Bently Nevada 200157-05-CN Enveloping Trendmaster Pro Accelerometer Overview

Product Introduction

When unexpected bearing failures or cavitation effects disrupt your rotating machinery, the Bently Nevada 200157-05-CN Enveloping Trendmaster Pro accelerometer delivers the precise vibration data you need. This sensor is purpose-built for roller element bearing monitoring and certain types of cavitation effects, providing early warning to prevent costly downtime. As part of the Trendmaster Pro family, this accelerometer integrates seamlessly with ProTIM options for standard acceleration-to-velocity with acceleration enveloping.

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). Its frequency range spans 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz. The mounted resonant frequency exceeds 20 kHz (>1200 kcpm), ensuring reliable high-frequency response. Amplitude linearity is within ±2% (1 to 10 g pk), and transverse sensitivity is ≤7%. Settling time is ≤300 ms. Excitation voltage ranges from 4.7 to 5.5 Vdc, with quiescent current less than 800 µA and output bias voltage of +2.5 ± 0.23 Vdc. The accelerometer also measures down to 14.7 mm/s² (1.5 mg).

Industry Applications

In paper mills, the 200157-05-CN detects early-stage bearing degradation in dryer rolls and press sections. By capturing enveloped acceleration signals, it identifies inner race defects before they escalate. In mining operations, this sensor monitors crusher bearings and conveyor pulley assemblies, where cavitation from slurry pumps can cause rapid wear. The accelerometer's high-frequency capability (>20 kHz resonant frequency) makes it effective for detecting cavitation-induced vibration patterns.

Installation & Setup Guidance

Mount the 200157-05-CN using the 3/8-24 female thread with a mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). The mounting stud option 05 includes a 3/8-24 to 1/4-28 UNF 1-3/8 inch hex plate stud. Ensure the sensor base is clean and flat for optimal coupling. Connect the excitation voltage between 4.7 and 5.5 Vdc, observing polarity: SIG+ positive with respect to SIG-. Allow 24 hours cure time for the mounting adhesive if used. The accelerometer settles within 5% of bias in ≤300 ms.

Maintenance & Reliability

Inspect the 200157-05-CN periodically for physical damage or corrosion, especially in high-humidity environments (100% relative, condensing). The hermetically sealed design (5x10⁻⁸ atm•cc/s maximum leak rate) protects against moisture ingress. The ceramic shear sensing element and 316L stainless steel housing ensure long-term stability. Verify output bias voltage remains within +2.5 ± 0.23 Vdc during routine checks. Replace if sensitivity drifts beyond ±12% at 80 Hz.

Selection Guide & Purchasing Advice

Before ordering the 200157-05-CN, confirm your system's excitation voltage range (4.7 to 5.5 Vdc) and required frequency response (10 to 10,000 Hz). The CN approval indicates country-specific certification; verify compatibility with your regional standards. For replacement or new installations, ensure the mounting thread matches your equipment (3/8-24 female). BluePLC Industrial stocks this accelerometer and can assist with cross-referencing older Bently Nevada models. Contact us for current lifecycle status and availability.