Bently Nevada 200157-05-CN Enveloping Trendmaster Pro Accelerometer

Product Overview

When roller element bearings begin to fail or cavitation effects threaten rotating machinery, the Bently Nevada 200157-05-CN Enveloping Trendmaster Pro Accelerometer delivers precise vibration data to enable early intervention. This accelerometer is designed specifically for enveloping measurements, capturing impact signals that standard accelerometers miss. Part of the Trendmaster Pro family, the 200157-05-CN provides reliable performance in demanding industrial environments.

Technical Specifications

The 200157-05-CN offers 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 operates across 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 the operating band. Amplitude linearity is within ±2% from 1 to 10 g pk, and transverse sensitivity is ≤7%. The accelerometer settles within 5% of bias in ≤300 ms. Excitation voltage is 4.7 to 5.5 Vdc, with quiescent current below 800 µA and output bias voltage of +2.5 ± 0.23 Vdc. The sensing element is ceramic with shear geometry, housed in 316L stainless steel. Size is 17.5 mm x 45.7 mm (11/16 in x 1.8 in), weight 58 g (2.0 oz) typical, with 3/8-24 female mounting thread and recommended torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf).

Industry Applications

The 200157-05-CN excels in monitoring roller element bearings in pumps, motors, compressors, and turbines. Its enveloping capability detects early-stage bearing defects such as spalling, pitting, and flaking by isolating high-frequency impact signals. It also identifies cavitation effects in centrifugal pumps and hydraulic systems, where vapor bubble collapse generates characteristic high-frequency vibrations. By catching these issues early, the accelerometer helps prevent catastrophic failures and unplanned downtime.

Installation & Setup Guidance

Mount the 200157-05-CN directly onto the bearing housing or machine casing using the 3/8-24 female thread. The mounting stud option 05 provides a 3/8-24 to 1/4-28 UNF 1-3/8 inch hex plate stud for flexible installation. Apply the specified torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf) to ensure proper coupling. Allow 24 hours cure time if using adhesive mounting. Connect to a ProTIM option configured for Standard Acceleration-to-Velocity with Acceleration Enveloping channel type (-06) for optimal signal processing. Ensure excitation voltage is within 4.7 to 5.5 Vdc.

Maintenance & Reliability

The 200157-05-CN features hermetic sealing (5x10⁻⁸ atm•cc/s maximum leak rate) and operates from -40 °C to +105 °C (-40 °F to +221 °F). It withstands 100% relative humidity, condensing, non-submerged. Axial shock limit is 49,050 m/s² pk (5,000 g pk). The ceramic shear sensing element provides long-term stability. No routine maintenance is required beyond periodic inspection of the cable and connector integrity. Verify output bias voltage remains within +2.5 ± 0.23 Vdc during operation.

Selection Guide & Purchasing Advice

Before ordering the 200157-05-CN, confirm that your monitoring system supports the ProTIM option with Acceleration Enveloping channel type (-06). Verify that the mounting thread (3/8-24 female) matches your installation point. For applications requiring country-specific approvals, the CN suffix indicates compliance with local regulations. Contact BluePLC Industrial to confirm availability and lifecycle status. BluePLC Industrial offers genuine Bently Nevada products with expert support for your vibration monitoring needs.