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- 330851-02-00-060-50-00-05
- 3300 XL 25mm Proximity Probe
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Technical Engineering Report
330851-02-00-060-50-00-05 Proximity Probe System
1. Product Overview
The model 330851-02-00-060-50-00-05 is an 8 mm eddy current proximity probe assembly designed for precise measurement of shaft vibration, axial displacement, and rotor position in rotating machinery.
It is a non-contact sensing system that detects changes in the gap between the probe tip and a conductive shaft surface, converting mechanical movement into a proportional electrical signal for monitoring and protection systems.
The “060” in the model number typically represents a 6-meter cable configuration, making this version suitable for medium-distance installation between machine and monitoring rack.
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 architecture: Probe + Extension cable + Driver module
This product series is widely applied in industrial machinery condition monitoring and is known for stable long-term performance in harsh operating environments.
3. Product Introduction
This model is part of a modular vibration monitoring system used in rotating equipment such as turbines, compressors, and pumps.
It provides continuous real-time monitoring of shaft behavior, enabling early detection of mechanical abnormalities such as imbalance, misalignment, and bearing wear.
The system consists of a probe installed near the shaft, a cable for signal transmission, and a driver unit that processes and outputs the measurement signal.
4. Technical Parameters
4.1 Electrical Characteristics
- Measurement principle: Eddy current non-contact displacement sensing
- Output signal: Linear voltage proportional to shaft distance
- 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
- Cable length: 6 m
- Cable type: Shielded high-temperature coaxial cable
- Connector type: Miniature coaxial connector system
- Installation type: Threaded mounting design
- Environmental resistance: Oil, heat, and vibration resistant
4.3 Dimensions and Weight
| Item | Specification |
|---|---|
| Probe diameter | 8 mm |
| Probe length | ~100 mm |
| Cable length | 6 m |
| Total system length | ~6.2–6.8 m |
| Probe weight | 0.12 kg |
| Cable weight | 0.28 kg |
| System reference weight | 0.70 kg |
| Total assembled system weight | 0.40 kg |
5. Product Function Description
The system operates using eddy current technology. When alternating current is applied to the probe coil, it generates an 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 probe and shaft.
It enables continuous monitoring of:
- Shaft radial vibration
- Axial displacement (thrust position)
- Rotor stability condition
- Mechanical condition trends over time
6. Application Areas
This model is widely used in industrial rotating machinery where reliability and continuous monitoring are required:
- Steam turbine generator systems
- Gas turbine monitoring units
- Centrifugal compressors
- Industrial pump systems
- Refinery and petrochemical equipment
- Marine propulsion shafts
- Large gearbox assemblies
- Power generation auxiliary equipment
It is commonly integrated into predictive maintenance and machinery protection systems.
7. Product Advantages
- High precision micro-displacement measurement
- Stable long-term signal output performance
- Strong resistance to electromagnetic interference
- Suitable for harsh industrial environments
- Modular design for flexible installation
- Reliable continuous operation capability
- High linearity within operating 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 diameter
- Modular architecture (probe, cable, driver)
- High interchangeability of system 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) |
|---|---|---|---|---|
| 330851-02-00-050-50-00-05 | Short cable version | 8 mm probe, 5 m cable, general machinery monitoring | 8 mm × 95 mm | 0.24 |
| 330851-02-00-060-50-00-05 | Current model | 8 mm probe, 6 m cable, medium distance installation | 8 mm × 98 mm | 0.40 |
| 330851-02-00-080-50-00-05 | Standard version | 8 mm probe, 8 m cable, industrial monitoring | 8 mm × 100 mm | 0.47 |
| 330851-02-00-090-50-00-05 | Extended cable version | 8 mm probe, 9 m cable, turbine applications | 8 mm × 102 mm | 0.52 |
| 330851-02-00-100-50-00-05 | 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 voltage | 120 × 80 × 40 mm | 0.45 |
| 330100-90-00 | Driver module | Signal amplification and conditioning unit | 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 330851-02-00-060-50-00-05 proximity probe system is designed for medium-distance installation scenarios where a 6-meter cable provides flexibility between the measurement point and monitoring cabinet.
It delivers stable and accurate shaft vibration and displacement measurement, making it suitable for continuous monitoring of rotating machinery in industrial environments.
The system plays an important role in predictive maintenance strategies, enabling early detection of mechanical faults such as imbalance, misalignment, bearing wear, and rotor instability, helping reduce downtime and improve equipment reliability.