Product Overview

The 330500-00-01 Velomitor is a high-precision seismic transducer manufactured by Bently Nevada, specifically designed for measuring absolute casing vibration on rotating machinery. Unlike traditional moving-coil velocity sensors, this device utilizes an internal piezoelectric ceramic element coupled with integrated solid-state electronics to convert acceleration into a velocity signal. This "piezo-velocity" design eliminates internal moving parts, significantly reducing mechanical wear and susceptibility to "sticking," which ensures superior reliability and a longer service life in heavy industrial environments.

Key Technical Characteristics and Hardware Parameters

The 330500-00-01 is engineered to provide stable, low-noise measurements across a broad frequency spectrum. Its 316L stainless steel housing is hermetically sealed to withstand corrosive atmospheres and high-humidity conditions.

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

• Frequency Response 4.5 Hz to 5,000 Hz (270 to 300,000 cpm) ±3.0 dB

• Velocity Range 1,270 mm/s (50 in/s) peak

• Mounting Thread 1/2-20 UNF (Option -00)

• Agency Approvals CSA/NRTL/C (Class I, Div 2, Groups A-D) (Option -01)

• Shock Survivability 49,000 m/s² (5,000 g) peak maximum

• Transverse Sensitivity Less than 5% of axial sensitivity

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

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

Industrial Applications and Operational Benefits

As a core component of Turbine Supervisory Instrumentation (TSI), the 330500-00-01 is essential for detecting rotor-generated malfunctions that manifest as structural vibration. Its omnidirectional mounting capability allows it to be installed vertically, horizontally, or at any angle without a loss in accuracy.

• Bearing Housing Monitoring Captures vibration signals directly from the machine structure to identify unbalance, misalignment, and mechanical looseness.

• Balance of Plant (BoP) Equipment Ideal for monitoring motors, pumps, blowers, and fans where casing-mounted seismic sensors are more practical than proximity probes.

• Predictive Maintenance Provides the necessary data for 3500/42M or 1900/65A monitors to facilitate early fault detection and avoid catastrophic machinery failure.

• Corrosive Environments The 316L stainless steel enclosure ensures long-term integrity in oil and gas, petrochemical, and power generation facilities.

By deploying the 330500-00-01, operators gain a robust hardware safety layer that supports condition-based maintenance strategies and enhances overall machinery availability.