330752-25-00 Bently Nevada Velomitor Transducer | High Temp Vibration Monitor

330752-25-00 Bently Nevada High Temperature Velomitor System

330752-25-CN is engineered for continuous vibration monitoring in extreme-temperature industrial environments.

The system separates the sensing element from signal conditioning electronics to improve thermal survivability.

Its integrated hardline cable eliminates field connectors, reducing failure points in high-vibration applications.

The sensing head withstands mounted surface temperatures up to +400°C while maintaining stable signal performance.

This transducer platform delivers machinery vibration data comparable to standard Velomitor systems under severe thermal exposure.

High-Temperature Monitoring Architecture

• Thermal Isolation Structure
  • Remote electronics positioning design
  • Integrated hardline cable construction
  • Reduced thermal stress on electronics
• Vibration Sensing Platform
  • Piezo-velocity monitoring technology
  • Wide industrial frequency response
  • Stable high-temperature signal acquisition
• Industrial Reliability Design
  • Hermetically sealed stainless steel construction
  • Connector-free integrated sensing structure
  • High shock survivability capability
• Extended Signal Transmission Capability
  • Supports cable runs up to 305 meters
  • Maintains signal integrity over long distances
  • Suitable for remote instrumentation cabinets

Configuration Breakdown

Global PLC Spare HUB's Insight

Bently Nevada 330752 Series addresses vibration monitoring challenges in elevated-temperature process equipment.

The connector-free architecture improves long-term reliability in severe industrial environments with continuous thermal cycling.

Engineers frequently deploy this system on turbines, kilns, exhaust systems, and high-temperature process machinery.

The remote electronics configuration significantly improves operational stability near radiant heat sources.

Its wide dynamic measurement capability supports advanced machinery condition diagnostics in critical assets.

Typical Equipment and Process Applications

• Gas turbine exhaust monitoring systems
• Steam turbine bearing vibration analysis
• Industrial kiln rotating equipment
• Furnace blower machinery diagnostics
• Petrochemical process compressors
• High-temperature fan assemblies
• Power plant auxiliary systems
• Refinery process equipment monitoring

Performance and Electrical Characteristics

• Manufacturer: Bently Nevada
• Product Number: 330752-25-CN
• Product Type: High Temperature Velomitor System
• Country of Origin: Made in U.S.A.
• Cable Length: 2.5 meters
• Sensitivity: 5.7 mV/mm/s ±5%
• Frequency Response: 15 to 2000 Hz ±3.0 dB
• Precision Frequency Range: 20 to 1000 Hz ±0.9 dB
• Transient Temperature Sensitivity: 0.0762 mm/s/°C typical
• Amplitude Range: 635 mm/s peak below 680 Hz
• Shock Survivability: 24,535 m/s² peak
• Transverse Sensitivity: Less than 5%
• Amplitude Linearity: ±2% to 152 mm/s peak
• Mounted Resonant Frequency: Greater than 5 kHz
• Output Bias Voltage: -12 ±2.0 VDC
• Broadband Noise Floor: 0.127 mm/s rms nominal
• Grounding: Case isolated
• Maximum Cable Length: 305 meters
• Sensing Head Temperature: -55°C to +400°C
• Electronics Temperature: -55°C to +121°C
• Humidity Resistance: Up to 100% non-submerged
• Maximum Installation Altitude: 2000 meters
• Connector Type: 2-pin Mil-C-5015 receptacle
• Housing Material: 300 series stainless steel
• Minimum Bend Radius: 51 mm
• Temperature Classification: T1 and T4 rated

Industrial Monitoring and Diagnostic Capability

• Supports continuous machinery vibration analysis
• Detects rotor imbalance conditions early
• Improves bearing degradation monitoring accuracy
• Identifies abnormal mechanical resonance trends
• Supports predictive maintenance strategies
• Improves machinery shutdown prevention planning
• Enhances thermal process equipment reliability

Installation and Engineering Recommendations

• Position electronics away from direct radiant heat sources
• Maintain minimum cable bend radius during routing
• Protect conduit installations in outdoor environments
• Use splash boots where additional moisture protection is required
• Verify mounting surface integrity before installation
• Inspect cable isolation during commissioning procedures
• Maintain adequate clearance from high-voltage conductors

Environmental and Safety Advantages

• Stable operation under severe thermal exposure
• Hermetically sealed construction improves contamination resistance
• High shock tolerance supports demanding rotating machinery
• Reduced connector failure risk improves operational uptime
• Long-distance signal transmission supports flexible installation layouts

Packaging, Logistics, and Warranty

• Condition: New and original factory packing
• Warranty: 12 Months
• Courier Services: FedEx, UPS, DHL
• Packaging: Industrial export-grade protective packaging
• Shipping Support: Fast international dispatch available

Professional Engineering FAQ

• Why does the integrated cable structure improve long-term reliability?
  • Field connectors often become failure points under heat and vibration exposure.
  • Integrated hardline construction reduces electrical discontinuity risks.
• How should engineers position the signal conditioning electronics?
  • Install electronics in cooler locations away from direct thermal radiation.
  • This improves long-term measurement stability and component lifespan.
• What applications benefit most from high-temperature Velomitor systems?
  • Gas turbines, kilns, and furnace-driven equipment commonly require elevated-temperature monitoring capability.
  • Standard vibration sensors may not survive these thermal conditions.
• What factors influence vibration signal accuracy at high temperatures?
  • Mechanical mounting stability and cable routing integrity strongly affect signal quality.
  • Thermal expansion conditions should also be evaluated during installation planning.
• When should engineers select the 330752 series instead of standard Velomitor sensors?
  • Choose high-temperature systems when mounted surface temperatures exceed +121°C.
  • This prevents thermal overstress and improves long-term monitoring reliability.

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