Bently 330780-90-05

Technical Specifications

• Part Number: 330780-90-05
• Probe Type: Eddy-current proximity transducer, integral cable design
• Probe Diameter: 8 mm (0.315 inches)
• Linear Measurement Range: 0 to 2 mm (0 to 0.0787 inches)
• Integral Cable Length: 5 meters (16.4 feet)
• Operating Frequency Range: 0 to 10,000 Hz
• Output Signal: 4–20 mA DC (proportional to displacement); 0–5 V DC optional
• Supply Voltage: 18–32 V DC (nominal 24 V DC)
• Operating Temperature Range: Probe Housing: -51 °C to +177 °C (-60 °F to +351 °F)
• Cable: -40 °C to +125 °C (-40 °F to +257 °F)

Function Features

• Integral Cable Design for Simplified Installation: The pre-assembled 5-meter cable eliminates the need for separate extension cables and connectors, reducing installation time, minimizing connection points (a common source of signal loss), and lowering the risk of wiring errors. This design is particularly advantageous in tight spaces where routing multiple cables is challenging.
• High-Precision Eddy-Current Sensing: Utilizes advanced eddy-current technology to detect shaft movement with ±1% accuracy and 0.001 mm resolution. This level of precision ensures early detection of subtle anomalies such as shaft misalignment, bearing degradation, or rotor imbalance—critical for preventing catastrophic equipment failure.
• Broad Frequency Response: The 0–10,000 Hz frequency range covers the full spectrum of vibrations and rotational speeds encountered in most industrial rotating machinery, from slow-speed pumps to high-speed gas turbines. It captures both low-frequency structural vibrations and high-frequency bearing faults with equal reliability.
• Extreme Environmental Durability: The AISI 316 stainless steel probe housing resists corrosion, chemical exposure (including oils, solvents, and industrial cleaners), and physical impact. The FEP-insulated cable withstands temperature extremes and abrasion, while the IP67 rating ensures protection against dust and temporary water immersion—making it suitable for harsh industrial settings.
• Stable Signal Transmission: The integral cable features shielded construction that minimizes electromagnetic interference (EMI) and radio frequency interference (RFI) from nearby electrical equipment. This ensures the 4–20 mA output signal remains consistent and accurate, even in high-noise industrial environments.
• Seamless System Compatibility: Designed to work flawlessly with Bently Nevada’s 3300 XL monitoring racks, transmitters, and data acquisition systems. It also supports integration with third-party SCADA, DCS, and predictive maintenance platforms via standard analog outputs, ensuring flexibility in existing setups.
• Low Maintenance Requirements: Industrial-grade components and rugged construction reduce wear and tear, resulting in a long operational lifespan. The integral design eliminates connector maintenance, and the device requires no regular calibration under normal operating conditions—only periodic functional checks.
• Visual Status Indicators (Optional): Selected configurations include LED indicators that provide real-time feedback on power status and signal integrity, allowing maintenance technicians to quickly verify device operation without specialized tools.

Application Scenarios

• Power Generation: Deployed in thermal, nuclear, and hydroelectric power plants to monitor steam turbines, gas turbines, generators, and feedwater pumps. It tracks shaft vibration and axial position to prevent rotor rubs, bearing failures, and other issues that could disrupt power generation.
• Oil & Gas Industry: Used in upstream (drilling rigs, mud pumps), midstream (pipeline compressors), and downstream (refinery crackers, distillation column pumps) operations. Its corrosion resistance and chemical tolerance make it ideal for offshore platforms and harsh refinery environments.
• Chemical & Pharmaceutical Manufacturing: Applied to monitor mixers, agitators, and process pumps in reactors and production lines. The stainless steel construction and chemical-resistant cable comply with strict hygiene and safety standards, preventing contamination and ensuring process stability.
• Marine & Naval Systems: Installed in ship propulsion systems, marine engines, and offshore drilling equipment. The IP67 rating and saltwater corrosion resistance make it suitable for harsh marine environments, while the compact design fits in tight engine room spaces.
• Metallurgy & Mining: Utilized in steel mills (rolling mill motors), aluminum smelters (compressor units), and mining operations (crushers, grinding mills). It withstands high dust levels, extreme temperatures, and heavy vibration, ensuring reliable monitoring of critical production equipment.
• Aerospace & Defense: Used in aircraft ground support equipment (jet engine test stands) and military vehicles (tank engines, generator sets). The high precision and rugged design meet the strict reliability requirements of defense applications.
• Pulp & Paper Industry: Monitors papermaking machine rollers, dryers, and vacuum pumps. The device’s resistance to moisture and pulp byproducts ensures consistent operation, preventing paper breaks and reducing production waste.
• Automotive Manufacturing: Applied to monitor robotic assembly arms, conveyor system motors, and engine test benches. The compact integral design fits in automated production lines, while the high frequency response captures vibrations from fast-moving components.