Product Overview

The Bently Nevada 330500-05-01 is a high-performance Velomitor Piezo-velocity Sensor engineered for the precise measurement of absolute casing vibration. Unlike traditional moving-coil velocity sensors that are prone to mechanical wear, this solid-state transducer utilizes a piezoelectric ceramic element with an internal electronic integrator. This advanced architecture converts acceleration into a high-fidelity velocity signal, providing a more reliable and durable solution for monitoring bearing housings, machine casings, and structural components. Its hermetically sealed design is optimized for the rigorous demands of Turbine Supervisory Instrumentation (TSI), delivering stable data for the detection of rotor unbalance, shaft misalignment, and mechanical looseness.

Key Technical Characteristics and Hardware Parameters

The 330500-05-01 is built to provide consistent signal response across a wide frequency spectrum while maintaining resilience in high-stress industrial environments.

• Model Number 330500-05-01

• Transducer Type Piezo-velocity (Internal solid-state integration)

• 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 -05)

• Agency Approvals CSA/NRTL/C (Class I, Div 1) Explosion-proof / Flameproof (Option -01)

• Temperature Range -51°C to +121°C (-60°F to +250°F)

• Housing Material 316L Stainless Steel

• Connector Type 2-pin MIL-C-5015 top-exit interface

• Shock Survivability 49,000 $m/s^2$ (5,000 g) peak maximum

Industrial Applications and Operational Benefits

Designed for versatility, the 330500-05-01 Velomitor can be mounted in any orientation—vertical, horizontal, or at a specific angle—without compromising signal accuracy. This makes it a preferred choice for complex machinery geometries in hazardous process zones.

• Centrifugal Compressors Continuous monitoring of absolute casing vibration to identify aerodynamic instabilities.

• Steam and Gas Turbines Detecting rotor-originated faults transmitted through bearing housings in power generation assets.

• Balance-of-Plant (BoP) Equipment Protecting large pumps, motors, and fans where traditional proximity probes may not be feasible.

• Hazardous Environments Utilizing its explosion-proof certification (Option -01) to provide safe monitoring in oil, gas, and chemical processing facilities.

By integrating the 330500-05-01 with Bently Nevada 3500/42M or 1900/65A monitoring systems, plant operators can establish a robust predictive maintenance strategy. The sensor's ability to provide stable data over time ensures that maintenance schedules are optimized based on actual machinery health, preventing unplanned downtime and protecting high-value capital equipment.