Product Overview

The Bently Nevada 190501-08-00-00 is a specialized Velomitor CT (Cooling Tower) Velocity Transducer designed specifically for low-speed rotating machinery. Unlike standard seismic sensors, the Velomitor CT is engineered to monitor vibration on equipment operating at speeds as low as 90 RPM (1.5 Hz). This makes it the primary solution for detecting mechanical issues in cooling tower fans, air-cooled heat exchangers, and large slow-speed gearboxes.

This transducer utilizes a piezo-velocity sensor design that converts vibration velocity into a proportional voltage signal. By integrating the sensing element and the internal electronics within a robust, hermetically sealed housing, the 190501-08-00-00 provides high-fidelity data to monitoring systems like the Bently Nevada 3500 series. Its focus on low-frequency sensitivity allows for the early detection of fan blade imbalances, gear mesh issues, and structural resonance that traditional accelerometers might miss.

Technical Characteristics and Performance

• Low-Frequency Optimization Designed specifically for slow-speed machinery, maintaining accurate frequency response from 1.5 Hz to 1.0 kHz (90 to 60,000 CPM).

• Piezo-Velocity Sensing Combines the ruggedness of an accelerometer with the direct velocity output required for rotating machinery diagnostics, eliminating the need for external integration.

• Dual-Shielded Protection The 190501-08-00-00 utilizes a double-shielded construction to maximize EMI/RFI immunity, ensuring signal purity when routed near variable frequency drives (VFDs) or heavy electrical motors.

• Corrosive Environment Durability Encased in a 316L stainless steel housing with an oil-resistant jacket, the unit is rated for the high-humidity and corrosive atmospheres common in cooling tower basins.

• High-Temperature Tolerance Operates reliably in ambient temperatures up to 150°C, providing long-term stability in extreme industrial heat.

• MIL-C-5015 Interface Features a rugged 2-pin MIL-style connector for secure, vibration-proof electrical coupling in high-vibration zones.

Technical Specifications

• Manufacturer Bently Nevada (Baker Hughes)

• Model Number 190501-08-00-00

• Transducer Type Piezo-velocity

• Sensitivity 3.94 mV/mm/s (100 mV/in/s) ±10%

• Frequency Range 1.5 Hz to 1.0 kHz (±3 dB)

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

• Mounting Thread 1/2-20 UNF (Standard for 08 option)

• Connector Type 2-pin MIL-C-5015

• Case Material 316L Stainless Steel

• Weight 0.2 kg

• Origin USA

Industrial Applications

• Cooling Tower Fans Monitoring for imbalance, pitch errors, and motor/gearbox health.

• Air-Cooled Heat Exchangers (Fin-Fans) Detecting structural vibration and bearing wear in large-diameter fan assemblies.

• Slow-Speed Gearboxes Identifying gear tooth fatigue and shaft misalignment in high-torque industrial drives.

• Hydroelectric Turbines General low-frequency vibration monitoring for slow-turning turbine shafts and bearings.