Product Overview
The Bently Nevada 330500-00-20 Velomitor Piezoelectric Velocity Sensor is an industrial vibration transducer designed to provide precise velocity measurements of machinery vibrations — a key metric for condition monitoring and predictive maintenance. Using piezoelectric technology, it converts mechanical vibration into a clean electrical signal, offering durability, stability, and long-term reliability in demanding industrial environments.
Engineered to outperform traditional moving-coil probes, the Velomitor sensor has no moving parts, reducing wear and long-term drift while ensuring consistent performance under harsh operating conditions.
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Piezoelectric Velocity Sensor |
| Model Number | 330500-00-20 |
| Sensing Technology | Piezoelectric integrating velocity transducer |
| 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) |
| Velocity Range | 1270 mm/s (50 in/s) peak |
| Transverse Sensitivity | < 5% of main axis |
| Noise Floor | ~0.004 mm/s rms |
| Output | Voltage proportional to velocity |
| Connector | 2-pin industrial connector |
| Maximum Cable Length | Up to 305 m (1000 ft) |
| Operating Temperature | -55°C to +121°C |
| Mounting | Stud-mounted to bearing housing |
Industrial Applications
The 330500 Velomitor is used for vibration analysis and condition monitoring of rotating machinery and industrial equipment:
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Bearing wear and imbalance detection on pumps and compressors
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Vibration monitoring of steam and gas turbines
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Performance tracking on electric motors and generators
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Machinery health diagnostics in petrochemical and chemical plants
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Condition-based maintenance in power generation systems
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Structural vibration measurement in industrial frameworks
By providing velocity output, it allows early detection of faults like looseness, misalignment, and bearing degradation.
Key Advantages
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Solid-state piezoelectric design: no moving parts, reducing wear and long-term drift
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Wide frequency range: captures a broad spectrum of vibration frequencies
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Long cable support: maintains signal integrity over runs up to 305 m
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High sensitivity and linearity: consistent output across velocity range with minimal transverse error
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Rugged construction: withstands extreme temperatures and mechanical stress
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Easy integration: compatible with Bently Nevada monitoring and condition monitoring systems
These advantages make the 330500 Velomitor a reliable choice for industrial machinery monitoring and predictive maintenance programs.
Technical FAQs
1. What does the Velomitor measure?
It measures vibration velocity, ideal for machinery condition monitoring.
2. How does the piezoelectric technology benefit performance?
Solid-state sensing with no moving parts improves durability and reduces drift.
3. What frequency range can it detect?
Typical response spans 4.5 Hz to 5 kHz (±3 dB).
4. Can it be used with long cable runs?
Yes — it preserves signal integrity up to ~305 m of cable.
5. What is its sensitivity?
Approximately 3.94 mV per mm/s of vibration velocity.
6. Where is it typically mounted?
Stud-mounted on bearing housings or machine casings near critical components.
7. Is it suitable for harsh environments?
Yes, its robust housing tolerates wide temperature ranges.
8. What connector type does it use?
A rugged 2-pin industrial connector.
9. What machinery benefits most from this sensor?
Pumps, turbines, motors, compressors, and other high-speed rotating equipment.
10. Does it integrate with monitoring systems?
Yes, it works seamlessly with Bently Nevada condition monitoring hardware.
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