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- 330903-00-04-05-02-RU
- 3300 XL NSv Proximity Probe
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Industrial Proximity Probe System – Model 330903-00-04-05-02-RU
Brand
The model 330903-00-04-05-02-RU belongs to the industrial machinery condition monitoring and protection product family of Bently Nevada.
This product line is widely used in heavy industries such as power generation, oil and gas, petrochemical refining, marine propulsion, mining, metallurgy, paper production, and large-scale mechanical manufacturing. The monitoring solutions are designed to ensure continuous machinery protection, improve operational reliability, and support predictive maintenance strategies for critical rotating assets.
Product Series
The 330903-00-04-05-02-RU is part of the 3300 XL 8 mm Proximity Probe Series.
This series is designed for precise non-contact measurement of shaft displacement using eddy current sensing technology. It is typically used as part of a complete monitoring system that includes:
- Proximity probe
- Extension cable
- Signal conditioning module
Key characteristics of the series include:
- High accuracy and repeatability
- Stable long-term performance
- Strong resistance to industrial interference
- High temperature tolerance
- Excellent vibration resistance
- Compact installation design
- Continuous monitoring capability
- Easy integration into machinery protection systems
The RU suffix generally represents a configuration or regional variant within the same product platform.
Product Introduction
The 330903-00-04-05-02-RU is a high-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, allowing accurate displacement measurement while eliminating mechanical wear. During operation, changes caused by rotor imbalance, misalignment, bearing wear, thermal expansion, shaft eccentricity, or mechanical looseness are converted into electrical signals for monitoring and analysis.
Its robust construction ensures reliable operation in harsh industrial environments, including exposure to oil mist, dust, vibration, humidity, and high temperatures.
The compact design allows installation in confined mechanical spaces such as bearing housings and internal machine assemblies.
Working Principle
The probe operates based on eddy current technology.
A high-frequency electromagnetic field is generated at the sensing tip.
When a conductive shaft enters the field, eddy currents are induced on the shaft surface.
These eddy currents change the electrical impedance of the probe system.
The signal conditioning unit converts these impedance changes into a proportional analog voltage output representing shaft displacement.
This method provides accurate, stable, and contact-free measurement suitable for continuous industrial monitoring.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 330903-00-04-05-02-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 330903-00-04-05-02-RU is widely used in industrial rotating machinery monitoring applications.
Typical applications include:
- Steam turbine systems
- Gas turbine generator sets
- Hydroelectric power units
- Centrifugal compressors
- Axial compressors
- Industrial gas compressors
- High-speed electric motors
- Industrial pump systems
- Boiler feed pumps
- Cooling water pumps
- Marine propulsion systems
- Metallurgical rolling mills
- Mining machinery systems
- Cement production equipment
- Petrochemical processing units
- Chemical production plants
- Natural gas compressor stations
- Industrial blower systems
- Large ventilation fans
- Heavy-duty rotating equipment
It is particularly suitable for critical machinery requiring continuous condition monitoring.
Product Advantages
The 330903-00-04-05-02-RU provides multiple operational advantages:
- Non-contact measurement eliminates mechanical wear
- High precision displacement sensing
- Stable long-term performance
- Fast dynamic response to shaft movement
- High sensitivity to micro-vibration
- Durable stainless steel construction
- Excellent resistance to harsh environments
- Strong electromagnetic interference protection
- Reliable 24/7 continuous operation
- Compact design for confined installation spaces
- Low maintenance requirements
- Long operational lifespan
- Supports predictive maintenance systems
- Improves equipment reliability
- Reduces unexpected downtime
- Enhances industrial safety and efficiency
Recommended Models from the Same Series
| Model | Description | Probe Diameter | Dimensions | Weight (kg) |
|---|---|---|---|---|
| 330901-00-04-05-02-RU | Standard Proximity Probe | 8 mm | Ø8 × 50 mm | 0.11 |
| 330902-00-04-05-02-RU | High Stability Probe | 8 mm | Ø8 × 50 mm | 0.12 |
| 330904-00-04-05-02-RU | Extended Configuration Probe | 8 mm | Ø8 × 55 mm | 0.14 |
| 330905-00-04-05-02-RU | Heavy-Duty Industrial Probe | 8 mm | Ø8 × 65 mm | 0.15 |
| 330906-00-04-05-02-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 | Shaft Displacement Monitoring | 160 × 100 × 40 | 0.45 |
| 3500/22M | Rack Interface Module | System Communication Interface | 150 × 100 × 35 | 0.40 |
| 3500/92 | Communication Gateway Module | Industrial Network Communication | 180 × 120 × 50 | 0.60 |
| 3500/15 | Power Supply Module | System Power Distribution | 200 × 130 × 60 | 0.75 |
Summary
The 330903-00-04-05-02-RU is a 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 delivers stable measurement performance, high accuracy, strong environmental resistance, and long-term operational reliability. These characteristics make it suitable for turbines, compressors, pumps, motors, generators, and other critical rotating equipment operating under demanding industrial conditions.
Its compact structure, durable stainless steel housing, and consistent signal output make it a reliable solution for predictive maintenance, machinery protection, and continuous condition monitoring applications.