Robust Vibration Monitoring Sensor for Industrial Machinery Protection Systems
The Bently Nevada 330500-01-RU Velomitor Piezoelectric Velocity Sensor is a high-reliability vibration measurement device designed for continuous condition monitoring of industrial rotating equipment. As part of the 330500 Velomitor® family, it uses integrated piezoelectric accelerometer technology to provide accurate absolute vibration velocity measurements from bearing housings, machine casings, and structural components.
The “-RU” configuration typically indicates a regional or packaging variation within the same 330500 platform, while maintaining the same core sensing principles and performance characteristics. This sensor is widely used in predictive maintenance systems where stable, long-term vibration monitoring is essential for preventing unexpected machinery failures.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Product Type | Velomitor Piezoelectric Velocity Sensor |
| Model Number | 330500-01-RU |
| Series | 330500 Velomitor® |
| Measurement Type | Absolute vibration velocity |
| Sensing Technology | Integrating piezoelectric accelerometer |
| Sensitivity | 3.94 mV/mm/s (100 mV/in/s) ±5% |
| Frequency Response | 4.5 Hz to 5 kHz (±3 dB) / 6 Hz to 2.5 kHz (±0.9 dB) |
| Maximum Velocity Range | Up to 1270 mm/s (50 in/s peak) |
| Housing Material | 316L stainless steel |
| Electrical Connector | 2-pin MIL-C-5015 sealed connector |
| Operating Temperature | -55°C to +121°C |
| Shock Resistance | Up to 5000 g peak |
| Mounting Type | Stud-mounted (machine casing / bearing housing) |
| Cable Length Capability | Up to 305 m (1000 ft) |
| Weight | Approx. 140–150 g |
| Dimensions | Approx. 25.3 mm diameter × 63.2 mm height |
Industrial Applications
The 330500-01-RU is widely used in predictive maintenance and machinery protection applications across heavy industries:
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Steam and gas turbines
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Centrifugal compressors
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Large industrial pumps
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Electric motors and generators
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Cooling tower fans and blowers
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Gearboxes and drive systems
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Petrochemical processing plants
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Oil and gas facilities
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Power generation stations
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Water treatment infrastructure
Its continuous vibration monitoring capability supports early detection of mechanical degradation such as imbalance, misalignment, looseness, and bearing wear.
Key Advantages
Solid-State Measurement Reliability
No moving parts, ensuring long-term stability and reduced maintenance needs.
High-Precision Vibration Output
Delivers accurate velocity signals suitable for advanced diagnostic systems.
Harsh Environment Durability
316L stainless steel construction and wide temperature tolerance support extreme industrial conditions.
Predictive Maintenance Capability
Enables early fault detection and reduces unplanned downtime risks.
Flexible Installation Options
Can be mounted in multiple orientations without performance degradation.
Long Cable Transmission Support
Allows installation in large-scale industrial monitoring systems.
Technical FAQs
1. What does the 330500-01-RU measure?
It measures absolute vibration velocity of machine structures and bearing housings.
2. What does “Velomitor” mean?
It refers to Bently Nevada’s piezoelectric velocity sensor technology.
3. Is this a standalone device?
No, it must be connected to a compatible vibration monitoring system.
4. What is the difference in the “-RU” suffix?
It typically indicates a configuration or regional variant within the same product family.
5. Which machines commonly use it?
Turbines, compressors, pumps, motors, and fans.
6. Does it require external signal conditioning?
No, it has integrated electronics for direct velocity output.
7. Can it operate in high-temperature environments?
Yes, up to approximately +121°C operating temperature.
8. Is it suitable for continuous monitoring?
Yes, it is designed for 24/7 industrial condition monitoring.
9. Does it have mechanical wear components?
No, it is fully solid-state.
10. Is this model still widely used?
Yes, it remains common in industrial predictive maintenance systems worldwide.
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