Product Overview

The Bently Nevada 190501-00-00-05 is a specialized "Cooling Tower" (CT) Velomitor, engineered specifically for the absolute vibration monitoring of slow-moving industrial machinery. While standard velocity sensors often lose accuracy at low rotational speeds, the 190501-00-00-05 is optimized to detect vibration frequencies corresponding to machinery running as slow as 90 RPM. This piezoelectric sensor converts mechanical casing movement into a proportional electrical signal, providing essential data for protecting large-scale fan assemblies and air-cooled heat exchangers. By focusing on the unique low-frequency signatures of cooling tower drives, this transducer ensures that subtle mechanical imbalances or gear reducer faults are identified long before they result in catastrophic failure.

Key Technical Characteristics and Hardware Parameters

The Velomitor CT features a ruggedized internal design that enhances sensitivity at the lower end of the frequency spectrum while maintaining the durability required for outdoor, high-moisture environments.

• Model Number 190501-00-00-05

• Transducer Type Piezoelectric Velocity Sensor (Low Frequency)

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

• Frequency Response 1.5 Hz to 1.0 kHz (90 to 60,000 cpm) ±3.0 dB

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

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

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

• Agency Approvals None/Standard (Option -00)

• Connector Interface 2-pin MIL-C-5015 top-exit (Option -05)

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

• Case Material 316L Stainless Steel

• Sealing Hermetically sealed to IP67/NEMA 4X standards

Industrial Applications and Operational Use Cases

The 190501-00-00-05 is the industry benchmark for monitoring assets where low rotational speeds make traditional seismic sensors ineffective.

• Cooling Tower Fan Assemblies Detecting blade unbalance, shaft misalignment, and motor housing vibration in power plant and refinery cooling systems.

• Air-Cooled Heat Exchangers (Fin-Fans) Monitoring the low-frequency vibrations typical of large diameter fans used in chemical processing.

• Slow-Speed Speed Reducers Tracking gear mesh frequencies and bearing health in industrial gearboxes operating between 100 and 300 RPM.

• Large HVAC Blowers Providing a reliable vibration signal for predictive maintenance on massive air-handling units in commercial and industrial complexes.

• Predictive Maintenance Integration Interfacing directly with Bently Nevada 3500/42M or 2300 series monitors to trigger automated alerts and safety shutdowns based on absolute casing velocity.