Product Overview
The Bently Nevada 200157-05-CN is an Enveloping Trendmaster Pro Accelerometer designed for continuous vibration monitoring in industrial rotating machinery. This Industrial Automation Module excels at detecting early-stage faults in roller element bearings and certain cavitation effects, enabling predictive maintenance and reducing unplanned downtime. With a measurement range of ±245 m/s² (±25 g) and a frequency response of 10 to 10,000 Hz (600 to 600,000 cpm), it captures critical vibration data across a wide spectrum.
Engineered for reliability, the 200157-05-CN features a hermetically sealed 316L stainless steel housing, ensuring durability in harsh environments. Its ceramic shear sensing element provides stable, accurate output, while the integrated electronics deliver a standard acceleration-to-velocity with acceleration enveloping channel type (-06) when used with the ProTIM option.
Technical Specifications
All specifications are at +25°C (+77°F) unless otherwise noted. The following table details the key parameters of the Bently Nevada 200157-05-CN:
| Parameter |
Value |
| Sensitivity @ 80 Hz (±12%) |
10.2 mV/(m/s²) (100 mV/g) |
| Measurement Range |
±245 m/s² (±25 g) |
| Frequency Range (Referenced to 80 Hz, ±10%) |
10 to 10,000 Hz (600 to 600,000 cpm) |
| Mounted Resonant Frequency |
>20 kHz (>1200 kcpm) |
| Amplitude Linearity (1 to 10 g pk) |
±2% |
| Transverse Sensitivity |
≤7% |
| Settling Time (Within 5% of Bias) |
≤300 ms |
| Excitation Voltage |
4.7 to 5.5 Vdc |
| Quiescent Current |
<800 µA |
| Output Bias Voltage |
+2.5 ± 0.23 Vdc |
| Axial Shock Limit |
49,050 m/s² pk (5,000 g pk) |
| Temperature Range |
-40 ºC to +105 ºC (-40 ºF to +221 ºF) |
| Sealing (Hermetic) |
5×10⁻⁸ atm•cc/s (3.1×10⁻⁹ atm•in³/s) max |
| Relative Humidity |
100% condensing, non-submerged |
| Size (Hex × Height) |
17.5 mm × 45.7 mm (11/16 in × 1.8 in) |
| Weight |
58 g (2.0 oz), typical |
| Mounting Thread |
3/8-24 female |
| Mounting Torque |
2.7 to 6.8 N•m (2 to 5 ft•lbf) |
| Sensing Element / Geometry |
Ceramic / Shear |
| Housing Material |
316L stainless steel (200155) |
Key Features & Benefits
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Enveloping capability: The 200157-05-CN supports acceleration enveloping, making it ideal for early bearing fault detection.
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Wide frequency range: Captures both low-speed and high-speed machinery vibrations.
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Robust construction: Hermetic sealing and stainless steel housing withstand harsh industrial environments.
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Low power consumption: Quiescent current under 800 µA suits battery-powered or loop-powered systems.
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Precise output: Sensitivity tolerance of ±12% ensures consistent measurement across units.
Industry Applications
The Bently Nevada 200157-05-CN is specifically designed for monitoring roller element bearings and detecting cavitation effects in pumps, compressors, and turbines. For example, in a paper mill, this accelerometer can be mounted on dryer rolls to identify bearing wear before catastrophic failure, minimizing production stoppages. In chemical plants, it helps monitor reactor agitators where cavitation can erode impellers, allowing maintenance teams to schedule repairs proactively.
Its wide temperature range and humidity resistance make it suitable for outdoor and washdown environments. Whether used in condition monitoring systems or portable data collectors, the 200157-05-CN delivers reliable data for asset health management.
Installation & Setup
Proper mounting is critical for accurate vibration measurement. Follow these guidelines for the 200157-05-CN:
- Prepare a flat, clean mounting surface on the machine housing.
- Use the 3/8-24 female thread with a stud (option 05: 3/8-24 to 1/4-28 UNF, 1-3/8 inch hex plate stud) for secure attachment.
- Apply the recommended mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf) to ensure good mechanical coupling without over-stressing the sensor.
- Connect the excitation voltage (4.7 to 5.5 Vdc) and signal lines, observing correct polarity (SIG+ positive with respect to SIG-).
- Allow the sensor to settle for at least 300 ms after power-up before taking measurements.
Maintenance & Reliability
The 200157-05-CN requires minimal maintenance due to its rugged design. Periodically inspect the mounting stud for loosening and check the cable for damage. Keep the sensor surface clean to prevent contamination. With a hermetic seal and corrosion-resistant housing, this accelerometer offers long service life, reducing lifecycle costs and downtime.
Selection Guide & Purchasing Advice
When ordering the Bently Nevada 200157-05-CN, verify the mounting stud option and approvals code. This model includes the '05' stud option and 'CN' country-specific approval. Ensure compatibility with your existing monitoring system, particularly the ProTIM option for enveloping. For reliable sourcing and competitive pricing, PLC Source PRO offers genuine parts with fast worldwide shipping. Contact our team to confirm availability and lead times.