe, forming an alternating magnetic field which induces eddy current on the metal target surface. The equivalent impedance of the coil changes linearly with the clearance between probe tip and measured surface. The proximitor converts impedance variation into linear negative DC voltage signal and transmits it to the 3500 monitoring module. Vibration and axial displacement will cause real-time clearance change and voltage fluctuation, which is converted into physical displacement parameters for data trending, threshold alarm and safety interlock. With factory impedance and sensitivity calibration, double-shielded cable and hermetic sealing design, the sensor maintains stable measuring performance against temperature change, oil contamination and electromagnetic interference, especially adapting to compact narrow measuring points.
V. Application Scenarios
- TSI safety monitoring for thermal and gas turbine generator units with narrow bearing installation positions, including shaft vibration, axial displacement, rotating speed and key phase protection.
- Vibration and displacement online monitoring for petrochemical centrifugal compressors and expanders to realize surge and bearing fault early warning.
- Condition monitoring for metallurgical large fans with limited mounting space to avoid catastrophic blade and bearing failures.
- Predictive maintenance of large water pumps and turbo power equipment to reduce unplanned shutdown risk.
- Technical renovation and in-situ spare part replacement of monitoring probes in hazardous explosive process facilities for narrow measuring points.
