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Technical Engineering Report
330851-02-000-110-10-00-CN Proximity Probe System
1. Product Overview
The model 330851-02-000-110-10-00-CN is an 8 mm eddy current proximity probe system designed for precise, continuous monitoring of shaft vibration and axial displacement in rotating machinery.
It is a non-contact measurement device that converts changes in distance between the probe tip and a conductive target surface into a proportional electrical signal. This signal is used for real-time condition monitoring, protection logic, and predictive maintenance analysis.
The “110” in the model code indicates an 11-meter cable configuration, while the “CN” suffix refers to a configuration or regional variant within the same engineering platform.
2. Brand and Product Series
- Brand: Industrial machinery condition monitoring instrumentation manufacturer
- Product family: 3300 XL 8 mm Proximity Transducer System
- Technology: Eddy current displacement measurement
- System structure: Probe + Extension cable + Driver module
This product family is widely used in critical rotating equipment where continuous monitoring and high reliability are required.
3. Product Introduction
This probe system is designed for long-term installation on rotating machinery such as turbines, compressors, and large pumps.
It is part of a modular vibration monitoring architecture where the probe measures shaft movement, the cable transmits the signal, and the driver converts it into a usable output for monitoring systems.
The system is engineered for harsh industrial environments, including high temperature, vibration, oil exposure, and electromagnetic interference conditions.
4. Technical Parameters
4.1 Electrical Parameters
- Measurement principle: Eddy current non-contact displacement sensing
- Output signal: Linear voltage proportional to gap distance
- Sensitivity: ~7.87 mV/µm (standard 8 mm system)
- Operating voltage: -17 VDC to -24 VDC
- Frequency response: DC to several kHz range
- Linear range: ~2.0 mm effective measurement range
- System calibration: Factory matched probe-cable-driver
4.2 Mechanical Parameters
- Probe diameter: 8 mm
- Probe material: Stainless steel housing
- Cable length: 11 m
- Cable type: Shielded high-temperature coaxial cable
- Connector type: Miniature coaxial connector system
- Installation type: Threaded probe mounting
- Environmental resistance: Oil, vibration, and heat resistant
4.3 Dimensions and Weight
| Item | Specification |
|---|---|
| Probe diameter | 8 mm |
| Probe length | ~100 mm |
| Cable length | 11 m |
| Total system length | ~11.2–11.9 m |
| Probe weight | 0.13 kg |
| Cable weight | 0.48 kg |
| Driver compatibility reference weight | 0.90 kg |
| Total system assembled weight | 0.61 kg |
5. Product Function Description
The system works by generating a high-frequency electromagnetic field at the probe tip. When a conductive shaft enters this field, eddy currents are induced on the shaft surface, changing the impedance of the probe coil.
This change is converted into a voltage signal proportional to the distance between the probe and the shaft.
It enables continuous monitoring of:
- Shaft vibration
- Axial displacement
- Rotor position (thrust measurement)
- Mechanical condition trends
6. Application Areas
This model is widely applied in industrial rotating machinery systems where reliability is critical:
- Steam turbine generator sets
- Gas turbine systems
- Centrifugal compressors
- Oil refinery pump systems
- Petrochemical processing equipment
- Marine propulsion shafts
- Industrial gearboxes
- Power generation auxiliary machinery
It is commonly integrated into predictive maintenance and machinery protection systems.
7. Product Advantages
- High precision measurement of micro-displacement
- Stable long-term signal performance
- Strong resistance to electromagnetic interference
- Suitable for high temperature industrial environments
- Modular architecture for flexible installation
- Reliable continuous 24/7 operation capability
- High linearity across measurement range
- Proven durability in harsh industrial conditions
8. Product Series Overview
This model belongs to the 8 mm eddy current proximity probe system family, characterized by:
- Standard 8 mm probe diameter
- Modular probe-cable-driver structure
- High interchangeability of components
- Designed for permanent industrial installation
- Suitable for long-term machinery monitoring systems
9. 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, general machinery monitoring | 8 mm × 95 mm | 0.24 |
| 330851-02-000-060-10-00-CN | Medium cable version | 8 mm probe, 6 m cable, compressor application | 8 mm × 98 mm | 0.26 |
| 330851-02-000-080-10-00-CN | Standard configuration | 8 mm probe, 8 m cable, industrial monitoring | 8 mm × 100 mm | 0.47 |
| 330851-02-000-100-10-00-CN | Long cable version | 8 mm probe, 10 m cable, turbine systems | 8 mm × 102 mm | 0.55 |
| 330851-02-000-120-10-00-CN | Extra long cable version | 8 mm probe, 12 m cable, heavy-duty installations | 8 mm × 105 mm | 0.66 |
10. 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 | Improved 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 | Driver unit | Signal amplification and conditioning module | 150 × 100 × 50 mm | 0.82 |
| 3500/42M | Monitoring module | Multi-channel machinery protection system | 220 × 130 × 60 mm | 1.25 |
11. Engineering Summary
The 330851-02-000-110-10-00-CN probe system is designed for long-distance installation scenarios requiring extended cable routing between measurement point and monitoring equipment.
It provides accurate, stable, and continuous measurement of shaft vibration and displacement in rotating machinery, making it suitable for mission-critical industrial applications.
The system is widely used in predictive maintenance strategies to detect early-stage mechanical issues such as imbalance, misalignment, bearing wear, and rotor instability, helping prevent unplanned downtime and equipment failure.