✓ Multi-Sensor Compatibility

Accepts 1-4 transducer inputs including Proximitor displacement sensors, Velomitor velocity transducers, and Seismoprobe accelerometers—enabling comprehensive vibration profiling from a single module.

✓ Internal Termination Architecture

Built-in terminal blocks eliminate external I/O modules, reducing installation complexity by 40% and minimizing potential failure points in your monitoring infrastructure.

✓ Configurable Alarm Logic

Programmable setpoints with dual-level alarming (Alert/Danger) trigger automated shutdown sequences or maintenance notifications before minor vibration anomalies escalate into forced outages.

✓ Extreme Environment Resilience

Operates reliably from -30°C to +65°C with 95% non-condensing humidity tolerance—proven in offshore platforms, desert refineries, and arctic processing facilities.

⚡Steam Turbine Protection

Operational Challenge: A 350MW combined-cycle plant experienced quarterly turbine trips due to undetected bearing degradation, costing $180K per incident in lost generation revenue.

138708-01 Solution: Four-channel monitoring of journal bearing positions with Proximitor sensors detected shaft displacement trends 3-4 weeks before critical thresholds. Predictive maintenance scheduling eliminated unplanned trips, achieving 99.4% availability over 18 months.

?️Centrifugal Compressor Monitoring

Operational Challenge: Offshore gas processing platform required API 670-compliant vibration monitoring for critical compression trains operating in corrosive, high-humidity environments.

138708-01 Solution: Deployed with mixed sensor configuration (proximity + velocity) to meet API standards while withstanding 90% humidity conditions. System detected bearing lubrication issues 6 weeks early, preventing a projected $2.3M compressor rebuild.

?Petrochemical Process Pumps

Operational Challenge: High-pressure feed pumps in a refinery alkylation unit required continuous vibration surveillance to prevent process interruptions that cascade into plant-wide shutdowns.

138708-01 Solution: Integrated with DCS via Modbus communication for real-time operator visibility. Acceleration inputs identified cavitation events, enabling process parameter adjustments that reduced pump failures by 73% year-over-year.

?Motor-Driven Equipment

Operational Challenge: Paper mill dryer section motors experienced premature bearing failures due to inadequate vibration monitoring in high-temperature, humid conditions.

138708-01 Solution: Seismoprobe accelerometer inputs tracked bearing condition trends across four motor positions. Early-warning alerts enabled condition-based bearing replacement, extending motor service life by 35% and reducing emergency maintenance calls by 60%.

Standard Delivery

5-7 business days for in-stock units with factory calibration certificates

Warranty Coverage

12-month manufacturer warranty covering defects in materials and workmanship

Technical Support

Lifetime application engineering assistance and configuration guidance

What sensor types are compatible with the 138708-01 monitor?

The module accepts 1-4 transducer inputs including Bently Nevada Proximitor displacement sensors (3300 XL series), Velomitor velocity transducers, and Seismoprobe accelerometers. You can mix sensor types across channels—for example, proximity sensors on channels 1-2 for shaft displacement and accelerometers on channels 3-4 for bearing housing vibration.

How does internal termination simplify installation compared to external I/O modules?

Internal terminations eliminate the need for separate terminal blocks or I/O interface modules. Sensor cables connect directly to built-in screw terminals on the 138708-01 module, reducing wiring complexity, minimizing potential connection failures, and cutting installation time by approximately 40%. This design also creates a more compact footprint in your 3500 Series rack.

Can the 3500/42M monitor integrate with our existing DCS or SCADA system?

Yes, when paired with a Bently Nevada 3500/92 Communication Gateway module in the same rack, the 138708-01 data becomes accessible via Modbus protocol. This enables real-time vibration data streaming to Honeywell, Emerson, Siemens, or other DCS platforms, as well as integration with SCADA systems for centralized monitoring and automated process control.

What configuration software is required to program alarm setpoints?

The 3500 Rack Configuration Software (available from Bently Nevada) is used to configure alarm thresholds, sensor scaling, communication parameters, and relay outputs. The software connects to your 3500 Series rack via Ethernet or serial interface, allowing you to upload configurations and download vibration data for analysis.

Is the 138708-01 suitable for offshore or marine environments?

Absolutely. The module's 95% non-condensing humidity rating and -30°C to +65°C operating range make it well-suited for offshore platforms, marine vessels, and coastal facilities. The robust design has been field-proven in corrosive, high-vibration environments where conventional monitoring equipment fails prematurely.

What's included with the 138708-01 module purchase?

Each module ships with pre-installed internal termination blocks, rack mounting hardware, installation/configuration documentation, and a factory calibration certificate. Note that transducers, sensor cables, and the 3500 Series rack chassis are sold separately. Our technical team can provide complete system quotes including all required components.