190501-12-00-04 Bently Nevada Velomitor CT Low-Frequency Velocity Transducer

Product Overview

The Bently Nevada 190501-12-00-04 is a specialized Velomitor CT (Cooling Tower) velocity transducer engineered for the seismic monitoring of low-speed rotating machinery. This high-precision sensor is specifically designed to capture casing vibration on air-cooled heat exchangers and cooling tower fan assemblies that operate at speeds as low as 90 rpm. By converting mechanical motion into a velocity-proportional electrical signal, it provides the essential data required for Turbine Supervisory Instrumentation (TSI) and predictive maintenance programs.

Unlike standard vibration sensors, the 190501-12-00-04 is tuned to detect the subtle low-frequency signatures associated with large fan blades while simultaneously monitoring higher-frequency anomalies from gear reducers and drive motors. This dual-capability ensures comprehensive protection against mechanical degradation.

Core Functions and Machine Protection

The primary role of the Velomitor CT is the early identification of common mechanical faults that can lead to catastrophic failure in cooling infrastructure.

• Fault Detection: It effectively identifies rotor unbalance, shaft misalignment, and mechanical looseness by tracking increases in vibration amplitude at specific frequencies.

• Seismic Monitoring: The transducer measures the vibration transmitted to the machine casing or bearing housing, making it ideal for large machinery where internal shaft measurements are impractical.

• Signal Integrity: The internal piezo-velocity circuitry filters out background noise to preserve the integrity of low-frequency data, which is critical for equipment rotating between 100 and 300 rpm.

Technical Characteristics

The 190501-12-00-04 is built to sustain long-term operation in the saturated and corrosive environments found in industrial cooling cells.

• Frequency Range: Optimized for low-speed detection starting at 1.5 Hz (90 cpm).

• Robust Construction: Features a hermetically sealed housing designed for high-humidity and chemically active areas.

• Installation Accuracy: Designed for stud mounting on bearing housings to ensure maximum frequency response and to prevent the generation of false spectral artifacts.

• Solid-State Reliability: Utilizing piezoelectric technology, this transducer has no moving parts to wear out, providing a significant advantage over legacy moving-coil velocity pickups.

Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Number: 190501-12-00-04

• Transducer Type: Piezo-velocity (Velomitor CT)

• Application Speed: ≥ 90 rpm (Typical 100–300 rpm)

• System Integration: Turbine Supervisory Instrumentation (TSI)

• Housing Material: Stainless Steel

• Net Weight: 0.06 kg (Sensor only)

• Shipping Dimensions: 3.6 cm x 13.4 cm x 13.7 cm

• Origin: USA