Bently Nevada 200157-02-05 Enveloping Trendmaster Pro Accelerometer

Product Introduction

When roller element bearings begin to fail or cavitation effects threaten machinery reliability, the Bently Nevada 200157-02-05 provides precise vibration data for early diagnosis. This Enveloping Trendmaster Pro accelerometer is designed specifically for detecting subtle fault signatures in rotating equipment. Manufactured in the U.S.A., it integrates seamlessly with the ProTIM option for standard acceleration-to-velocity with acceleration enveloping channel type (-06). The 200157-02-05 is built for demanding industrial environments where accurate, repeatable measurements are essential.

Technical Specifications Breakdown

The 200157-02-05 delivers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a tolerance of ±12%. Its measurement range spans ±245 m/s² (±25 g), making it suitable for monitoring a wide spectrum of vibration amplitudes. The frequency range covers 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz with a ±10% tolerance. Mounted resonant frequency exceeds 20 kHz (>1200 kcpm), ensuring reliable performance across the operating band. Amplitude linearity is within ±2% from 1 to 10 g peak, and transverse sensitivity is ≤7%. Settling time is ≤300 ms within 5% of bias. Excitation voltage ranges from 4.7 to 5.5 Vdc, with quiescent current <800 µA and output bias voltage of +2.5 ± 0.23 Vdc. Environmental ratings include axial shock limit of 49,050 m/s² pk (5,000 g pk), temperature range of -40 °C to +105 °C (-40 °F to +221 °F), and 100% relative humidity (condensing, non-submerged). Hermetic sealing is rated at 5×10⁻⁸ atm•cc/s maximum. Physical dimensions are 17.5 mm x 45.7 mm (11/16 in x 1.8 in) with a weight of 58 g (2.0 oz). 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 shear geometry, and the housing and connector material is 316L stainless steel.

Industry Applications

This accelerometer excels in monitoring roller element bearings in pumps, motors, compressors, and turbines. Its enveloping capability isolates bearing fault frequencies from background noise, enabling early detection of spalling, brinelling, or fatigue. The 200157-02-05 also handles certain types of cavitation effects in fluid-handling equipment, such as centrifugal pumps and hydro turbines. By providing accurate vibration data, it helps maintenance teams schedule repairs proactively, reducing unplanned downtime and extending equipment life.

Installation & Setup Guidance

Mount the 200157-02-05 using the 3/8-24 female thread with a mounting stud option of 02 (3/8-24 to 3/8-24 UNF 1-3/8 inch hex plate stud). 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 on a flat, clean surface with direct contact to the bearing housing. Use the ProTIM option for standard acceleration-to-velocity with acceleration enveloping channel type (-06) to configure the measurement. Allow a settling time of up to 300 ms after power-up before taking critical readings. Ensure excitation voltage is within 4.7 to 5.5 Vdc and that the output bias voltage measures +2.5 ± 0.23 Vdc.

Maintenance & Reliability

Periodically inspect the accelerometer for physical damage, corrosion, or loose mounting. Verify that the hermetic seal remains intact by checking for moisture ingress. The 316L stainless steel housing provides excellent resistance to harsh environments. Clean the mounting surface and re-torque if necessary during routine maintenance. The ceramic shear sensing element offers long-term stability and reliability. For critical applications, perform a functional check by measuring output bias voltage and comparing it to the specified range. Regular calibration verification ensures measurement accuracy over time.

Selection Guide & Purchasing Advice

Before purchasing the 200157-02-05, verify that your monitoring system supports the ProTIM option and acceleration enveloping channel type. Confirm that the mounting thread (3/8-24 female) matches your installation point. The multiple approvals (CSA, ATEX, and IECEx) make this unit suitable for hazardous area installations. For complete technical specifications and availability, contact BluePLC Industrial. Our team can help you select the correct accelerometer for your application and provide guidance on compatible accessories.