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- 330903-00-03-50-02-RU
- 3300 XL NSv Proximity Probe
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Industrial Proximity Probe System – Model 330903-00-03-50-02-RU
Brand
The model 330903-00-03-50-02-RU belongs to the industrial machinery condition monitoring product portfolio of Bently Nevada.
This brand is widely used in industrial sectors such as power generation, oil and gas, petrochemical processing, marine engineering, metallurgy, mining, and large-scale manufacturing. Its monitoring systems are designed to support continuous machinery health diagnostics, improve operational reliability, reduce maintenance downtime, and enable predictive maintenance strategies for critical rotating equipment.
Product Series
The 330903-00-03-50-02-RU is part of the 3300 XL 8 mm Proximity Probe Series.
This series is designed for high-precision, non-contact shaft displacement measurement using eddy current sensing technology. A complete system typically includes a proximity probe, extension cable, and signal conditioning module that work together to provide stable and accurate monitoring data for machinery protection systems.
Key characteristics of the series include:
- High measurement accuracy
- Excellent long-term stability
- Strong resistance to industrial interference
- Fast dynamic response
- High reliability in harsh environments
- Compact installation design
- Stable continuous monitoring performance
- Easy system integration
The RU suffix generally represents a regional or configuration-specific variant within the same 3300 XL platform.
Product Introduction
The 330903-00-03-50-02-RU is a precision non-contact eddy current proximity probe designed for continuous monitoring of shaft vibration, shaft position, radial displacement, and axial movement in rotating machinery.
The probe operates without physical contact with the shaft, enabling accurate measurement while eliminating mechanical wear. During machine operation, any movement caused by imbalance, misalignment, rotor instability, bearing degradation, thermal expansion, or mechanical looseness is converted into a proportional electrical signal.
The probe is designed for long-term stability and reliable operation in harsh industrial environments, including exposure to vibration, oil contamination, humidity, dust, and elevated temperatures.
Its compact structure allows installation in tight mechanical spaces such as bearing housings and internal machine assemblies.
Working Principle
The probe uses the eddy current measurement principle.
A high-frequency electromagnetic field is generated at the probe tip.
When a conductive metal surface (shaft) enters the field, eddy currents are induced on the surface.
These eddy currents modify the probe’s impedance characteristics.
The signal conditioning system converts these impedance changes into a proportional analog voltage output representing shaft displacement.
This non-contact method ensures stable performance, high accuracy, and long operational life.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 330903-00-03-50-02-RU |
| Product Type | Non-contact Proximity Probe |
| Measurement Principle | Eddy Current Technology |
| Series | 3300 XL 8 mm Proximity Probe Series |
| Probe Diameter | 8 mm |
| Measurement Function | Shaft Vibration, Shaft Position, Radial & Axial Displacement |
| Output Signal | Analog Voltage |
| Linear Measurement Range | Approximately 2–4 mm |
| Sensitivity | ~7.87 V/mm (system dependent) |
| Frequency Response | Suitable for high-speed rotating machinery |
| Housing Material | Stainless Steel |
| Cable Type | Shielded High-Temperature Coaxial Cable |
| Connector Type | Industrial Standard Connector |
| Installation Method | Threaded Mounting |
| Operating Temperature | -35°C to +177°C |
| Environmental Resistance | Oil, Dust, Moisture, Vibration Resistant |
| EMI/RFI Protection | High Immunity |
| Dimensions | Approximately Ø8 mm × 50 mm |
| Weight | Approximately 0.12 kg |
Product Applications
The 330903-00-03-50-02-RU is widely used in industrial machinery condition monitoring applications.
Typical applications include:
- Steam turbine systems
- Gas turbine generator units
- Hydroelectric power turbines
- Centrifugal compressors
- Axial compressors
- Industrial gas compressors
- High-speed motors
- Industrial pumps
- Boiler feedwater pumps
- Cooling water pumps
- Marine propulsion systems
- Paper production machinery
- Metallurgical rolling mills
- Mining machinery systems
- Cement production equipment
- Petrochemical process units
- Chemical processing plants
- Natural gas compressor stations
- Large industrial blowers
- Heavy-duty fan systems
It is especially suitable for equipment requiring continuous monitoring and early fault detection.
Product Advantages
The 330903-00-03-50-02-RU offers multiple performance and operational advantages.
- Non-contact measurement eliminates mechanical wear
- High precision displacement detection
- Stable long-term measurement performance
- Fast response to dynamic vibration changes
- High sensitivity to micro-level shaft movement
- Durable stainless steel construction
- Excellent resistance to harsh industrial conditions
- Strong immunity to electromagnetic interference
- Continuous 24/7 operational reliability
- Compact design suitable for confined installations
- Low maintenance requirements
- Long service life
- Supports predictive maintenance strategies
- Enhances equipment reliability
- Reduces unexpected downtime
- Improves operational safety and efficiency
Recommended Models from the Same Series
| Model | Description | Probe Diameter | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 330901-00-03-50-02-RU | Standard Proximity Probe | 8 mm | Ø8 × 50 mm | 0.11 |
| 330902-00-03-50-02-RU | High Stability Probe | 8 mm | Ø8 × 50 mm | 0.12 |
| 330904-00-03-50-02-RU | Extended Configuration Probe | 8 mm | Ø8 × 55 mm | 0.14 |
| 330905-00-03-50-02-RU | Heavy-Duty Industrial Probe | 8 mm | Ø8 × 65 mm | 0.15 |
| 330906-00-03-50-02-RU | Compact Installation Probe | 8 mm | Ø8 × 45 mm | 0.10 |
Recommended Popular Models from the Same Brand
| Model | Product Type | Function | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| 3500/42M | Vibration Monitor Module | Shaft Vibration Monitoring | 170 × 110 × 45 | 0.50 |
| 3500/40M | Proximitor Monitor | Displacement Measurement | 160 × 100 × 40 | 0.45 |
| 3500/22M | Rack Interface Module | System Communication | 150 × 100 × 35 | 0.40 |
| 3500/92 | Communication Gateway | Data Transmission | 180 × 120 × 50 | 0.60 |
| 3500/15 | Power Supply Module | System Power Management | 200 × 130 × 60 | 0.75 |
Summary
The 330903-00-03-50-02-RU is a high-precision non-contact eddy current proximity probe designed for continuous monitoring of shaft vibration, displacement, and position in industrial rotating machinery.
As part of the 3300 XL 8 mm Proximity Probe Series, it provides stable measurement performance, strong environmental resistance, high accuracy, and long-term operational reliability. These characteristics make it suitable for turbines, compressors, pumps, motors, generators, and other critical rotating equipment operating in demanding industrial environments.
Its compact structure, durable stainless steel construction, and reliable signal output make it a strong choice for predictive maintenance, machinery protection, and continuous condition monitoring applications.