Bently 330877-080-37-00

Technical Specifications

• Part Number: 330877-080-37-00
• Technology Type: Eddy-current non-contact proximity transducer system
• Core Measurement Parameters: Shaft displacement, axial position, rotor vibration, differential expansion
• Probe Specifications: Diameter: 37 mm (1.457 inches)
• Tip Material: Hardened alumina ceramic (scratch and wear resistant)
• Housing Material: AISI 316L stainless steel (high corrosion resistance)
• Mounting Thread: M40 x 1.5 (metric, with locknut)

Function Features

• Large-Diameter Probe for Extended Range: The 37 mm probe diameter enables an 80 mm linear measurement range, making it ideal for machinery with significant shaft movement—such as large steam turbines, hydroelectric generators, and industrial compressors. This eliminates the need for multiple sensors, simplifying system design and reducing costs.
• Eddy-Current Non-Contact Operation: The non-contact design avoids physical wear on both the probe and the shaft, ensuring consistent performance over a 10+ year operational lifespan. It operates reliably even at 40,000 RPM, making it suitable for high-speed gas turbines and turbochargers.
• Superior Corrosion Resistance: AISI 316L stainless steel housing and FEP cable insulation resist corrosion from saltwater, industrial chemicals (acids, solvents), and hydrocarbons. This makes the transducer suitable for offshore, marine, and petrochemical environments where corrosion is a critical concern.
• Advanced EMI/RFI Shielding: 95% coverage braided copper shielding eliminates electromagnetic and radio frequency interference from nearby motors, power cables, and control systems. This ensures stable, accurate signals even in high-electrical-noise industrial settings.
• High Precision and Low Drift: ±0.4% accuracy and 0.005 mm resolution capture subtle shaft movements, enabling early detection of bearing fatigue, rotor imbalance, or misalignment. Temperature-compensated circuitry minimizes drift across the entire operating temperature range, preventing false alarms.
• Submersible and Dust-Tight Design: The IP68 rating allows the probe to operate submerged in water or other non-corrosive fluids for extended periods, making it suitable for subsea pumps, wastewater treatment equipment, and marine propulsion systems.
• Seamless System Integration: The proprietary 10-pin bayonet connector mates directly with Bently 3300 XL monitoring racks, transmitters, and data acquisition systems. It also integrates with third-party DCS (Siemens PCS 7, Emerson DeltaV) and SCADA platforms via voltage or current outputs.
• Robust Mechanical Construction: The hardened ceramic probe tip resists accidental impact and scratches, while the M40 x 1.5 mounting thread ensures secure, vibration-resistant installation. The connector’s water-sealed design prevents moisture ingress, extending component life.
• Wide Temperature Adaptability: The probe operates reliably from -51 °C to +180 °C, accommodating extreme environments—from cryogenic applications to high-heat turbine casings—without performance degradation.

Application Scenarios

• Power Generation (Large Turbines): Installed on steam turbines, gas turbines, and combined-cycle generators to monitor axial position, differential expansion, and shaft vibration. The 80 mm range accommodates thermal expansion in large rotors, preventing rotor rubs and catastrophic failures that disrupt power supply.
• Oil & Gas (Offshore & Subsea): Deployed on offshore drilling rigs, subsea wellheads, and pipeline compressors. The AISI 316L housing resists saltwater corrosion, while the IP68 rating handles submersible conditions in subsea applications.
• Hydroelectric Power: Used in hydroelectric generator units to monitor runner shaft displacement and thrust bearing position. The non-contact design eliminates wear on large, slow-speed shafts, and the extended range handles axial movement caused by water pressure.
• Petrochemical Refining: Installed on catalytic crackers, hydrocrackers, and large centrifugal pumps. The chemical-resistant FEP cable and stainless steel housing withstand exposure to hydrocarbons and solvents, ensuring reliable data for safety-critical equipment.
• Marine & Naval Engineering: Deployed in ship propulsion systems, marine diesel engines, and submarine auxiliary pumps. The IP68 rating and saltwater resistance make it suitable for harsh marine environments, while the 37 mm probe fits in compact engine compartments.
• Metallurgy & Heavy Industry: Applied to rolling mill motors, blast furnace fans, and large gearboxes in steel plants. The robust construction withstands high dust levels and extreme temperatures, while the extended range handles axial movement in heavy-duty machinery.
• Renewable Energy (Wind Turbines): Installed on wind turbine main shafts and gearboxes in offshore wind farms. The corrosion resistance and non-contact design ensure reliable operation in saltwater-rich, high-wind environments.
• Chemical & Pharmaceutical Manufacturing: Monitors agitators, centrifuges, and reactor shafts in chemical plants. The stainless steel housing and FEP cable comply with strict hygiene and safety standards, preventing contamination of processes.
• Mining & Minerals Processing: Used on large crushers, grinding mills, and conveyor system drives. The rugged construction and EMI shielding withstand high vibration and dust, providing accurate data for equipment critical to continuous production.