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- 330851-02-010-066-90-00-05
- 3300 XL 25mm Proximity Probe
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- 0.78kg
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Technical Engineering Report
330851-02-010-066-90-00-05 Proximity Probe System
1. Product Overview
The model 330851-02-010-066-90-00-05 is an 8 mm eddy current proximity probe system designed for high-precision monitoring of shaft vibration, axial displacement, and rotor dynamic behavior in rotating machinery.
It operates as a non-contact displacement measurement device, detecting changes in the gap between the probe tip and a conductive shaft surface and converting them into a proportional electrical signal.
The “010” typically indicates a 1.0 m probe/cable configuration segment within the assembly structure, while “066” represents a 6.6 m extension cable length, and “90-00-05” defines system calibration and configuration options.
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 architecture: Probe + Extension cable + Driver module
This product series is widely used in industrial machinery protection systems where continuous monitoring and high reliability are required.
3. Product Introduction
This probe system is designed for permanent installation on rotating machinery such as turbines, compressors, pumps, and generators.
It is part of a modular monitoring chain where the probe senses shaft motion, 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.
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 length segment: 1.0 m system configuration element
- Cable length: 6.6 m
- Cable type: Shielded high-temperature coaxial cable
- Connector type: Miniature industrial coaxial connector
- Installation type: Threaded probe mounting
- Environmental resistance: Oil, vibration, heat resistant
4.3 Dimensions and Weight
| Item | Specification |
|---|---|
| Probe diameter | 8 mm |
| Probe length | ~100 mm |
| Cable length | 6.6 m |
| Total system length | ~6.8–7.5 m |
| Probe weight | 0.12 kg |
| Cable weight | 0.32 kg |
| System reference weight | 0.78 kg |
| Total assembled system weight | 0.44 kg |
5. Product Function Description
The system uses 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, altering the impedance of the probe coil. This change is converted into a voltage signal proportional to the distance between probe and shaft.
This allows continuous monitoring of key mechanical conditions such as:
- Shaft radial vibration
- Axial displacement (thrust position)
- Rotor stability
- Long-term condition trend analysis
6. Application Areas
This model is widely applied in industrial rotating machinery systems:
- Steam turbine generator sets
- Gas turbine systems
- Centrifugal compressors
- Industrial pump systems
- Refinery rotating equipment
- Petrochemical processing units
- Marine propulsion systems
- Power generation auxiliary machinery
It is commonly integrated into predictive maintenance and protection systems.
7. Product Advantages
- High precision micro-displacement measurement capability
- Stable long-term signal performance
- Strong electromagnetic interference resistance
- Suitable for harsh industrial environments
- Modular structure for flexible installation
- Reliable continuous 24/7 operation
- High linearity across measurement range
- Proven durability in critical machinery 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) |
|---|---|---|---|---|
| 330851-02-010-050-90-00-05 | Short cable version | 8 mm probe, 5 m cable, compact setup | 8 mm × 95 mm | 0.24 |
| 330851-02-010-060-90-00-05 | Medium cable version | 8 mm probe, 6 m cable, compressor use | 8 mm × 98 mm | 0.26 |
| 330851-02-010-066-90-00-05 | Current model | 8 mm probe, 6.6 m cable, balanced configuration | 8 mm × 100 mm | 0.44 |
| 330851-02-010-080-90-00-05 | Standard version | 8 mm probe, 8 m cable, turbine application | 8 mm × 102 mm | 0.48 |
| 330851-02-010-100-90-00-05 | Long cable version | 8 mm probe, 10 m cable, heavy machinery | 8 mm × 105 mm | 0.58 |
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 330851-02-010-066-90-00-05 proximity probe system is designed for medium-length installation scenarios requiring a 6.6-meter cable configuration combined with a 1.0 m probe assembly structure element.
It provides stable, accurate, and continuous measurement of shaft vibration and displacement in rotating machinery, making it suitable for long-term 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 downtime and improve equipment reliability.