200157-18-05 | Bently Nevada 10.2 mV/(m/s²) Enveloping Trendmaster Pro Accelerometer

Introduction to the Bently Nevada 200157-18-05

When roller element bearing failures threaten production uptime, the 200157-18-05 from Bently Nevada provides reliable early detection. This Enveloping Trendmaster Pro Accelerometer is designed for continuous vibration monitoring in demanding industrial environments. With a sensitivity of 10.2 mV/(m/s²) at 80 Hz, it captures subtle changes in machinery condition before they escalate into costly breakdowns.

Key Features and Technical Specifications

The 200157-18-05 offers a measurement range of ±245 m/s² (±25 g) and a frequency range of 10 to 10,000 Hz (600 to 600,000 cpm). Its mounted resonant frequency exceeds 20 kHz, ensuring accurate readings across a wide spectrum. 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, enabling quick response to vibration changes.

• Sensitivity: 10.2 mV/(m/s²) ±12% at 80 Hz
• Measurement Range: ±245 m/s² (±25 g)
• Frequency Range: 10 to 10,000 Hz (600 to 600,000 cpm)
• Excitation Voltage: 4.7 to 5.5 Vdc
• Quiescent Current: <800 µA
• Output Bias Voltage: +2.5 ± 0.23 Vdc
• Temperature Range: -40 °C to +105 °C
• Weight: 58 g (2.0 oz), typical

Applications and Use Cases

This accelerometer is specifically designed for roller element bearing monitoring and detecting cavitation effects. In rotating machinery, the 200157-18-05 identifies early-stage bearing wear, imbalance, and misalignment. It excels in applications where enveloping technology is required to extract fault signatures from background noise. Consequently, maintenance engineers can schedule repairs proactively, reducing unplanned downtime.

Installation and Setup

Mount the 200157-18-05 using its 3/8-24 female thread and apply a mounting torque of 2.7 to 6.8 N·m (2 to 5 ft·lbf). The included stud option (18 3/8-24 to M8x1, 1-3/8 inch hex plate) simplifies installation on various machine surfaces. Ensure the mounting surface is clean and flat for optimal signal transfer. After installation, allow 24 hours cure time if adhesive is used.

Maintenance and Reliability

Regular inspection of the accelerometer and its cable connections helps maintain measurement accuracy. The hermetically sealed 316L stainless steel housing protects against moisture and contaminants, with a sealing rating of 5x10⁻⁸ atm·cc/s maximum. Periodically verify the output bias voltage remains within +2.5 ± 0.23 Vdc. For long-term reliability, follow the manufacturer's guidelines for periodic calibration.

Compatibility and Integration

The 200157-18-05 works with Bently Nevada ProTIM modules that support standard acceleration-to-velocity with acceleration enveloping channel type (-06). It is compatible with data acquisition systems that provide 4.7 to 5.5 Vdc excitation and accept a 10.2 mV/(m/s²) sensitivity input. Multiple approvals (CSA, ATEX, and IECEx) ensure suitability for hazardous area installations.

Frequently Asked Questions

What is the sensitivity of the 200157-18-05 accelerometer?

The sensitivity is 10.2 mV/(m/s²) ±12% at 80 Hz.

What is the measurement range of this accelerometer?

It has a measurement range of ±245 m/s² (±25 g).

What temperature range can the 200157-18-05 operate in?

It operates from -40 °C to +105 °C.

What mounting thread does the accelerometer use?

It uses a 3/8-24 female thread.

What approvals does the 200157-18-05 have?

It has multiple approvals including CSA, ATEX, and IECEx.

Product Support and Availability

The Bently Nevada 200157-18-05 is available from Petro Auto Tech. Please verify current lifecycle status and availability before ordering. Our team can assist with technical inquiries and expedite shipping for urgent needs.