Bently Nevada 200157-03-05 Enveloping Trendmaster Pro Accelerometer

Product Introduction

When roller element bearings begin to fail or cavitation effects threaten rotating machinery, the Bently Nevada 200157-03-05 Enveloping Trendmaster Pro accelerometer provides early warning. This sensor is designed to detect subtle vibration signatures that standard accelerometers miss. Part of the Trendmaster Pro family, it works with the ProTIM option for standard acceleration-to-velocity with acceleration enveloping channel type (-06).

Technical Specifications Breakdown

The 200157-03-05 delivers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with ±12% tolerance. Its measurement range spans ±245 m/s² (±25 g) for acceleration and 14.7 mm/s² (1.5 mg) for low-level signals. The frequency range covers 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz. Mounted resonant frequency exceeds 20 kHz (>1200 kcpm). Amplitude linearity holds within ±2% (1 to 10 g pk), and transverse sensitivity is ≤7%. Settling time is ≤300 ms. Excitation voltage is 4.7 to 5.5 Vdc, with quiescent current <800 µA and output bias voltage of +2.5 ± 0.23 Vdc. The accelerometer withstands axial shock up to 49,050 m/s² pk (5,000 g pk) and operates from -40 ºC to +105 ºC (-40 ºF to +221 ºF). Hermetic sealing is 5x10⁻⁸ atm•cc/s maximum. Size is 17.5 mm x 45.7 mm (11/16 in x 1.8 in), weight 58 g (2.0 oz). Mounting thread is 3/8-24 female, with mounting torque 2.7 to 6.8 N•m (2 to 5 ft•lbf). The ceramic sensing element uses shear geometry, and the housing is 316L stainless steel.

Industry Applications

This accelerometer excels in roller element bearing monitoring across industries like petrochemical, power generation, and pulp & paper. It also detects cavitation effects in pumps and turbines. Compared to general-purpose accelerometers, the 200157-03-05 offers enveloping capability that isolates bearing defect frequencies from background noise, enabling earlier fault detection. Its wide frequency range and high shock tolerance suit harsh environments.

Installation & Setup Guidance

Mount the 200157-03-05 using the 3/8-24 female thread. For the mounting stud option 03, use a 3/8-24 to 1/2-20 UNF 1-3/8 inch hex plate stud. Apply mounting torque between 2.7 and 6.8 N•m (2 to 5 ft•lbf). Ensure the mounting surface is clean and flat for optimal coupling. Connect excitation voltage of 4.7 to 5.5 Vdc, observing polarity: SIG+ positive with respect to SIG- for acceleration from base to connector. Allow 24 hours cure time for adhesive mounting if used.

Maintenance & Reliability

Inspect the accelerometer periodically for cable integrity and connector tightness. The hermetic seal maintains reliability in condensing humidity environments. With a temperature range of -40 ºC to +105 ºC and 100% relative humidity tolerance, this sensor suits outdoor and washdown areas. Regular calibration checks ensure sensitivity remains within ±12% of 10.2 mV/(m/s²).

Selection Guide & Purchasing Advice

Before ordering the 200157-03-05, verify your system requires an enveloping accelerometer with acceleration channel type. Confirm the mounting thread matches your bracket or stud. The multiple approvals (CSA, ATEX, and IECEx) make it suitable for hazardous locations. BluePLC Industrial offers this Bently Nevada accelerometer with fast shipping and expert support. Contact us for current lifecycle status and availability.