Product Overview

The Bently Nevada 330425-01-05 is a specialized piezoelectric accelerometer designed to monitor high-intensity vibration in mission-critical rotating machinery. Engineered to meet the rigorous API 670 standards, this transducer excels in capturing high-frequency signals that are often lost or distorted by standard sensors. With an optimized sensitivity of 25 mV/g, it is specifically built for environments where high vibration amplitudes occur, such as gearbox meshing and turbine casing analysis. This solid-state sensor provides the necessary data for Turbine Supervisory Instrumentation (TSI) systems to execute automated protection and detailed diagnostic trending.

Technical Hardware Parameters

The 330425-01-05 is a rugged, low-mass transducer that maintains exceptional linearity even under extreme mechanical acceleration.

• Model Identification 330425-01-05

• Transducer Type Piezoelectric Accelerometer

• Sensitivity 2.55 mV/m/s² (25 mV/g) ±5%

• Acceleration Range 735 m/s² (75 g) peak

• Frequency Response 10 Hz to 15 kHz (600 to 900,000 cpm) ±3.0 dB

• Linearity ±1% up to full scale (75 g)

• Mounting Interface 1/4-28 UNF integral stud (Option -01)

• Agency Approvals CSA, ATEX, and IECEx hazardous area rated (Option -05)

• Resonant Frequency >30 kHz (20 dB maximum resonant peak)

• Transverse Sensitivity Less than 5% of axial

• Construction Hermetically sealed 316L Stainless Steel

• Connector 3-pin MIL-C-5015 top-exit

Industrial Applications

The 330425-01-05 Accelerometer is indispensable for industrial assets that generate high-frequency energy or operate in environments prone to signal saturation. Key use cases include:

• High-Speed Gearboxes Tracking gear tooth mesh frequencies and detecting early-stage spalling or cracking in high-ratio transmission units.

• Steam and Gas Turbines Monitoring absolute casing vibration to identify structural resonance and aerodynamic instabilities.

• Reciprocating Compressors Analyzing rod drop and frame vibration where high-impact mechanical forces require a wide dynamic range.

• Bearing Housing Analysis Detecting the high-frequency "ringing" associated with rolling element bearing failure in heavy-duty motors and pumps.

• Hazardous Process Zones Deploying reliable vibration monitoring in explosive atmospheres typical of oil refineries and chemical plants, supported by its global certifications.