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- Bently Nevada
- 200155-18-CN
- Low-Frequency Trendmaster Pro Accelerometer
- USA
- 45.7 x 17.5 mm
- 0.058 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Bently Nevada 200155-18-CN Low-Frequency Trendmaster Pro Accelerometer is a high-performance seismic vibration sensor designed for low-speed rotating machinery monitoring. It belongs to the 200155 Trendmaster Pro series, which is widely used for industrial condition monitoring and predictive maintenance applications.
This accelerometer is specifically engineered for detecting low-frequency vibration trends, making it suitable for equipment such as cooling tower fans, large blowers, pumps, and other slow-speed rotating machinery where conventional high-frequency sensors may not provide sufficient sensitivity.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Bently Nevada |
| Model | 200155-18-CN |
| Product Type | Low-Frequency Trendmaster Pro Accelerometer |
| Series | 200155 Trendmaster Pro |
| Sensor Technology | Piezoelectric shear-mode accelerometer |
| Mounting Thread | 3/8-24 to M8x1 (hex plate stud option -18) |
| Approval Code | CN (CSA / ATEX / IECEx compliant) |
| Sensitivity | ~10.2 mV/(m/s²) (≈100 mV/g) |
| Measurement Range | ±196 m/s² (±20 g) |
| Frequency Range | 1.5 Hz to 10,000 Hz |
| Settling Time | ≤ 2000 ms |
| Transverse Sensitivity | ≤ 7% |
| Housing Material | 316L Stainless Steel |
| Sealing | Hermetically sealed construction |
| Connector Type | 5-pin industrial connector (top-mounted) |
| Output Type | Voltage output (IEPE-style interface via Trendmaster system) |
| Operating Temperature | -40°C to +105°C |
| Humidity Rating | 100% condensing (non-submerged) |
| Shock Limit | Up to 5000 g peak |
| Weight | 0.058 kg |
| Dimensions | 45.7 × 17.5 mm |
Function and Working Principle
The 200155-18-CN operates by converting mechanical vibration into an electrical signal using a piezoelectric sensing element.
Key Functions
- Low-frequency vibration monitoring
- Machinery condition trending and diagnostics
- Early detection of imbalance, misalignment, and looseness
- Continuous machinery health monitoring
- Integration into predictive maintenance systems
Working Principle
When the sensor is mounted on a machine casing, mechanical vibrations cause internal stress in the piezoelectric crystal. This generates an electrical charge proportional to the vibration acceleration. The signal is then processed through the Trendmaster Pro system, enabling long-term vibration trending and fault detection.
Unlike standard accelerometers, this model is optimized for low-frequency response, making it especially effective for slow-speed rotating equipment.
Role in Machinery Condition Monitoring Systems
The 200155-18-CN is commonly used as part of Trendmaster Pro condition monitoring systems, where it provides:
- Continuous low-frequency vibration data
- Long-term trend analysis of machine health
- Early warning of mechanical degradation
- Integration into plant-wide monitoring networks
- Support for predictive maintenance strategies
It is particularly valuable in systems where multiple sensors are distributed across large industrial assets.
Industrial Applications
Typical applications include:
- Cooling tower fan systems
- Large industrial blowers and ventilation systems
- Pumps and compressors
- Paper mill machinery
- Hydroelectric turbine auxiliaries
- Petrochemical and refinery equipment
- Mining and heavy industrial machinery
- Low-speed rotating equipment in general
Its design makes it ideal for slow-speed and low-frequency vibration environments.
Installation and System Integration
Installation Guidelines
- Mount rigidly on machine casing or bearing housing
- Use correct stud/mounting configuration (3/8-24 interface)
- Ensure proper surface preparation for accurate signal transfer
- Follow torque specifications for secure installation
- Route cables away from EMI sources
- Avoid mechanical stress on connector housing
Proper installation ensures accurate vibration measurement and long-term stability.
Compatible Components and Systems
The 200155-18-CN is designed to work with:
- Bently Nevada Trendmaster Pro systems
- Trendmaster TIM modules (Transducer Interface Modules)
- 200100 / 89130 interface modules
- 1900/25 and 1900/27 monitoring systems
- Plant-wide condition monitoring networks
It integrates into a full machinery health monitoring architecture.
Recommended Alternative Models
| Model | Key Feature | Application |
|---|---|---|
| 200155-12-05 | Similar low-frequency accelerometer | General industrial monitoring |
| 200155-10-05 | Standard Trendmaster Pro sensor | Pump and fan systems |
| 200157-18-CN | Higher sensitivity variant | Severe environment monitoring |
| 200150 series | General-purpose accelerometers | Broader frequency range applications |
| 200155-00-CN | Base configuration model | Standard installations |
Key Advantages
- Excellent low-frequency vibration detection
- Rugged stainless steel hermetically sealed design
- High reliability in harsh industrial environments
- Supports long-term vibration trending
- Compatible with Trendmaster Pro systems
- High shock and environmental resistance
- Suitable for continuous monitoring applications
- Proven industrial reliability
Technical FAQs
What is the main function of the 200155-18-CN?
It measures low-frequency vibration in rotating machinery for condition monitoring and predictive maintenance.
What kind of equipment uses this sensor?
Cooling towers, blowers, pumps, compressors, and other low-speed rotating machinery.
Is this sensor suitable for harsh environments?
Yes. It is hermetically sealed and designed for extreme industrial conditions.
Does it require a specific monitoring system?
Yes. It is intended for use with Bently Nevada Trendmaster Pro systems and compatible TIM modules.
What makes it different from standard accelerometers?
It is optimized for low-frequency vibration trends, making it ideal for slow-speed machinery monitoring.
Conclusion
The Bently Nevada 200155-18-CN Low-Frequency Trendmaster Pro Accelerometer is a robust and highly specialized vibration sensor designed for industrial condition monitoring. Its ability to accurately capture low-frequency vibration trends makes it essential for monitoring slow-speed rotating machinery such as cooling towers, blowers, and pumps. With strong environmental resistance and seamless integration into Trendmaster systems, it plays a critical role in predictive maintenance and machinery reliability programs.