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- 3300 XL 25mm Proximity Probe
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Technical Engineering Report
330851-02-000-100-10-00-CN Proximity Probe System
1. Product Overview
The model 330851-02-000-100-10-00-CN is an 8 mm eddy current proximity probe assembly designed for precision measurement of shaft vibration and axial displacement in rotating machinery.
It is part of a modular condition monitoring system used to continuously track mechanical behavior in critical industrial assets. The system converts physical displacement into an electrical signal, enabling real-time monitoring of machine health.
This configuration with “100” indicates a 10-meter cable length, while the “CN” suffix generally denotes a regional or configuration-specific variant within the same engineering platform.
2. Brand and Product Series
- Brand: Industrial vibration monitoring instrumentation manufacturer
- Product family: 3300 XL 8 mm Proximity Transducer System
- Technology: Eddy current displacement sensing
- System architecture: Probe + Extension cable + Signal driver
This product family is widely used in industrial machinery protection systems and is known for long-term operational stability in harsh environments.
3. Technical Parameters
3.1 Electrical Characteristics
- Measurement principle: Eddy current non-contact displacement sensing
- Output signal: Linear voltage proportional to shaft distance
- Sensitivity: Approx. 7.87 mV/µm (standard 8 mm system)
- Operating voltage: -17 VDC to -24 VDC
- Frequency response: DC to several kHz vibration range
- Linear range: ~2.0 mm effective measurement range
- Calibration: Factory matched system components
3.2 Mechanical Characteristics
- Probe diameter: 8 mm
- Probe housing material: Stainless steel
- Cable length: 10 m (model segment “100”)
- Cable type: High-temperature coaxial cable
- Connector type: Miniature coaxial industrial connector
- Installation: Threaded probe mounting system
- Environmental resistance: High temperature, oil, and vibration resistant
3.3 Dimensions and Weight
| Item | Specification |
|---|---|
| Probe diameter | 8 mm |
| Probe length | ~100 mm |
| Cable length | 10 m |
| Total system length | ~10.2–10.8 m |
| Probe weight | 0.13 kg |
| Cable weight | 0.42 kg |
| Driver compatibility weight (system level reference) | 0.90 kg |
| Total assembled system weight | 0.55 kg |
4. Product Functional Description
The system operates by generating a high-frequency electromagnetic field at the probe tip. When placed near a conductive shaft, the field is disturbed by changes in distance, producing a measurable voltage output.
This output is directly proportional to the gap between the probe and the shaft surface, allowing precise monitoring of mechanical motion.
Key measurement functions include:
- Radial vibration monitoring
- Shaft axial displacement detection
- Thrust position measurement
- Machine condition trend analysis
- Early fault detection in rotating equipment
5. Application Areas
This model is widely used in high-value rotating machinery systems where continuous monitoring is essential:
- Steam turbine generator units
- Gas turbine assemblies
- Large centrifugal compressors
- Petrochemical process pumps
- Refinery rotating equipment
- Marine propulsion systems
- Industrial gearboxes
- Power plant auxiliary machinery
It is typically integrated into predictive maintenance and machinery protection systems.
6. Product Advantages
- High-resolution measurement of micro-displacement
- Stable performance under high temperature and vibration environments
- Excellent long-term drift stability
- Strong electromagnetic interference resistance
- Modular structure allows flexible installation
- Suitable for continuous 24/7 monitoring systems
- High reliability in critical machinery applications
- Compatible with industrial protection systems
7. Product Series Overview
This model belongs to the 8 mm eddy current proximity probe system family, characterized by:
- Standard probe diameter of 8 mm
- Modular architecture (probe + cable + driver)
- High interchangeability between system components
- Designed for permanent installation on rotating machinery
- Industrial-grade robustness for harsh environments
8. Recommended Models (Same Series or Closely Related)
Same Series Variants
| Model | Description | Key Parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 330851-02-000-050-10-00-CN | Short cable version | 8 mm probe, 5 m cable, vibration monitoring | 8 mm × 95 mm | 0.24 |
| 330851-02-000-060-10-00-CN | Medium cable version | 8 mm probe, 6 m cable, compressor use | 8 mm × 98 mm | 0.26 |
| 330851-02-000-080-10-00-CN | Standard configuration | 8 mm probe, 8 m cable, general machinery | 8 mm × 100 mm | 0.47 |
| 330851-02-000-090-10-00-CN | Extended cable type | 8 mm probe, 9 m cable, turbine systems | 8 mm × 102 mm | 0.52 |
| 330851-02-000-110-10-00-CN | Extra long cable version | 8 mm probe, 11 m cable, heavy-duty use | 8 mm × 105 mm | 0.60 |
9. Recommended Models (Same Brand Popular Units)
| Model | Description | Key Parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 330780-90-00 | Standard proximity probe | 8 mm vibration measurement system | 8 mm × 100 mm | 0.18 |
| 330400-02-00 | High temperature probe | Enhanced thermal resistance design | 8 mm × 102 mm | 0.21 |
| 330180-50-00 | Signal conditioning module | Converts probe signal into monitoring output | 120 × 80 × 40 mm | 0.45 |
| 330100-90-00 | Proximitor driver unit | Signal amplification and conditioning | 150 × 100 × 50 mm | 0.82 |
| 3500/42M | Vibration monitoring module | Multi-channel machinery protection system | 220 × 130 × 60 mm | 1.25 |
10. Engineering Summary
The 330851-02-000-100-10-00-CN proximity probe system is designed for precise and stable measurement of shaft vibration and displacement in rotating machinery.
Its long cable configuration makes it suitable for large industrial installations where distance between sensor and monitoring system is significant.
The system is widely used in predictive maintenance strategies to detect early signs of mechanical issues such as imbalance, misalignment, bearing wear, and shaft instability, helping prevent unexpected equipment failure.