Product Overview
When roller element bearing failures and cavitation effects threaten machinery uptime, the Bently Nevada 200157-02-05 Enveloping Trendmaster Pro accelerometer provides precise vibration monitoring. This sensor is designed for demanding industrial environments where early fault detection is critical. With a measurement range of ±245 m/s² (±25 g) and a frequency range from 10 to 10,000 Hz (600 to 600,000 cpm), it captures both acceleration and enveloped signals for reliable diagnostics.
Technical Specifications Breakdown
The 200157-02-05 delivers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a ±12% tolerance. Its mounted resonant frequency exceeds 20 kHz (>1200 kcpm), ensuring accurate readings across the operating band. Amplitude linearity is ±2% from 1 to 10 g pk, and transverse sensitivity is ≤7%. The accelerometer uses a ceramic shear sensing element housed in 316L stainless steel, with a size of 17.5 mm x 45.7 mm (11/16 in x 1.8 in) and a typical weight of 58 g (2.0 oz).
Industry Applications
This accelerometer is specifically designed for roller element bearing monitoring and detecting cavitation effects in pumps and compressors. In a typical application, it mounts directly on bearing housings to capture high-frequency vibration signatures. The enveloping channel type (-06) converts acceleration to velocity with acceleration enveloping, making it ideal for early-stage fault detection. Compared to standard accelerometers, the 200157-02-05 offers enhanced sensitivity to bearing defects through its specialized signal processing.
Installation & Setup Guidance
Mount the 200157-02-05 using the provided 3/8-24 female thread with a mounting torque of 2.7 to 6.8 N·m (2 to 5 ft·lbf). The mounting stud option 02 includes a 3/8-24 to 3/8-24 UNF 1-3/8 inch hex plate stud. Ensure the mounting surface is clean and flat to achieve optimal coupling. Excitation voltage must be 4.7 to 5.5 Vdc, with quiescent current less than 800 µA. Allow 24 hours cure time if using adhesive mounting. The output bias voltage is +2.5 ± 0.23 Vdc, and polarity is SIG+ positive with respect to SIG-.
Maintenance & Reliability
Routine inspection of the accelerometer and its cabling is recommended to ensure consistent signal integrity. The hermetic sealing (5X10⁻⁸ atm·cc/s maximum) protects against moisture and contaminants, enabling operation in 100% relative humidity (condensing, non-submerged). The temperature range of -40 ºC to +105 ºC (-40 ºF to +221 ºF) supports harsh environments. With a settling time of ≤300 ms (within 5% of bias), the sensor quickly stabilizes after power-up, reducing downtime during commissioning.
Compatibility & Integration
The 200157-02-05 works with Bently Nevada monitoring systems that support accelerometer inputs. It is used with the ProTIM option for standard acceleration-to-velocity with acceleration enveloping channel type (-06). The multiple approvals (CSA, ATEX, and IECEx) ensure compatibility with hazardous area installations. For seamless integration, verify that the excitation voltage matches the 4.7 to 5.5 Vdc requirement and that the signal polarity is correctly wired.
Selection Guide & Purchasing Advice
Before purchasing the 200157-02-05, confirm the mounting thread size (3/8-24 female) and the application environment. The accelerometer is suitable for roller element bearings and cavitation detection. SpareTechPLC offers this model with verified authenticity and fast shipping. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
Comparison: Enveloping vs. Standard Accelerometers
| Feature | 200157-02-05 Enveloping Trendmaster Pro | Standard Accelerometer |
|---------|------------------------------------------|------------------------|
| Measurement Range | ±245 m/s² (±25 g) | Varies (e.g., ±50 g typical) |
| Frequency Range | 10 to 10,000 Hz (600 to 600,000 cpm) | 0.5 to 10,000 Hz typical |
| Sensitivity | 10.2 mV/(m/s²) (100 mV/g) | 10 to 100 mV/g typical |
| Enveloping Capability | Yes (acceleration-to-velocity with acceleration enveloping) | No |
| Application Focus | Roller element bearings, cavitation | General vibration |
| Approvals | CSA, ATEX, IECEx | Varies |
The 200157-02-05 provides specialized enveloping processing that standard accelerometers lack, making it superior for bearing fault detection.
Frequently Asked Questions
Q1: What is the measurement range of the 200157-02-05?
A: The measurement range is ±245 m/s² (±25 g).
Q2: What temperature range can this accelerometer withstand?
A: It operates from -40 ºC to +105 ºC (-40 ºF to +221 ºF).
Q3: What type of mounting thread does it use?
A: It uses a 3/8-24 female thread with a mounting torque of 2.7 to 6.8 N·m (2 to 5 ft·lbf).
Q4: What approvals does the 200157-02-05 have?
A: It has multiple approvals: CSA, ATEX, and IECEx.
Q5: Is this accelerometer suitable for roller element bearing monitoring?
A: Yes, it is specifically designed for roller element bearing and cavitation effect detection.
