Bently Nevada 330450-20 High Temperature Acceleration System Sensor

Product Overview – Bently Nevada 330450-20 High Temperature Acceleration System

330450-20 from Bently Nevada is a rugged vibration monitoring solution for extreme heat environments.

• Designed for continuous vibration monitoring in turbines, compressors, and heavy machinery.
• Handles surface temperatures up to 400°C at the sensing head.
• Provides stable signals for predictive maintenance and fault detection.
• Integrated hardline cable improves durability in harsh installations.
• Hermetically sealed housing prevents moisture and contamination.
• Supports long cable runs up to 305 meters without signal loss.
• Optimized for high-temperature industrial monitoring applications.

Technical Specifications

• Brand: Bently Nevada
• Model: 330450-20
• Product Type: High Temperature Acceleration System
• Cable Length: 2 meters
• Measurement Range: 80 g peak (785 m/s²)
• Sensitivity: 100 mV/g ±5%
• Frequency Response: 15 Hz to 10 kHz
• Amplitude Linearity: ±2% across full range
• Noise Floor: 0.006 g rms (10 Hz – 15 kHz)
• Transverse Sensitivity: Less than 5% of axial
• Resonant Frequency: Above 15 kHz
• Power Supply: -24 VDC ±0.5 V
• Bias Current: 2 mA nominal
• Output Bias Voltage: -12 VDC ±0.5 V
• Connector: 3-pin Mil-C-5015 stainless steel connector
• Housing Material: 300-series stainless steel
• Weight: 635 g (1.40 lb)
• Maximum Cable Length: 305 m without signal degradation

Temperature Capability

• Sensor Surface: -55°C to +400°C
• Integral Hardline Cable: -55°C to +400°C
• Electronic Housing: -55°C to +100°C
• Optional sensor cable version supports up to 482°C.

Environmental Durability

• Shock survivability up to 2500 g peak.
• Hermetically sealed enclosure resists moisture.
• Operates in up to 100% relative humidity when non-submerged.
• Case electrically isolated to reduce ground noise.
• Minimum cable bend radius: 51 mm.

Installation Guidelines

• Mount on rigid machine surfaces for best vibration transmission.
• Ensure proper connector engagement for reliable signal output.
• Avoid cable bends smaller than the minimum radius.
• Use approved intrinsic safety barriers when required.
• Follow installation drawing 168078 for hazardous locations.

Commissioning and Maintenance

• Verify power supply voltage before system startup.
• Check signal output using vibration monitoring equipment.
• Inspect connectors periodically for corrosion or damage.
• Clean mounting surfaces during scheduled maintenance.
• Long service life reduces replacement frequency.

Compatibility

• Works with Bently Nevada vibration monitoring systems.
• Compatible with industrial condition monitoring platforms.
• Supports intrinsically safe circuits for hazardous areas.
• Suitable for integration with turbine and compressor monitoring.

Certifications and Safety Approvals

• ATEX / IECEx Certified
• Ex ia IIC T4 intrinsic safety protection
• Class I Division 1 Groups A, B, C, D
• Class II Division 1 Groups E, F, G
• Class III Division 1 approval
• Zone 2: Ex ec / Ex nL protection
• Enclosure Type 4X industrial protection

Typical Applications

• Gas and steam turbine monitoring
• Industrial compressor vibration detection
• High-temperature process equipment
• Petrochemical plant rotating machinery
• Predictive maintenance systems

Diagnostic Capabilities

• Detect early bearing faults and imbalance.
• Identify shaft misalignment and structural looseness.
• Monitor vibration trends for predictive maintenance.
• Improve equipment reliability and uptime.

Packing List

• 1 × Bently Nevada 330450-20 acceleration system
• Factory sealed protective packaging
• Product identification and documentation

Warranty and Shipping

• 12-month warranty against manufacturing defects.
• Worldwide delivery available.
• Shipping carriers: FedEx, UPS, DHL.
• Secure packaging protects equipment during transit.

FAQ – Selection and Practical Experience

• What makes this sensor suitable for high temperature machines?
• The sensing head tolerates temperatures up to 400°C while maintaining measurement accuracy.
• Can the sensor operate in hazardous areas?
• Yes. It carries ATEX and IECEx intrinsic safety approvals for explosive environments.
• How long can the signal cable be?
• The system supports cable lengths up to 305 meters without signal degradation.
• What machines commonly use this sensor?
• Gas turbines, compressors, pumps, and refinery rotating equipment.
• How do I select the correct cable length?
• Choose the model suffix based on installation distance. Model 330450-20 provides a 2-meter cable.
• How often should the sensor be inspected?
• Inspect during routine vibration monitoring maintenance cycles.

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