Bently Nevada 200157-07-05 Enveloping Trendmaster Pro Accelerometer

Product Introduction

When roller element bearings begin to fail or cavitation effects threaten rotating machinery, the Bently Nevada 200157-07-05 Enveloping Trendmaster Pro Accelerometer provides the early warning you need. This accelerometer is part of the Trendmaster Pro family and is specifically engineered for envelope-based vibration analysis. It converts acceleration signals to velocity with an enveloping channel type, making it ideal for detecting subtle fault signatures in bearings and cavitation events. Manufactured in the U.S.A., the 200157-07-05 offers multiple approvals including CSA, ATEX, and IECEx, ensuring compliance in hazardous environments.

Technical Specifications Breakdown

The Bently Nevada 200157-07-05 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). Its frequency response spans 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz. The mounted resonant frequency exceeds 20 kHz (>1200 kcpm), and amplitude linearity is within ±2% (1 to 10 g pk). Transverse sensitivity is ≤7%, and settling time (within 5% of bias) 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. Environmental ratings include an 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), hermetic sealing at 5×10⁻⁸ atm·cc/s, and 100% relative humidity (condensing, non-submerged). 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). The mounting thread is 3/8-24 female, with recommended 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 are 316L stainless steel.

Industry Applications

The 200157-07-05 excels in monitoring roller element bearings in pumps, motors, compressors, and turbines. Its enveloping capability isolates bearing defect frequencies from background noise, enabling detection of spalling, brinelling, and cage wear. Additionally, it is suitable for detecting cavitation effects in centrifugal pumps and hydraulic systems. The accelerometer's wide frequency range and high shock tolerance make it a reliable choice for heavy industrial environments such as oil and gas, petrochemical, and power generation.

Installation & Setup Guidance

Mount the Bently Nevada 200157-07-05 using the 3/8-24 female thread. The mounting stud option 07 provides a 3/8-24 to 3/8 NPT adapter with a 3/4 inch hex stud. Apply mounting torque between 2.7 and 6.8 N·m (2 to 5 ft·lbf) to ensure proper mechanical coupling. For best results, mount the accelerometer on a flat, clean surface directly over the bearing housing. Use the ProTIM option for standard acceleration-to-velocity with acceleration enveloping. Ensure excitation voltage is within 4.7 to 5.5 Vdc and verify output bias voltage is +2.5 ± 0.23 Vdc after installation.

Maintenance & Reliability

The 200157-07-05 is hermetically sealed to 5×10⁻⁸ atm·cc/s, providing excellent protection against moisture and contaminants. Its 316L stainless steel housing resists corrosion in harsh environments. Periodically verify the output bias voltage and sensitivity at 80 Hz to confirm proper operation. The ceramic shear sensing element offers long-term stability. For maximum reliability, inspect the mounting surface and torque annually, and replace the accelerometer if bias voltage drifts outside specification.

Selection Guide & Purchasing Advice

When selecting the Bently Nevada 200157-07-05, verify the mounting stud option and approvals match your application. This model includes multiple approvals (CSA, ATEX, and IECEx). Ensure your monitoring system supports the 10.2 mV/(m/s²) sensitivity and enveloping channel type. BluePLC Industrial offers the 200157-07-05 with full traceability and fast shipping. Contact our team to confirm compatibility with your existing Bently Nevada monitoring equipment.