From core turbines to plant-wide auxiliary equipment: Bently Nevada fills the blind spots in rotating machinery monitoring

01Introduction

For decades, machinery protection strategies in process plants concentrated primarily on high-value rotating equipment. However, a modern industrial facility contains far more than a few critical machine trains. Cooling tower fans, heat exchanger fin fans, auxiliary pumps, blowers, motors, gearboxes, and other balance-of-plant assets may number in the hundreds or thousands. Individually, these machines may not justify a dedicated high-end protection rack. Collectively, however, their failures can create significant maintenance costs, process instability, safety exposure, and lost production.

Bently Nevada is addressing this monitoring gap through a tiered asset-health strategy. Trendmaster Pro provides scalable, permanently installed monitoring for essential equipment, while Ranger Pro wireless sensors extend coverage to dispersed, difficult-to-wire, and hazardous-area assets. Together with System 1 condition monitoring software, these technologies allow plants to expand machinery visibility beyond the central turbine hall.

02Moving Beyond a Critical-Machinery-Only Strategy

Traditional machinery protection systems are designed for assets with high failure consequences and rapidly developing fault modes. Applying the same architecture to every small pump or fan is rarely economically practical. As a result, many auxiliary machines have historically depended on periodic manual inspections. A technician may visit each asset with a portable vibration analyzer once a month or once a quarter. Although route-based data collection remains valuable, it provides only a snapshot of machine condition. Faults that develop between inspections can remain undetected, especially when staffing limitations cause routes to be delayed or shortened.

A tiered strategy assigns monitoring technology according to asset criticality, failure behavior, accessibility, and business consequence. The 3500 Series continues to protect critical machinery, while scanning and wireless solutions provide more economical condition monitoring for medium-criticality assets. This approach increases plantwide coverage without treating every machine as though it were a main turbine.

03Trendmaster Pro Brings Scalable Monitoring to Essential Assets

Trendmaster Pro is designed for machines that require more visibility than periodic manual inspection but do not necessarily require a dedicated continuous protection rack. It uses permanently mounted transducers, Transducer Interface Modules, shared sensor buses, and Dynamic Scanning Modules to create a distributed monitoring network.

A major advantage of the architecture is its ability to connect numerous measurement points through a shared cabling infrastructure. Instead of running an individual cable from every sensor to a central rack, multiple field devices can communicate over a common sensor bus. This can substantially reduce cable quantities, installation complexity, and the amount of centralized monitoring hardware required for high-density deployments.

The system supports more than basic overall vibration measurements. Depending on the selected transducers and interface modules, Trendmaster Pro can acquire acceleration, velocity, displacement, temperature, pressure, speed, and process-variable signals. Typical applications include cooling tower fans, fin fans, blowers, pumps, motors, and fixed equipment. Trendmaster Pro is also suitable for selected hazardous-area installations when the system is engineered with the appropriate intrinsically safe barriers and approved components.

04Ranger Pro Extends Monitoring Reach

Some machines are too dispersed, inaccessible, or expensive to connect through conventional cable networks. In these situations, the Bently Nevada Ranger Pro wireless condition monitoring sensor offers another route to plantwide asset visibility.

Ranger Pro combines vibration and temperature sensing with an industrial wireless network. Sensors can be deployed without installing signal cables between every machine and the monitoring system, making the technology particularly attractive for brownfield plants where new cable trays or underground conduits would be disruptive and costly.

The sensor can be configured for uniaxial or triaxial vibration measurement. In addition to overall values, it can provide time waveforms, frequency spectra, acceleration, velocity, temperature, and demodulated information used for rolling-element bearing analysis. Data collection can be scheduled at defined intervals or initiated according to machine state and alarm severity.

Hazardous-area capability is another important differentiator. Ranger Pro configurations are available with approvals for demanding locations, including Zone 0 and Class I, Division 1 applications. This makes wireless monitoring relevant to machines located in areas where conventional wiring work requires extensive engineering, cable protection, and installation controls.

Wireless technology does introduce design considerations. Battery condition, gateway placement, radio coverage, measurement frequency, network architecture, and surrounding obstacles must be evaluated during project planning. Ranger Pro should therefore be selected as part of an engineered monitoring strategy rather than treated as a universal replacement for wired systems.

05System 1 Creates a Unified Plantwide Machinery View

Installing more sensors delivers value only when the resulting information can be interpreted and converted into maintenance action. Bently Nevada addresses this requirement by connecting its monitoring portfolio to System 1 condition monitoring software.

Data from critical machinery protection systems, Trendmaster Pro networks, Ranger Pro wireless sensors, vbOnline Pro devices, and portable data collectors can be organized within a common machinery-health environment. This allows reliability personnel to review alarms, trends, spectra, waveforms, machine states, and historical behavior without maintaining isolated databases for every monitoring technology.

The unified architecture also supports more consistent maintenance workflows. An increase in fan vibration can be compared with temperature, operating load, previous maintenance records, and historical spectral patterns. A pump showing elevated bearing acceleration can be prioritized before the defect progresses into secondary shaft, seal, or coupling damage. Maintenance teams can therefore move from calendar-based servicing toward condition-based intervention.

Plantwide monitoring does not mean collecting maximum-resolution data from every machine at all times. The more effective approach is to match data density and acquisition frequency to the risk associated with each asset. Critical equipment receives continuous protection, essential auxiliary machines receive automated scanning or frequent wireless measurements, and low-consequence equipment may remain on manual inspection routes.

06Conclusion

The next stage of rotating machinery monitoring is not limited to adding more channels around major turbines. It involves extending reliable condition information across the entire production facility.

Bently Nevada’s 3500 Series, Trendmaster Pro, Ranger Pro, and the System 1 platform perform different but complementary functions. The 3500 Series provides high-speed protection for critical machinery. Trendmaster Pro offers scalable wired monitoring for essential assets, while Ranger Pro introduces flexible wireless coverage for dispersed and hazardous-area equipment. System 1 brings these information sources together for analysis and maintenance decision-making.

07Suggested Products

A selection of available Bently Nevada, Allen-Bradley, and other industrial automation models.