Bently Nevada 200157-06-05 Enveloping Trendmaster Pro Accelerometer

Product Overview

When roller element bearings begin to fail or cavitation effects threaten rotating machinery, the Bently Nevada 200157-06-05 Enveloping Trendmaster Pro Accelerometer provides early detection. This accelerometer is part of the Trendmaster Pro family and is engineered for continuous vibration monitoring in demanding industrial environments. With multiple approvals including CSA, ATEX, and IECEx, it is suitable for hazardous area installations where reliability is non-negotiable. The 200157-06-05 is used with the ProTIM option for standard acceleration-to-velocity with acceleration enveloping, making it a versatile tool for predictive maintenance programs.

Technical Specifications

The Bently Nevada 200157-06-05 delivers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz (±12%), ensuring accurate vibration measurement. Its measurement range is ±245 m/s² (±25 g), covering a wide spectrum of machinery vibration levels. The frequency range spans 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz, which is ideal for detecting bearing faults and cavitation. The mounted resonant frequency exceeds 20 kHz (>1200 kcpm), providing a high-frequency response for early fault detection. Amplitude linearity is within ±2% (1 to 10 g pk), and transverse sensitivity is ≤7%, ensuring reliable readings even in complex vibration environments. The accelerometer settles within 300 ms (within 5% of bias), and requires an excitation voltage of 4.7 to 5.5 Vdc. Quiescent current is less than 800 µA, and output bias voltage is +2.5 ± 0.23 Vdc. The accelerometer also features a low measurement range of 14.7 mm/s² (1.5 mg) for subtle vibration analysis.

Industry Applications

The 200157-06-05 is specifically designed for roller element bearing monitoring and detecting certain types of cavitation effects in pumps and compressors. By using acceleration enveloping, it isolates early-stage bearing defects that standard vibration sensors might miss. This capability reduces unplanned downtime and extends machinery life, delivering a strong return on investment for plants that rely on continuous operation. In the oil and gas, power generation, and chemical processing industries, this accelerometer helps maintenance teams shift from reactive repairs to condition-based maintenance, lowering overall maintenance costs.

Installation & Setup Guidance

Mounting the Bently Nevada 200157-06-05 requires a 3/8-24 female thread with a mounting stud option of 06 (3/8-24 to 1/4 NPT, 3/4 inch hex stud). Apply a mounting torque of 2.7 to 6.8 N·m (2 to 5 ft·lbf) for secure attachment. The accelerometer is made of 316L stainless steel housing and connector material, ensuring corrosion resistance in harsh environments. For optimal performance, mount the sensor directly on the bearing housing or as close to the bearing as possible, using a clean, flat surface. Allow the adhesive cure time of 24 hours if using adhesive mounting. The accelerometer operates in temperatures from -40 °C to +105 °C (-40 °F to +221 °F), with storage capability from -55 °C to +121 °C (-67 °F to +250 °F).

Maintenance & Reliability

Routine inspection of the accelerometer and its cabling is recommended to ensure signal integrity. The hermetically sealed design (5×10⁻⁸ atm·cc/s maximum leakage) protects against moisture and contaminants, even in 100% condensing humidity environments. The ceramic shear sensing element provides long-term stability and resistance to thermal drift. By integrating the 200157-06-05 into a regular calibration schedule, users maintain measurement accuracy and avoid costly false alarms or missed faults. This reliability translates directly into lower total cost of ownership for critical asset monitoring.

Selection Guide & Purchasing Advice

When selecting the Bently Nevada 200157-06-05, verify that your monitoring system supports the ProTIM option with standard acceleration-to-velocity and acceleration enveloping channel type (-06). Confirm the mounting thread compatibility with your installation point. The unit weighs 58 g (2.0 oz) typically and has a hex size of 17.5 mm x 45.7 mm (11/16 in x 1.8 in). For complete technical specifications and current availability, please contact BluePLC Industrial. Our team can assist with compatibility checks and provide pricing for both new units and qualified refurbished options.