Bently 330851-02-000-070-10-00-05

Technical Specifications

• Part Number: 330851-02-000-070-10-00-05
• Technology Type: Piezoelectric acceleration transducer (charge-mode with integrated signal conditioner)
• Measurement Parameter: Vibration acceleration (peak, RMS, and peak-to-peak); convertible to velocity (mm/s) and displacement (mm) via signal processing
• Measurement Range: ±100 g peak (g = 9.81 m/s²)
• Frequency Response: 0.3 Hz to 15,000 Hz (±3 dB)
• Sensitivity: 50 mV/g (calibrated at 159 Hz; adjustable via monitoring system)
• Output Signal: 4–20 mA DC (proportional to acceleration); optional 0–10 V DC output
• Supply Voltage: 18–32 V DC (nominal 24 V DC)
• Power Consumption: ≤ 3.5 W at 24 V DC
• Cable Configuration: 70 meters (229.7 feet) shielded twisted pair; FEP insulation, double-layer stainless steel armor
• Mounting Specification: 10-32 UNF threaded stud (integral, with locknut for secure fixation)
• Operating Temperature Range: -40 °C to +135 °C (-40 °F to +275 °F)
• Storage Temperature Range: -55 °C to +160 °C (-67 °F to +320 °F)
• Mechanical Construction: Housing: Grade 5 titanium alloy (high strength-to-weight ratio, corrosion-resistant)
• Sensing Element: Lead zirconate titanate (PZT-5A) piezoelectric crystal
• Cable Shielding: 98% coverage braided tinned copper (EMI/RFI immunity)

Function Features

• Extended Cable Reach with Signal Integrity: The 70-meter double-armored cable enables installation on remote equipment (e.g., offshore platform components, tall wind turbine nacelles) without signal degradation. The 98% coverage copper shielding and balanced signal design eliminate electromagnetic interference (EMI) from nearby power lines, motors, and control systems—critical for long cable runs.
• High-Frequency and Wide Dynamic Range: The 0.3–15,000 Hz frequency response captures ultra-low-frequency structural vibrations (e.g., foundation resonance at 0.3–10 Hz) and ultra-high-frequency component faults (e.g., rolling bearing defects at 5,000–15,000 Hz). The ±100 g dynamic range accommodates both subtle anomalies and severe shock events.
• Secure 10-32 UNF Mounting: The integral 10-32 UNF threaded stud, paired with a locknut, ensures rigid, vibration-resistant mounting. It is compatible with standard mounting brackets, magnetic bases, and adhesive pads, facilitating installation on flat, curved, or vertical machinery surfaces without compromising measurement accuracy.
• Titanium Housing for Extreme Durability: Grade 5 titanium housing resists corrosion from saltwater, industrial chemicals (acids, solvents), and harsh weather conditions. It operates reliably in high-temperature environments (up to 135 °C), making it suitable for applications such as turbine casings and exhaust systems.
• High Sensitivity and Precision: The 50 mV/g sensitivity and 0.0005 g resolution detect minute acceleration changes—such as early-stage gear tooth wear or bearing fatigue—before they escalate into catastrophic failures. The ±0.8% accuracy ensures consistent, trustworthy data for predictive maintenance algorithms.
• Submersible and Dust-Tight Design: The IP68 rating allows temporary submersion in water or other non-corrosive fluids, making it ideal for wet environments such as wastewater treatment plants, marine engines, and subsea equipment. The sealed connector prevents moisture ingress, extending operational lifespan.
• Seamless System Integration: The pre-terminated bayonet connector mates directly with Bently 3300 XL monitoring racks, transmitters, and data loggers. It also integrates with third-party DCS (Distributed Control Systems), SCADA (Supervisory Control and Data Acquisition), and predictive maintenance software (e.g., Siemens MindSphere, GE Predix) via standard 4–20 mA output.
• Robust Shock and Vibration Resistance: Withstands 3,000 g peak shock, making it durable for high-impact applications such as mining crushers, construction equipment, and reciprocating engines. The reinforced cable-transducer junction prevents damage from mechanical stress or cable tugging.
• Multi-Parameter Compatibility: Acceleration data can be converted to velocity or displacement through Bently’s monitoring software, eliminating the need for multiple transducers and simplifying system design. This versatility reduces equipment costs and installation complexity.

Application Scenarios

• Power Generation (Large Turbines & Generators): Installed on steam turbines, gas turbines, and hydroelectric generators to monitor bearing acceleration, rotor imbalance, and stator vibration. The extended cable reaches remote turbine sections, while high-frequency response detects blade flutter and generator winding faults.
• Oil & Gas (Offshore & Subsea): Deployed on offshore drilling rigs, subsea wellheads, and pipeline compressors. The titanium housing resists saltwater corrosion, IP68 rating handles submersible conditions, and 70-meter cable accommodates large platform layouts.
• Renewable Energy (Wind & Solar): Used on wind turbine gearboxes, generators, and solar tracker drives. The long cable enables mounting in nacelles (up to 100 meters above ground), while high sensitivity detects gear wear and bearing degradation in remote wind farms.
• Aerospace & Defense (Engine Testing): Installed in jet engine test stands, rocket propulsion systems, and military vehicle engines. The high-frequency response (up to 15,000 Hz) captures combustion-induced vibrations, ensuring compliance with aerospace safety standards.
• Mining & Minerals Processing: Applied to crushers, grinding mills, and conveyor system motors. The shock resistance and armored cable withstand high-impact, dusty environments, monitoring acceleration to prevent unplanned downtime in continuous-production operations.
• Marine & Naval Systems: Used in ship propulsion engines, propeller shafts, and submarine auxiliary systems. The corrosion-resistant design and IP68 rating handle saltwater exposure, while the 10-32 UNF mounting simplifies installation on metal hull components.
• Chemical & Pharmaceutical (High-Temp Processes): Monitors high-temperature reactors, centrifuges, and mixer drives. The transducer’s 135 °C operating limit and chemical-resistant housing comply with strict safety standards for handling hazardous materials.
• Automotive (Motorsports & Testing): Deployed in race car engines, transmission test rigs, and electric vehicle (EV) motor prototypes. The high sensitivity and wide dynamic range capture vibration during extreme performance testing, optimizing component durability.
• Water & Wastewater Treatment: Installed on large pumps, blowers, and aerators. The IP68 rating withstands wet environments, while the extended cable reaches equipment in remote treatment plant areas.