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- 330851-04-000-015-10-00-05
- 3300 XL 25mm Proximity Probe
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Technical Engineering Report
330851-04-000-015-10-00-05 Proximity Probe System
1. Product Overview
The model 330851-04-000-015-10-00-05 is an 8 mm eddy current proximity probe assembly designed for high-precision measurement of shaft vibration, axial displacement, and rotor dynamic behavior in rotating machinery.
It is a non-contact displacement sensing system that converts changes in distance between the probe tip and a conductive shaft into a proportional electrical signal. This signal is used for real-time condition monitoring and machinery protection applications.
The “015” in the model code typically indicates a 1.5-meter cable configuration, making this version suitable for compact installations or close-range monitoring points.
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 product series is widely used in rotating machinery condition monitoring applications, especially in turbines, compressors, and pumps requiring continuous monitoring reliability.
3. Product Introduction
This probe system is designed for permanent installation in industrial 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
- Cable length: 1.5 m
- Cable type: Shielded high-temperature coaxial cable
- Connector type: Miniature industrial coaxial connector
- Installation type: Threaded probe mounting
- Environmental resistance: Oil, heat, vibration resistant
4.3 Dimensions and Weight
| Item | Specification |
|---|---|
| Probe diameter | 8 mm |
| Probe length | ~100 mm |
| Cable length | 1.5 m |
| Total system length | ~1.7–2.0 m |
| Probe weight | 0.11 kg |
| Cable weight | 0.10 kg |
| System reference weight | 0.30 kg |
| Total assembled system weight | 0.21 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 allows continuous monitoring of key mechanical conditions such as:
- Shaft radial vibration
- Axial displacement (thrust position)
- Rotor stability condition
- High-precision short-distance measurement points
6. Application Areas
This model is commonly used in compact industrial monitoring environments:
- Small turbine assemblies
- Auxiliary pump systems
- Compressor skid packages
- Gearbox monitoring points
- OEM machinery integration systems
- Test bench rotating equipment
- Laboratory measurement systems
- Compact industrial motors
It is typically selected where installation space is limited and short cable routing is required.
7. Product Advantages
- High precision micro-displacement measurement capability
- Compact installation suitable for tight mechanical layouts
- Stable signal output performance
- Strong resistance to electromagnetic interference
- Reliable performance in harsh environments
- Modular structure for flexible installation
- High linearity across measurement range
- Suitable for OEM and compact machinery systems
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 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) |
|---|---|---|---|---|
| 330851-04-000-005-10-00-05 | Ultra short cable version | 8 mm probe, 0.5 m cable | 8 mm × 90 mm | 0.17 |
| 330851-04-000-010-10-00-05 | Short cable version | 8 mm probe, 1 m cable | 8 mm × 95 mm | 0.19 |
| 330851-04-000-015-10-00-05 | Current model | 8 mm probe, 1.5 m cable | 8 mm × 100 mm | 0.21 |
| 330851-04-000-020-10-00-05 | Medium cable version | 8 mm probe, 2 m cable | 8 mm × 100 mm | 0.22 |
| 330851-04-000-050-10-00-05 | Extended cable version | 8 mm probe, 5 m cable | 8 mm × 100 mm | 0.24 |
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 330851-04-000-015-10-00-05 proximity probe system is designed for short-distance, high-precision installation scenarios requiring compact cable routing and stable signal performance.
It provides accurate and continuous measurement of shaft vibration and displacement in rotating machinery, making it suitable for OEM equipment, compact industrial systems, and test applications.
The system is widely used in predictive maintenance strategies to detect early mechanical faults such as imbalance, misalignment, and bearing wear, improving operational reliability and reducing maintenance cost.