Product Overview

The Bently Nevada 330525-01 is a premium Velomitor XA (eXtended Application) seismic sensor designed for precision vibration monitoring of industrial rotating assets. Utilizing advanced piezoelectric ceramic shear-mode technology, this sensor measures absolute casing vibration by converting mechanical motion into a standardized electrical velocity signal. Unlike standard sensors, the 330525-01 is specifically engineered for "extended applications," offering enhanced durability and signal stability. It serves as a critical interface for Turbine Supervisory Instrumentation (TSI), providing the high-fidelity data necessary to identify early-stage mechanical faults before they escalate into costly equipment failures.

Key Technical Characteristics and Hardware Parameters

The Velomitor XA is distinguished by its internal signal conditioning and ruggedized build, allowing for direct connection to monitoring racks without external proximitor sensors.

• Model Number: 330525-01

• Transducer Type: Piezoelectric Ceramic Shear-Mode

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

• Frequency Response: 4.5 Hz to 2,000 Hz (270 to 120,000 cpm) ±3.0 dB

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

• Amplitude Linearity: ±2% up to 152 mm/s (6 in/s) peak

• Enclosure Rating: IP67 / NEMA 4X (Hermetically sealed)

• Housing Material: 316L Stainless Steel

• Temperature Range: -55°C to +121°C (-67°F to +250°F)

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

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

Industrial Applications and Operational Use Cases

The 330525-01 Velomitor XA is the industry standard for monitoring the casing vibration of medium and high-speed machinery where rolling-element bearings are common.

• Industrial Gas Turbines: Measuring absolute vibration on bearing housings to track unbalance and aerodynamic instability.

• Centrifugal Air Compressors: Continuous monitoring of casing vibration to ensure the integrity of high-speed impellers and gear trains.

• Electric Motors and Pumps: Identifying bearing wear, stator looseness, and mechanical misalignment in balance-of-plant (BoP) equipment.

• Harsh Environment Monitoring: Deployed in offshore platforms and chemical refineries where 316L stainless steel and hermetic sealing are required for corrosion resistance.

• Predictive Maintenance Integration: Fully compatible with Bently Nevada 3500/42M or 1900/65A monitors to provide automated alarm and machinery shutdown logic.