Bently Nevada 330752-25-CN High Temperature Velomitor System

Bently Nevada 330752-25-CN High Temperature Velomitor System

Bently Nevada 330752-25-CN is a high-temperature piezo-velocity vibration monitoring solution for extreme industrial environments.

This sensor system supports continuous machinery vibration monitoring on turbines, compressors, pumps, motors, and high-temperature process equipment.

The sensing head withstands temperatures up to +400°C (+752°F).

Its integrated hardline cable separates the sensing element from internal electronics.

This design improves reliability in demanding industrial installations.

Product Overview

• Brand: Bently Nevada
• Model: 330752-25-CN
• Series: 330750 / 330752 High Temperature Velomitor Series
• Product Type: High Temperature Velomitor System
• Sensor Technology: Piezo-velocity vibration sensing
• Country of Origin: Made in U.S.A.
• Cable Length: 2.5 meters
• Approval Option: CN Country-Specific Approvals
• Application: Continuous machinery condition monitoring

Technical Specifications

• Brand: Bently Nevada
• Model Number: 330752-25-CN
• Sensitivity: 5.7 mV/mm/s ±5%
• Frequency Response: 15 Hz to 2000 Hz ±3.0 dB
• Enhanced Frequency Accuracy: 20 Hz to 1000 Hz ±0.9 dB
• Measurement Range: 635 mm/s peak below 680 Hz
• Shock Resistance: 2500 g peak survivability
• Amplitude Linearity: ±2% up to 152 mm/s peak
• Mounted Resonant Frequency: Greater than 5 kHz
• Noise Floor: 0.127 mm/s rms nominal
• Bias Voltage: -12 ±2.0 VDC
• Transverse Sensitivity: Less than 5%
• Maximum Cable Distance: 305 meters without signal degradation
• Grounding: Case isolated
• Connector Type: 2-pin Mil-C-5015 hermetically sealed connector
• Housing Material: 300 series stainless steel
• Minimum Bend Radius: 51 mm

Temperature and Environmental Performance

• Sensing Head Temperature: -55°C to +400°C
• Integral Cable Temperature: -55°C to +400°C
• Electronics Temperature: -55°C to +121°C
• Humidity Resistance: 100% non-submerged environments
• Altitude Rating: Up to 2000 meters
• Outdoor Installation: Suitable with conduit protection
• Hermetic Sealing: Improved moisture and contamination resistance
• EMI Resistance: Stable signal transmission over long cable runs

Configuration Breakdown

• 330752 = High Temperature Velomitor System
• 25 = 2.5 Meter Integral Cable Length
• CN = Country-Specific Approval Configuration

Key Functional Advantages

• Supports reliable vibration monitoring in extreme heat zones.
• Separates sensing elements from sensitive electronics.
• Reduces connector-related failures.
• Maintains stable vibration signals over long distances.
• Provides accurate machinery condition diagnostics.
• Improves predictive maintenance efficiency.
• Supports continuous industrial operation.

Typical Application Scenarios

• Steam turbine vibration monitoring
• Gas turbine condition monitoring
• Industrial blower diagnostics
• Process compressor vibration analysis
• High-temperature motor monitoring
• Petrochemical rotating equipment protection
• Power generation asset monitoring
• Steel plant machinery diagnostics

Diagnostic Capabilities

• Detects imbalance conditions
• Identifies bearing wear symptoms
• Monitors shaft misalignment
• Detects looseness and resonance
• Tracks abnormal vibration trends
• Supports predictive maintenance strategies
• Improves machinery reliability planning

Installation Guidelines

• Install the sensing head on clean metal surfaces.
• Use proper mounting torque during installation.
• Keep electronics away from excessive heat.
• Protect field wiring using industrial conduit.
• Avoid cable bending below minimum radius.
• Verify connector polarity before commissioning.
• Use vibration-rated mounting hardware.

Commissioning and Maintenance Convenience

• Integrated cable design simplifies installation.
• Hermetically sealed housing reduces maintenance frequency.
• Long cable capability supports flexible routing.
• Stable output simplifies system calibration.
• Compatible with standard vibration monitoring systems.
• Supports quick replacement during shutdown maintenance.

Compatibility Information

• Compatible with Bently Nevada monitoring systems.
• Suitable for vibration transmitters and analyzers.
• Works with machinery protection systems.
• Supports industrial condition monitoring platforms.
• Suitable for turbine and compressor monitoring architectures.

Certification and Approval Information

• Approval Option: CN Country-Specific Approvals
• Temperature Class T1: -40°C to +400°C
• Temperature Class T4: -40°C to +100°C
• Hermetically sealed industrial construction
• Industrial-grade stainless steel enclosure

Packing List

• 1 × Bently Nevada 330752-25-CN Sensor System
• 1 × Integrated Hardline Cable
• 1 × Factory Inspection Documentation
• 1 × Product Datasheet

Shipping and Delivery

• Fast worldwide shipping available.
• Orders ship within 24-48 hours.
• Courier partners include FedEx, UPS, and DHL.
• Secure industrial export packaging provided.

Warranty Terms

• 12-month warranty coverage included.
• Technical support available during warranty period.
• Quality inspection completed before shipment.

Global PLC Spare HUB's Insight

Bently Nevada 330752 Series sensors target high-temperature vibration monitoring applications where conventional velocity sensors cannot operate reliably.

Its segregated electronics architecture significantly improves long-term stability in thermal stress environments.

Engineers frequently deploy this series on steam turbines, exhaust systems, refinery compressors, and heat-intensive rotating assets.

The long cable capability also simplifies remote electronics placement in confined industrial installations.

Recommended Equipment Compatibility

• Bently Nevada 3500 Monitoring Systems
• Bently Nevada vibration transmitters
• Industrial turbine monitoring systems
• Condition monitoring PLC platforms
• Rotating machinery protection systems
• Power plant asset monitoring systems

FAQ

What is the maximum operating temperature?

The sensing head supports continuous operation up to +400°C.

What cable length does model 330752-25-CN provide?

This configuration includes a 2.5-meter integral cable.

Can this sensor operate outdoors?

Yes. Proper conduit protection is recommended for outdoor installations.

What machinery types commonly use this sensor?

Users commonly install it on turbines, compressors, motors, and process machinery.

How does the integrated cable improve reliability?

The design removes intermediate connectors that often fail in harsh environments.

What installation practice improves measurement stability?

Use rigid mounting surfaces and minimize mechanical looseness near the sensor.

Can long cable runs reduce signal quality?

The system supports up to 305 meters without signal degradation.

Which version supports 400°C operation?

Versions with serial numbers beginning with the letter "G" support 400°C environments.

How should users select between 330500 and 330752 series?

Use the 330500 series for temperatures below 121°C.

Use the 330752 series for extreme high-temperature installations.

What is the recommended application environment?

This sensor performs best in high-temperature rotating equipment monitoring systems.

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