Rugged Vibration Monitoring for Harsh Industrial Environments
The Bently Nevada 330525-00 Velomitor XA Piezo-Velocity Sensor is a heavy-duty industrial vibration sensor specifically designed for machinery operating in challenging environments where moisture, dust, vibration, and mechanical stress are common. As the eXtended Application (XA) version of the standard 330500 Velomitor Sensor, the 330525-00 features an enhanced weatherproof construction, armored cable assembly, and corrosion-resistant stainless-steel housing, making it ideal for outdoor and demanding process applications.
Utilizing advanced piezoelectric sensing technology with integrated electronics, the sensor delivers accurate absolute vibration velocity measurements while eliminating the wear associated with traditional moving-coil velocity transducers. Its sealed construction and IP65/NEMA 4X environmental protection allow reliable long-term operation in wet and contaminated environments when installed with the appropriate extension cable.
The 330525-00 model is supplied with the Agency Approval Option 00 (No approvals required), making it an excellent solution for standard industrial installations where hazardous-area certifications are not necessary.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330525-00 |
| Product Type | Velomitor XA Piezo-Velocity Sensor |
| Series | 330525 Velomitor XA |
| Sensor Technology | Integrating Piezoelectric Velocity Sensor |
| Measurement Type | Absolute Vibration Velocity |
| Sensitivity | 3.94 mV/mm/s (100 mV/in/s) ±5% |
| Velocity Range | Up to 1270 mm/s (50 in/s) Peak |
| Frequency Response | 4.5 Hz to 5 kHz (±3 dB) |
| Broadband Accuracy | 6 Hz to 2 kHz (±0.9 dB) |
| Mounted Resonant Frequency | Greater than 12 kHz |
| Supply Voltage | -22 to -30 VDC |
| Bias Current | 2.5 to 6.0 mA |
| Output Bias Voltage | -12 ±3 VDC |
| Dynamic Output Impedance | Less than 2400 Ω |
| Connector Type | 2-Pin MIL-C-26482 Hermetically Sealed Connector |
| Housing Material | 316L Stainless Steel |
| Environmental Rating | IP65 / NEMA 4X (with compatible cable assembly) |
| Agency Approval | 00 – None Required |
| Operating Temperature | -55°C to +121°C |
| Dimensions | 28 mm Diameter × 73.1 mm Height |
| Weight | Approximately 156 g (0.156 kg) |
Typical Industrial Applications
Designed for reliable performance in demanding operating conditions, the 330525-00 is widely used across industries where continuous machinery health monitoring is essential.
Typical applications include:
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Steam turbines
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Gas turbines
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Electric motors
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Industrial compressors
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Centrifugal pumps
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Cooling tower fans
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Gearboxes
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Blowers
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Offshore production equipment
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Petrochemical processing facilities
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Power generation plants
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Mining operations
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Water and wastewater treatment systems
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General rotating machinery with rolling-element bearings
Its ruggedized XA construction enables dependable vibration monitoring in outdoor installations and harsh industrial environments, helping maintenance teams identify imbalance, bearing damage, shaft misalignment, looseness, and structural vibration before equipment performance is affected.
Performance Advantages
The 330525-00 is engineered to deliver dependable vibration monitoring where environmental durability is as important as measurement accuracy.
Key advantages include:
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Rugged XA design for harsh industrial environments
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Solid-state piezoelectric technology with no moving mechanical components
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Weatherproof construction for outdoor installations
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IP65 and NEMA 4X protection when properly installed
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Corrosion-resistant 316L stainless-steel housing
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Wide frequency response for comprehensive machinery diagnostics
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Stable long-term measurement performance
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Low maintenance requirements throughout its service life
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Fully compatible with Bently Nevada machinery protection systems
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Helps improve equipment availability while reducing maintenance costs and unexpected downtime
Technical FAQs
1. What is the primary function of the 330525-00?
The sensor measures absolute vibration velocity on machine housings and bearing casings for continuous machinery condition monitoring.
2. What distinguishes the Velomitor XA from the standard 330500 sensor?
The XA version features a ruggedized design with a weatherproof connector, armored cable assembly, and enhanced environmental protection for harsh industrial applications.
3. What does the "-00" suffix indicate?
The -00 configuration specifies no hazardous-area agency approvals, making it suitable for standard industrial installations.
4. What sensing technology does the sensor use?
It employs a solid-state piezoelectric sensing element with integrated electronic signal conditioning to produce a direct velocity output.
5. What is the operating temperature range?
The sensor is designed for continuous operation between -55°C and +121°C.
6. What environmental protection does the sensor provide?
When installed with the approved extension cable, it meets IP65 and NEMA 4X environmental protection requirements.
7. Which industries commonly use the 330525-00?
It is widely used in power generation, oil and gas, mining, water treatment, chemical processing, and other heavy industrial applications.
8. What are the physical dimensions and weight?
The sensor measures 28 mm in diameter × 73.1 mm in height and weighs approximately 156 g.
9. Can the sensor be used for continuous online monitoring?
Yes. It is designed for permanent installation in continuous machinery protection and predictive maintenance systems.
10. Why is the 330525-00 a preferred solution for harsh environments?
Its rugged weatherproof construction, excellent vibration measurement accuracy, corrosion-resistant housing, and proven long-term reliability make it an outstanding choice for demanding industrial applications.
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