Product Overview

The Bently Nevada 330500-01-01 is a high-performance Velomitor Piezo-velocity Sensor designed for the measurement of absolute casing vibration. Unlike traditional moving-coil velocity transducers, the 330500 series utilizes solid-state piezoelectric technology to convert acceleration signals into a velocity output internally. This design eliminates moving parts, effectively preventing the mechanical wear and sticking issues that often plague legacy sensors. Encased in a hermetically sealed 316L stainless steel housing, this sensor is engineered to provide precise data on rotor-generated vibrations transmitted to the bearing housing, making it a cornerstone of modern Turbine Supervisory Instrumentation (TSI).

Key Technical Characteristics

The 330500-01-01 is built for durability and precision, maintaining signal integrity across extreme temperature gradients and high-frequency ranges.

• Sensitivity: 3.94 mV/mm/s (100 mV/in/s) ±5%

• Frequency Response: 4.5 Hz to 5.0 kHz (270 to 300,000 cpm) ±3.0 dB

• Mounting Thread: 1/2-20 UNF (Option -01)

• Agency Approval: Multiple certifications including ATEX, IECEx, and CSA for hazardous areas (Option -01)

• Temperature Range: -51°C to +177°C (-60°F to +351°F)

• Enclosure Material: 316L Stainless Steel

• Orientation: Omnidirectional (can be mounted vertically, horizontally, or at any angle)

• Weight: Approximately 142 grams (5.0 oz)

• Connector Type: 2-pin MIL-C-5015 top-exit connector

Industrial Applications and Operational Benefits

The 330500-01-01 Velomitor is widely deployed across the power generation, petrochemical, and manufacturing sectors to protect critical rotating assets. Its ability to capture high-fidelity vibration data allows for the early detection of common mechanical faults:

• Turbines and Compressors: Monitoring for shaft unbalance and mechanical looseness that can lead to catastrophic failure.

• Pumps and Motors: Identifying misalignment between drive trains and driven components.

• Predictive Maintenance: Providing the stable, long-term trend data necessary for condition-based maintenance strategies.

• Harsh Environments: Reliability in extreme cold or heat ensures protection for outdoor installations in arctic or desert climates.

Because the sensor integrates seamlessly with Bently Nevada 3500/42M or 1900/65A monitors, it provides a robust solution for automated machinery protection and real-time diagnostic analysis.