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- 330851-02-010-100-90-01-05
- 3300 XL 25mm Proximity Probe
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Technical Engineering Report
330851-02-010-100-90-01-05 Proximity Probe System
1. Product Overview
The model 330851-02-010-100-90-01-05 is an 8 mm eddy current proximity probe assembly designed for continuous monitoring of shaft vibration, axial displacement, and rotor dynamic behavior in rotating machinery.
It is a non-contact measurement system that converts the distance variation between the probe tip and a conductive shaft into a proportional electrical signal. This signal is used in machinery protection and condition monitoring systems for real-time diagnostics.
The “100” in the model designation typically represents a 10-meter cable configuration, while “010” indicates a probe/cable assembly structure element within the system coding.
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 sensing system
- System structure: Probe + Extension cable + Driver module
This series is widely applied in critical rotating machinery monitoring applications, especially in environments requiring long-term stability and high measurement accuracy.
3. Product Introduction
This probe system is designed for permanent installation on rotating machinery such as turbines, compressors, pumps, and generators.
It forms part of a complete vibration measurement chain where the probe senses shaft movement, the cable transmits the signal, and the driver converts it into a usable electrical 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 Characteristics
- Measurement principle: Eddy current non-contact displacement sensing
- Output signal: Linear voltage proportional to shaft gap
- Sensitivity: ~7.87 mV/µm (standard 8 mm system)
- Operating voltage: -17 VDC to -24 VDC
- Frequency response: DC to several kHz vibration range
- Linear measurement range: ~2.0 mm
- Calibration: Factory matched probe-cable-driver system
4.2 Mechanical Characteristics
- Probe diameter: 8 mm
- Probe material: Stainless steel housing
- Probe assembly segment: 1.0 m configuration element
- Cable length: 10 m
- Cable type: Shielded high-temperature coaxial cable
- Connector type: Miniature industrial coaxial connector
- 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 | 10 m |
| Total system length | ~10.2–10.9 m |
| Probe weight | 0.13 kg |
| Cable weight | 0.45 kg |
| System reference weight | 0.95 kg |
| Total assembled system weight | 0.58 kg |
5. Product Function Description
The system operates using eddy current sensing technology. A high-frequency electromagnetic field is generated at the probe tip.
When a conductive shaft approaches the probe, eddy currents are induced in the shaft surface, changing the impedance of the probe coil. This change is converted into a voltage signal proportional to the distance between probe and shaft.
This enables continuous monitoring of key mechanical conditions such as:
- Shaft radial vibration
- Axial displacement (thrust position)
- Rotor stability condition
- Long-term trend analysis of machine health
6. Application Areas
This model is widely used in industrial rotating machinery monitoring systems:
- Steam turbine generator units
- Gas turbine systems
- Centrifugal compressors
- Industrial pump systems
- Petrochemical processing equipment
- Refinery rotating machinery
- Marine propulsion shafts
- Power generation auxiliary systems
It is commonly integrated into predictive maintenance and machinery protection systems.
7. Product Advantages
- High precision micro-displacement measurement capability
- Stable long-term signal output performance
- Strong resistance to electromagnetic interference
- Suitable for harsh industrial environments
- Modular design for flexible installation
- Reliable continuous 24/7 operation capability
- High linearity across measurement range
- Proven durability in mission-critical applications
8. Product Series Overview
This model belongs to the 8 mm eddy current proximity probe system family, characterized by:
- Standard 8 mm probe geometry
- Modular probe-cable-driver architecture
- High interchangeability between components
- Designed for permanent industrial installation
- Widely used in rotating machinery monitoring systems
9. Recommended Models (Same Series or Closely Related)
Same Series Variants
| Model | Description | Key Parameters | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 330851-02-010-050-90-01-05 | Short cable version | 8 mm probe, 5 m cable, compact installation | 8 mm × 95 mm | 0.24 |
| 330851-02-010-060-90-01-05 | Medium cable version | 8 mm probe, 6 m cable, compressor use | 8 mm × 98 mm | 0.26 |
| 330851-02-010-080-90-01-05 | Standard version | 8 mm probe, 8 m cable, turbine systems | 8 mm × 100 mm | 0.48 |
| 330851-02-010-100-90-01-05 | Current model | 8 mm probe, 10 m cable, long-distance installation | 8 mm × 105 mm | 0.58 |
| 330851-02-010-120-90-01-05 | Extra long version | 8 mm probe, 12 m cable, heavy-duty systems | 8 mm × 108 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 measurement 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 output | 120 × 80 × 40 mm | 0.45 |
| 330100-90-00 | Driver module | Signal amplification and conditioning | 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 330851-02-010-100-90-01-05 proximity probe system is designed for long-distance installation scenarios requiring a 10-meter cable configuration combined with a modular probe assembly structure.
It provides stable, accurate, and continuous measurement of shaft vibration and displacement in rotating machinery, making it suitable for demanding industrial monitoring applications.
The system is widely used in predictive maintenance strategies to detect early mechanical faults such as imbalance, misalignment, bearing wear, and rotor instability, helping reduce unplanned downtime and improve overall equipment reliability.