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BENTLY 125388-01H Vibration Transmitter
Product Overview
The BENTLY 125388-01H is a high-precision vibration transmitter engineered for continuous monitoring of rotating equipment in industrial automation systems. As a critical component of Bently Nevada’s machinery protection portfolio, this transmitter converts mechanical vibrations into standardized electrical signals (4–20 mA) for analysis by monitoring systems, enabling predictive maintenance and fault detection in turbines, compressors, and generators. The 125388-01H integrates seamlessly with BENTLY’s 3500 Series monitoring platforms, delivering reliable vibration amplitude and velocity measurements to support operational safety and efficiency across oil & gas, power generation, and manufacturing sectors.
Featuring a rugged piezoelectric design, the BENTLY 125388-01H captures vibration data with ±1% accuracy across a wide range (0.1–100 in./sec velocity, 0–500 mils displacement), ensuring precise diagnostics even in high-vibration environments. Its hermetically sealed enclosure (IP67-rated) and stainless-steel construction protect against dust, moisture, and corrosive elements, making it suitable for harsh industrial settings. The transmitter’s loop-powered design (24 V DC) and built-in signal conditioning minimize noise interference, while its compatibility with standard 2-wire installations simplifies integration into existing monitoring networks.
In automation ecosystems, the 125388-01H serves as a front-end sensor for vibration analysis, feeding real-time data to monitoring systems for trend analysis and alarm activation. Its wide frequency response (10–10,000 Hz) enables detection of various fault signatures, from bearing wear to mechanical imbalance. By providing actionable insights into equipment health, this transmitter helps reduce unplanned downtime, extend component lifespan, and optimize maintenance schedules in mission-critical applications.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 125388-01H |
| Manufacturer | Bently Nevada |
| Product Type | Vibration Transmitter |
| Sensing Principle | Piezoelectric ceramic |
| Measurement Range | Velocity: 0.1–100 in./sec (2.54–2540 mm/sec); Displacement: 0–500 mils (0–12.7 mm) |
| Frequency Response | 10–10,000 Hz |
| Output Signal | 4–20 mA (loop-powered) |
| Sensitivity | 100 mV/(in./sec) (4 mV/(mm/sec)) |
| Physical Dimensions | 38 mm (diameter) × 76 mm (length) |
| Weight | 0.45 kg |
| Operating Temperature | -40°C to +121°C |
| Mounting | Threaded mounting (1/2-20 UNF or M14×1.5) |
| Environmental Rating | IP67, NEMA 4X |
| Shock Resistance | 1000 g (11 ms) |
Key Features and Advantages
High-Accuracy Measurement Capability: The 125388-01H provides precise vibration velocity and displacement readings with ±1% accuracy, enabling early detection of subtle mechanical issues. Its wide frequency response captures both low-frequency imbalance and high-frequency bearing defects, supporting comprehensive machinery health analysis.
Rugged Industrial Design: The transmitter’s hermetically sealed stainless-steel housing and IP67 rating protect against harsh environmental factors, including water immersion, dust, and corrosive gases. This durability ensures reliable performance in offshore platforms, refineries, and other challenging industrial environments.
Easy System Integration: With a standard threaded mount and 2-wire loop-powered connectivity, the 125388-01H simplifies installation in existing monitoring systems. Its compatibility with BENTLY’s 3500 Series and third-party data acquisition systems reduces integration complexity and costs.
Low Noise and High Reliability: The built-in signal conditioning and loop-powered design minimize electromagnetic interference, ensuring clean vibration signals. The transmitter’s piezoelectric design eliminates moving parts, reducing wear and enhancing long-term reliability without frequent maintenance.
Wide Operational Range: Capable of operating from -40°C to +121°C, the 125388-01H suits both ambient and high-temperature applications, such as turbine casings and engine compartments. Its shock resistance (1000 g) further ensures durability in high-impact environments.
Application Areas
The BENTLY 125388-01H is essential for vibration monitoring in industries where equipment reliability is critical:
- Oil & Gas: Monitors compressors, pumps, and turbines in refineries, pipelines, and offshore platforms to detect misalignment, bearing wear, or cavitation, preventing costly shutdowns and ensuring operational safety.
- Power Generation: Installed on steam turbines, generators, and auxiliary equipment in thermal and nuclear plants to maintain grid stability, optimize energy production, and prevent catastrophic failures.
- Manufacturing: Used in high-speed rotating machinery like motors, fans, and conveyor systems to ensure production continuity and product quality in automotive, chemical, and food processing facilities.
- Mining and Metals: Deployed on crushers, mills, and ventilation systems to monitor equipment health in harsh mining environments, reducing downtime and maintenance costs through predictive diagnostics.
Specific applications include:
- Bearing Condition Monitoring: Detects early signs of bearing degradation by analyzing vibration waveforms, allowing proactive replacement before catastrophic failure.
- Imbalance and Misalignment Detection: Identifies rotational issues in turbines and pumps, enabling timely corrective actions to reduce mechanical stress and extend equipment lifespan.
- Structural Vibration Analysis: Measures casing vibrations in reciprocating engines to assess structural integrity and prevent fatigue failures in critical components.
Related Products
- BENTLY 3300 XL 8 mm Proximity Probe: A complementary displacement sensor for measuring shaft position, often used alongside the 125388-01H for comprehensive vibration and displacement analysis.
- BENTLY 3500/42M Vibration Monitor: Processes signals from the 125388-01H to provide real-time vibration analysis, alarm triggering, and data trending for machinery protection.
- BENTLY 3500/22M Keyphasor Module: Supplies rotational reference signals for phase-locked vibration analysis, enhancing the 125388-01H’s diagnostic capabilities.
- BENTLY 123M4610 Velocity Transducer: A similar velocity sensor with slightly different measurement ranges, suitable for applications requiring alternative configuration options.
- BENTLY 330500 Proximity Probe System: A high-precision displacement sensor suite compatible with the 125388-01H for combined velocity and displacement monitoring in complex systems.
- BENTLY 3500/05 Rack Enclosure: Houses vibration monitors and related modules for centralized monitoring with the 125388-01H in industrial setups.
- BENTLY 1900/65A Vibration Monitor: A compact monitoring solution for basic vibration analysis, ideal for integrating the 125388-01H in smaller-scale automation systems.
Installation and Maintenance
Pre-installation Preparations:
Before installing the BENTLY 125388-01H, verify the mounting surface is flat, clean, and free of debris. Use a torque wrench to secure the transmitter to the equipment (recommended torque: 11–14 N·m) to ensure optimal vibration transfer. Route shielded cables away from high-voltage lines to minimize electromagnetic interference, and connect the transmitter to the monitoring system using a 2-wire configuration with 24 V DC power. Calibrate the system with a known vibration source to ensure measurement accuracy before commissioning.
Before installing the BENTLY 125388-01H, verify the mounting surface is flat, clean, and free of debris. Use a torque wrench to secure the transmitter to the equipment (recommended torque: 11–14 N·m) to ensure optimal vibration transfer. Route shielded cables away from high-voltage lines to minimize electromagnetic interference, and connect the transmitter to the monitoring system using a 2-wire configuration with 24 V DC power. Calibrate the system with a known vibration source to ensure measurement accuracy before commissioning.
Maintenance Suggestions:
- Routine Inspections: Perform quarterly visual checks for loose connections, corrosion, or physical damage to the 125388-01H and its cabling. Use a handheld vibrometer to compare readings with the transmitter’s output for calibration verification and identify any deviations from normal operation.
- Environmental Maintenance: Regularly clean the transmitter’s housing using a dry cloth or compressed air to remove dust and debris, especially in dusty or dirty environments. Avoid using solvents that may damage the enclosure or sealing components.
- Periodic Calibration: Annually calibrate the 125388-01H using a vibration shaker table to maintain measurement accuracy. Document calibration results and adjust as needed to ensure compliance with industry standards and operational requirements.
- Spare Parts Management: Store spare 125388-01H transmitters in a temperature-controlled environment (10–30°C) with low humidity to preserve performance. Rotate inventory periodically to ensure shelf-life viability for urgent replacements.
Product Guarantee
Our company provides a 12-month quality warranty for the BENTLY 125388-01H, covering hardware defects under normal use. In the event of abnormal performance or functional failure, we offer prompt replacement services to minimize downtime. For legacy or urgent requirements, our global supply chain network ensures rapid delivery of the 125388-01H and related spare parts. Our technical support team is available 24/7 to assist with installation, calibration, and troubleshooting, ensuring reliable operation to safeguard your industrial systems and maintain continuous productivity.
For inquiries, contact us via WhatsApp at +86 18859254943 or email at sales@ygplc.com.
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