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BENTLY 128276-011 Accelerometer Transmitter
Product Overview：BENTLY 128276-011
The BENTLY 128276-011 is a high-performance accelerometer transmitter designed for continuous vibration monitoring in industrial automation systems. Engineered as a critical component of Bently Nevada’s machinery protection portfolio, this transmitter converts mechanical acceleration into standardized electrical signals, enabling real-time analysis of rotating equipment health in turbines, compressors, and generators. As part of BENTLY’s advanced sensor solutions, the 128276-011 integrates seamlessly with the 3500 Series monitoring systems, delivering precise acceleration data to support predictive maintenance and fault detection across oil & gas, power generation, and manufacturing sectors.
Featuring a rugged piezoelectric design, the BENTLY 128276-011 measures acceleration ranges from ±50 g to ±500 g with ±1% accuracy, ensuring reliable detection of vibration anomalies. Its hermetically sealed enclosure (IP67-rated) and stainless-steel construction protect against harsh environmental factors, including moisture, dust, and corrosive gases, making it suitable for demanding industrial environments. The transmitter’s 4–20 mA output signal and built-in signal conditioning minimize noise interference, while its compatibility with two-wire loop-powered installations simplifies integration into existing monitoring networks.
In automation ecosystems, the 128276-011 serves as a front-end sensor for vibration analysis, feeding acceleration data to monitoring systems for trend analysis and alarm activation. Its wide frequency response (0.5–10,000 Hz) captures both low-frequency structural vibrations and high-frequency bearing defects, enabling comprehensive machinery health assessment. By providing actionable insights into equipment condition, this transmitter helps reduce unplanned downtime, optimize maintenance schedules, and extend component lifespan in mission-critical applications.
Technical Specifications：BENTLY 128276-011
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 128276-011 |
| Manufacturer | Bently Nevada |
| Product Type | Accelerometer Transmitter |
| Sensing Element | Piezoelectric ceramic |
| Measurement Range | ±50 g to ±500 g (selectable) |
| Frequency Response | 0.5–10,000 Hz |
| Output Signal | 4–20 mA (two-wire loop-powered) |
| Sensitivity | 100 mV/g (configurable) |
| 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：BENTLY 128276-011
High-Accuracy Acceleration Measurement: The 128276-011 provides precise acceleration readings with ±1% accuracy, enabling early detection of subtle mechanical issues. Its selectable measurement range (±50 g to ±500 g) adapts to diverse equipment types, from low-vibration turbines to high-impact industrial machinery.
Rugged Industrial Design: The transmitter’s hermetically sealed stainless-steel housing and IP67 rating protect against water immersion, dust, and corrosive elements, ensuring reliable performance in offshore platforms, refineries, and other harsh environments. Its shock resistance (1000 g) further ensures durability in high-impact scenarios.
Easy System Integration: With a standard threaded mount and two-wire 4–20 mA output, the 128276-011 simplifies installation in existing monitoring systems. It integrates seamlessly with BENTLY’s 3500 Series modules and third-party data acquisition systems, reducing integration complexity and costs.
Low Noise and High Reliability: Built-in signal conditioning and a low-output impedance design minimize electromagnetic interference, ensuring clean vibration signals. The piezoelectric sensor design eliminates moving parts, reducing wear and enhancing long-term reliability with minimal maintenance.
Wide Operational Flexibility: Capable of operating from -40°C to +121°C, the 128276-011 suits both ambient and high-temperature applications, such as turbine casings, engine compartments, and industrial processing equipment.
Application Areas：BENTLY 128276-011
The BENTLY 128276-011 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 bearing wear, misalignment, or cavitation, preventing costly shutdowns and safety hazards.
- Power Generation: Installed on steam turbines, generators, and auxiliary equipment in thermal and nuclear plants to maintain grid stability, optimize energy production, and ensure compliance with safety standards.
- Manufacturing: Used in high-speed rotating machinery like motors, fans, and conveyor systems to ensure production continuity, reduce mechanical stress, and maintain 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 proactive fault detection.
Specific applications include:
- Bearing Condition Monitoring: Detects early signs of bearing degradation by analyzing acceleration waveforms, allowing timely replacement before catastrophic failure.
- Structural Vibration Analysis: Measures casing vibrations in reciprocating engines and rotating machinery to assess structural integrity and prevent fatigue failures.
- Balancing and Alignment Checks: Provides acceleration data for identifying rotational imbalance or misalignment, enabling corrective actions to optimize equipment performance.
Related Products：BENTLY 128276-011
- BENTLY 3300 XL 8 mm Proximity Probe: A complementary displacement sensor for measuring shaft position, often used alongside the 128276-011 for comprehensive vibration analysis.
- BENTLY 3500/42M Vibration Monitor: Processes acceleration signals from the 128276-011 to provide real-time vibration analysis, alarm triggering, and data trending.
- BENTLY 3500/22M Keyphasor Module: Supplies rotational reference signals for phase-locked vibration analysis, enhancing the 128276-011’s diagnostic capabilities.
- BENTLY 123M4610 Velocity Transducer: A velocity-measuring counterpart to the 128276-011, offering combined velocity and acceleration monitoring for comprehensive machinery health assessment.
- BENTLY 3500/05 Rack Enclosure: Houses vibration monitoring modules compatible with the 128276-011, providing a centralized platform for data acquisition and analysis.
- BENTLY 330500 Proximity Probe System: A high-precision displacement sensor suite that integrates with the 128276-011 for multi-parameter vibration monitoring.
Installation and Maintenance：BENTLY 128276-011
Pre-installation Preparations:
Before installing the BENTLY 128276-011, 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 two-wire configuration. Calibrate the system with a known vibration source to ensure measurement accuracy and verify output signal integrity.
Before installing the BENTLY 128276-011, 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 two-wire configuration. Calibrate the system with a known vibration source to ensure measurement accuracy and verify output signal integrity.
Maintenance Suggestions:
- Routine Inspections: Perform quarterly visual checks for loose connections, corrosion, or physical damage to the transmitter housing. Use a handheld vibrometer to compare 128276-011 readings with reference sensors and ensure calibration accuracy.
- Environmental Management: Clean the transmitter’s enclosure periodically 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 housing or seals.
- Periodic Calibration: Annually calibrate the 128276-011 using a vibration shaker table and precision measurement equipment to maintain accuracy. Document calibration results for compliance and maintenance records.
- Spare Parts Management: Store spare 128276-011 transmitters in a temperature-controlled environment (10–30°C) with low humidity to preserve performance. Test spares periodically to ensure functionality during emergency replacements.
Product Guarantee：BENTLY 128276-011
Our company provides a 12-month quality warranty for the BENTLY 128276-011, 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 128276-011 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.
For inquiries, contact us via WhatsApp at +86 18859254943 or email at sales@ygplc.com.
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