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- 330851-02-000-110-10-00-00
- 3300 XL 25mm Proximity Probe
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Technical Engineering Report
330851-02-000-110-10-00-00 Proximity Probe System
1. Product Overview
The model 330851-02-000-110-10-00-00 is an 8 mm eddy current proximity probe assembly designed for continuous monitoring of shaft vibration, axial displacement, and mechanical condition in rotating machinery.
It is used as part of a non-contact measurement system that detects changes in distance between the probe tip and a conductive target surface. The system converts these changes into a proportional electrical signal for condition monitoring and machinery protection purposes.
The “110” in the model code indicates a 11-meter cable configuration, making it suitable for large industrial installations where monitoring racks are located at a greater distance from the machine.
2. Brand and Product Series
- Brand: Industrial vibration monitoring instrumentation manufacturer
- Product family: 3300 XL 8 mm Proximity Transducer System
- Technology type: Eddy current displacement measurement system
- System composition: Probe + Extension cable + Signal driver
This product line is widely used in critical rotating equipment monitoring applications, offering long-term stability and high measurement precision.
3. Technical Parameters
3.1 Electrical Performance
- Measurement principle: Eddy current non-contact displacement sensing
- Output signal: Linear voltage proportional to shaft gap
- Sensitivity: ~7.87 mV/µm (typical 8 mm system value)
- Operating voltage range: -17 VDC to -24 VDC
- Frequency response: DC to several kHz vibration bandwidth
- Linear measurement range: ~2.0 mm
- Calibration: Factory matched probe-cable-driver system
3.2 Mechanical Structure
- Probe diameter: 8 mm
- Probe housing material: Stainless steel
- Cable length: 11 m (model segment “110”)
- Cable type: High-temperature coaxial shielded cable
- Connector type: Miniature coaxial industrial connector
- Mounting type: Threaded probe installation
- Environmental resistance: Oil, vibration, high temperature tolerant
3.3 Dimensions and Weight
| Item | Specification |
|---|---|
| Probe diameter | 8 mm |
| Probe length | ~100 mm |
| Cable length | 11 m |
| Total system length | ~11.2–11.8 m |
| Probe weight | 0.13 kg |
| Cable weight | 0.48 kg |
| System-level reference weight | 0.95 kg |
| Total assembled system weight | 0.61 kg |
4. Product Working Principle
The system operates using eddy current technology. When alternating current flows through the probe coil, it generates a high-frequency electromagnetic field.
When a conductive shaft enters this field, eddy currents are induced in the shaft surface, which alters the impedance of the probe coil. This change is converted into a voltage signal proportional to the distance between probe and target.
This allows continuous, real-time monitoring of mechanical movement without physical contact.
5. Application Areas
This model is commonly installed in high-value rotating machinery where operational stability is critical:
- Steam turbine generator systems
- Gas turbine monitoring units
- Large centrifugal compressors
- Refinery process pumps
- Petrochemical rotating equipment
- Marine propulsion shafts
- Heavy industrial gearboxes
- Power plant auxiliary machinery
It is widely used in predictive maintenance and machinery protection systems to prevent catastrophic failures.
6. Product Advantages
- High precision micro-displacement measurement capability
- Excellent long-term signal stability
- Strong resistance to electromagnetic interference
- Suitable for high temperature and harsh environments
- Modular design for flexible installation
- Reliable performance under continuous operation
- High linearity within measurement range
- Proven industrial-grade durability
7. Product Series Characteristics
This product belongs to the 8 mm proximity probe system platform, characterized by:
- Standard 8 mm probe geometry
- Modular probe-cable-driver architecture
- High interchangeability of components
- Designed for permanent installation on rotating machinery
- Long-term industrial reliability and stability
8. Recommended Models (Same Series or Closely Related)
Same Series Variants
| Model | Description | Key Parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 330851-02-000-050-10-00-00 | Short cable version | 8 mm probe, 5 m cable, general machinery monitoring | 8 mm × 95 mm | 0.24 |
| 330851-02-000-060-10-00-00 | Medium cable version | 8 mm probe, 6 m cable, compressor application | 8 mm × 98 mm | 0.26 |
| 330851-02-000-080-10-00-00 | Standard configuration | 8 mm probe, 8 m cable, industrial monitoring | 8 mm × 100 mm | 0.47 |
| 330851-02-000-100-10-00-00 | Long cable version | 8 mm probe, 10 m cable, turbine systems | 8 mm × 102 mm | 0.55 |
| 330851-02-000-120-10-00-00 | Extra long cable version | 8 mm probe, 12 m cable, heavy-duty installations | 8 mm × 105 mm | 0.66 |
9. Recommended Models (Same Brand Popular Units)
| Model | Description | Key Parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 330780-90-00 | Standard proximity probe | 8 mm vibration monitoring probe | 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 to monitoring output | 120 × 80 × 40 mm | 0.45 |
| 330100-90-00 | Proximitor driver unit | Signal amplification and conditioning module | 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 330851-02-000-110-10-00-00 proximity probe system is designed for long-distance installation scenarios requiring 11-meter cable routing between the probe and monitoring system.
It provides accurate, stable, and continuous measurement of shaft vibration and displacement in rotating machinery.
The system plays a key role in predictive maintenance strategies by detecting early mechanical abnormalities such as imbalance, misalignment, bearing wear, and shaft instability, reducing the risk of unexpected equipment shutdowns.