Bently Nevada 200157-20-05 Enveloping Trendmaster Pro Accelerometer

Product Introduction

When monitoring roller element bearings and detecting cavitation effects in rotating machinery, the Bently Nevada 200157-20-05 Enveloping Trendmaster Pro Accelerometer provides a reliable solution. This accelerometer, manufactured by Bently Nevada in the U.S.A., is designed for use with the ProTIM option featuring standard acceleration-to-velocity with acceleration enveloping channel type (-06). Its primary function is to capture vibration data from critical assets, enabling predictive maintenance strategies that reduce unplanned downtime.

Technical Specifications Breakdown

The 200157-20-05 delivers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a measurement range of ±245 m/s² (±25 g). It covers a frequency range of 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz. The mounted resonant frequency exceeds 20 kHz (>1200 kcpm), ensuring accurate readings across a wide spectrum. Amplitude linearity is within ±2% (1 to 10 g pk), and transverse sensitivity is ≤7%. The accelerometer settles within 5% of bias in ≤300 ms. It operates with an excitation voltage of 4.7 to 5.5 Vdc and a quiescent current of less than 800 µA. The output bias voltage is +2.5 ± 0.23 Vdc. Environmental ratings include an axial shock limit of 49,050 m/s² pk (5,000 g pk) and a temperature range of -40 °C to +105 °C (-40 °F to +221 °F). Hermetic sealing is rated at 5x10⁻⁸ atm•cc/s maximum. Physical dimensions are 17.5 mm hex x 45.7 mm height (11/16 in x 1.8 in), with a typical weight of 58 g (2.0 oz). The mounting thread is 3/8-24 female, with a recommended mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). The sensing element is ceramic with a shear geometry, and the housing is 316L stainless steel.

Industry Applications

This accelerometer excels in monitoring roller element bearings in pumps, motors, compressors, and fans across industries such as oil and gas, power generation, and manufacturing. It also detects cavitation effects in fluid handling equipment. The high sensitivity and wide frequency range allow early detection of bearing defects, helping engineers schedule maintenance before catastrophic failure occurs. The multiple approvals (CSA, ATEX, and IECEx) make it suitable for hazardous environments, ensuring compliance with international safety standards.

Installation & Setup Guidance

Mount the 200157-20-05 using the 3/8-24 female thread with a mounting stud option of 20 (3/8-24 thread, 1 magnetic mount base). Apply a mounting torque between 2.7 and 6.8 N•m (2 to 5 ft•lbf) to ensure proper coupling. For best results, mount the accelerometer directly on the bearing housing or as close as possible to the vibration source. Use the ProTIM option for standard acceleration-to-velocity with acceleration enveloping channel type (-06). Verify that the excitation voltage is between 4.7 and 5.5 Vdc and that the quiescent current remains below 800 µA. Allow 24 hours cure time for any adhesive mounting if applicable.

Maintenance & Reliability

Routine inspection of the accelerometer and its cabling ensures long-term reliability. Check for physical damage, corrosion, or loose connections. The hermetically sealed design (5x10⁻⁸ atm•cc/s maximum) protects against moisture and contaminants, even in 100% relative humidity condensing environments. The 316L stainless steel housing resists corrosion in harsh industrial settings. Periodic calibration checks ensure sensitivity remains within ±12% at 80 Hz. For critical assets, consider redundant monitoring to maintain data integrity.

Selection Guide & Purchasing Advice

When selecting the 200157-20-05, verify that the mounting thread (3/8-24 female) and stud option (20 with magnetic mount base) match your installation requirements. Confirm that the ProTIM option and acceleration enveloping channel type align with your monitoring system. The multiple approvals (CSA, ATEX, and IECEx) cover most hazardous area classifications. For complete technical specifications and availability, contact BluePLC Industrial, your trusted supplier of industrial automation parts. BluePLC Industrial can assist with cross-referencing and ensure you receive the correct model for your application.