Product Overview

The Bently Nevada 330525-00 is an "Extended Application" (XA) version of the industry-standard piezo-velocity sensor, engineered specifically for high-reliability vibration monitoring in severe industrial climates. This ruggedized transducer utilizes internal piezoelectric crystals to measure absolute casing vibration, converting high-frequency acceleration signals into a stable velocity output. Encased in a 316L stainless steel housing, the 330525-00 offers superior resistance to chemical corrosion and mechanical stress compared to standard sensors. It is designed to bridge the gap between standard environmental monitoring and extreme-duty requirements, providing a robust solution for Turbine Supervisory Instrumentation (TSI) where traditional sensors might fail.

Hardware Parameters and Key Technical Characteristics

The Velomitor XA is characterized by its high-density construction and specialized electrical interface, ensuring consistent data acquisition in wet or dusty environments.

• Model Number 330525-00

• Sensor Type Piezoelectric Velocity Transducer

• Housing Material 316L Stainless Steel (Corrosion Resistant)

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

• Frequency Response 4.5 Hz to 5 kHz (±3.0 dB)

• Velocity Range 1270 mm/s (50 in/s) peak

• Mounting Thread 1/4-28 UNF (Option -00)

• Connector Interface 2-pin Mil-C-5015 with weatherproof seal

• Environmental Rating IP65 and NEMA 4X (when used with appropriate mating cables)

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

• Excitation Voltage -24 Vdc (Current limited)

Industrial Applications and Operational Use Cases

The 330525-00 is primarily utilized for monitoring the casing vibration of rotating assets where moisture ingress or chemical exposure is a constant threat.

• Cooling Tower Fans Monitoring motor and gearbox vibration in 100% condensing humidity environments without the need for additional protective housings.

• Hydroelectric Turbines Tracking absolute vibration on guide bearings and headcovers where water spray and moisture are prevalent.

• Petrochemical Process Pumps Continuous surveillance of pump housings in outdoor locations exposed to corrosive vapors and heavy rain.

• General Purpose Steam Turbines Measuring absolute casing vibration to detect mechanical unbalance or bearing housing resonances.

• Balance of Plant (BoP) Assets Providing reliable data for motors, fans, and blowers in refineries and power generation plants where NEMA 4X protection is mandatory.

The integration of the weatherproof connector allows for a simplified installation footprint, enabling maintenance teams to achieve reliable machinery protection in space-constrained or exposed locations while maintaining full compatibility with the Bently Nevada 3500 monitoring system.