Why Choose the Bently Nevada 200157-06-05 for Bearing and Cavitation Monitoring?
When unexpected machinery failures threaten production uptime, the Bently Nevada 200157-06-05 Enveloping Trendmaster Pro accelerometer delivers the precision and reliability needed for early fault detection. Designed specifically for roller element bearings and certain cavitation effects, this sensor provides actionable vibration data to prevent catastrophic downtime.
Product Overview
The Bently Nevada 200157-06-05 is an Enveloping Trendmaster Pro accelerometer manufactured in the USA. It features a mounting stud option of 06 (3/8-24 to 1/4 NPT, 3/4 inch hex stud) and carries multiple approvals (CSA, ATEX, and IECEx) under approval code 05. This accelerometer is used with the ProTIM option for standard acceleration-to-velocity with acceleration enveloping channel type (-06). Its primary application is monitoring roller element bearings and certain types of cavitation effects in rotating machinery.
Technical Specifications Breakdown
Sensitivity and Range: At 80 Hz, the sensitivity is 10.2 mV/(m/s²) (100 mV/g) with ±12% tolerance. The measurement range is ±245 m/s² (±25 g) for the accelerometer, with a low-range capability of 14.7 mm/s² (1.5 mg).
Frequency Response: The frequency range referenced to 80 Hz is 10 to 10,000 Hz (600 to 600,000 cpm) with ±10% tolerance. Mounted resonant frequency exceeds 20 kHz (>1200 kcpm).
Linearity and Transverse Sensitivity: Amplitude linearity from 1 to 10 g pk is ±2%. Transverse sensitivity is ≤7%.
Electrical Characteristics: Excitation voltage is 4.7 to 5.5 Vdc. Quiescent current is less than 800 µA. Output bias voltage is +2.5 ± 0.23 Vdc. Polarity is SIG+ positive with respect to SIG- for acceleration from base to connector. Settling time within 5% of bias is ≤300 ms.
Environmental Ratings: Axial shock limit is 49,050 m/s² pk (5,000 g pk). Temperature range is -40°C to +105°C (-40°F to +221°F). Hermetic sealing is 5x10⁻⁸ atm•cc/s maximum. Relative humidity tolerance is 100% relative, condensing, non-submerged.
Physical Dimensions: Size is 17.5 mm x 45.7 mm (11/16 in x 1.8 in). Weight is 58 g (2.0 oz), typical. Mounting thread is 3/8-24 female. Mounting torque is 2.7 to 6.8 N•m (2 to 5 ft•lbf). Sensing element is ceramic with shear geometry. Housing and connector material is 316L stainless steel. Storage temperature range is -55°C to +121°C (-67°F to +250°F) with a cure time of 24 hours.
Industry Applications
The 200157-06-05 excels in monitoring roller element bearings in pumps, motors, compressors, and turbines. Its enveloping capability enhances detection of early-stage bearing defects and cavitation in fluid-handling equipment. For example, in a petrochemical plant, this accelerometer can identify subtle vibration signatures from pump cavitation before damage escalates, enabling planned maintenance rather than emergency repairs.
Installation & Setup Guidance
Mount the accelerometer using the 3/8-24 female thread with a torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). Ensure the mounting surface is clean and flat for optimal coupling. The stud option 06 provides a 3/4 inch hex for secure tightening. Connect excitation voltage between 4.7 and 5.5 Vdc, and verify output bias voltage is within +2.5 ± 0.23 Vdc after settling. Allow 24 hours cure time if adhesive mounting is used.
Maintenance & Reliability
Regularly inspect the accelerometer for physical damage or corrosion, especially in harsh environments. The hermetically sealed design (5x10⁻⁸ atm•cc/s maximum) protects against moisture ingress. Verify sensitivity annually using a known vibration source to ensure consistent performance. The ceramic shear sensing element provides long-term stability, reducing recalibration frequency.
Selection Guide & Purchasing Advice
Before purchasing the 200157-06-05, confirm your application requires enveloping capability for bearing or cavitation monitoring. Verify compatibility with your data acquisition system, particularly the excitation voltage range (4.7 to 5.5 Vdc). SpareTechPLC offers this accelerometer with multiple approvals, ensuring compliance with global safety standards. Contact SpareTechPLC to confirm current lifecycle status and availability before ordering.
Frequently Asked Questions
Q: What is the primary application of the 200157-06-05?
A: It is designed for monitoring roller element bearings and certain types of cavitation effects in rotating machinery.
Q: What approvals does the 200157-06-05 carry?
A: It carries multiple approvals including CSA, ATEX, and IECEx under approval code 05.
Q: What is the sensitivity of this accelerometer?
A: At 80 Hz, sensitivity is 10.2 mV/(m/s²) (100 mV/g) with ±12% tolerance.
Q: What is the temperature range for operation?
A: The operating temperature range is -40°C to +105°C (-40°F to +221°F).
Q: What mounting thread does the 200157-06-05 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).
