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- 330851-02-00-066-10-00-05
- 3300 XL 25mm Proximity Probe
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Technical Engineering Report
330851-02-00-066-10-00-05 Proximity Probe System
1. Product Overview
The model 330851-02-00-066-10-00-05 is an 8 mm eddy current proximity probe system designed for high-precision measurement of shaft vibration, axial displacement, and rotor dynamic behavior in rotating machinery.
It is a non-contact sensing solution that converts the distance variation between the probe tip and a conductive shaft into a proportional electrical signal. This enables continuous monitoring of machine condition in real time.
The “066” in the model code typically represents a 6.6-meter cable configuration, offering a balance between installation flexibility and signal transmission stability in medium-distance monitoring layouts.
2. Brand and Product Series
- Brand: Industrial vibration monitoring instrumentation manufacturer
- Product family: 3300 XL 8 mm Proximity Transducer System
- Technology: Eddy current displacement measurement system
- Architecture: Probe + Extension cable + Signal driver
This product family is widely used in industrial condition monitoring systems, especially in critical rotating equipment requiring continuous protection.
3. Product Introduction
This probe system is designed for permanent installation on rotating machinery such as turbines, compressors, and pumps.
It is part of a modular measurement chain where the probe detects shaft movement, the cable transmits the signal, and the driver converts it into usable output for monitoring systems.
The system is engineered for harsh environments including high temperature, vibration, oil contamination, 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 range
- Linear range: ~2.0 mm effective measurement range
- System calibration: Factory matched probe-cable-driver assembly
4.2 Mechanical Characteristics
- Probe diameter: 8 mm
- Probe material: Stainless steel housing
- Cable length: 6.6 m
- Cable type: Shielded high-temperature coaxial cable
- Connector type: Miniature industrial coaxial connector
- Mounting type: Threaded probe installation
- Environmental resistance: Oil, heat, vibration resistant
4.3 Dimensions and Weight
| Item | Specification |
|---|---|
| Probe diameter | 8 mm |
| Probe length | ~100 mm |
| Cable length | 6.6 m |
| Total system length | ~6.8–7.2 m |
| Probe weight | 0.12 kg |
| Cable weight | 0.31 kg |
| System reference weight | 0.75 kg |
| Total assembled system weight | 0.43 kg |
5. Product Function Description
The system operates using eddy current induction principles. The probe generates a high-frequency electromagnetic field at its 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 gap distance.
This allows continuous monitoring of:
- Shaft radial vibration
- Axial displacement (thrust position)
- Rotor stability condition
- Mechanical condition trends
6. Application Areas
This model is widely used in industrial rotating equipment monitoring systems where reliability is critical:
- Steam turbine generator sets
- Gas turbine systems
- Centrifugal compressors
- Industrial pump systems
- Petrochemical processing equipment
- Refinery rotating machinery
- Marine propulsion shafts
- Power plant auxiliary systems
It is commonly integrated into predictive maintenance and protection systems.
7. Product Advantages
- High precision micro-displacement measurement capability
- Stable long-term signal output
- Strong electromagnetic interference resistance
- Suitable for harsh industrial environments
- Modular structure for flexible installation
- Reliable continuous 24/7 operation
- High linearity across operating range
- Proven durability in 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) |
|---|---|---|---|---|
| 330851-02-00-050-10-00-05 | Short cable version | 8 mm probe, 5 m cable, general monitoring | 8 mm × 95 mm | 0.24 |
| 330851-02-00-060-10-00-05 | Medium cable version | 8 mm probe, 6 m cable, compressor use | 8 mm × 98 mm | 0.26 |
| 330851-02-00-066-10-00-05 | Current model | 8 mm probe, 6.6 m cable, balanced installation | 8 mm × 100 mm | 0.43 |
| 330851-02-00-080-10-00-05 | Standard version | 8 mm probe, 8 m cable, turbine systems | 8 mm × 102 mm | 0.47 |
| 330851-02-00-100-10-00-05 | 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 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 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 330851-02-00-066-10-00-05 proximity probe system is designed for medium-length installation scenarios requiring approximately 6.6 meters of cable routing between sensor and monitoring equipment.
It provides stable, accurate, and continuous measurement of shaft vibration and displacement, making it suitable for long-term industrial condition 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 to prevent unexpected downtime and equipment damage.