200157-08-05 | Bently Nevada 100 mV/g Enveloping Trendmaster Pro Accelerometer

Introduction to the 200157-08-05 Bently Nevada Accelerometer

When machinery faults threaten uptime, the 200157-08-05 from Bently Nevada provides early warning. This Enveloping Trendmaster Pro accelerometer is designed for roller element bearing analysis and cavitation detection. With a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, it captures subtle vibration signatures. The unit operates with an excitation voltage of 4.7 to 5.5 Vdc and a quiescent current under 800 µA. Its output bias voltage is +2.5 ± 0.23 Vdc, ensuring reliable signal transmission.

Key Features and Technical Specifications of the 200157-08-05

• Sensitivity: 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, ±12%.
• Measurement Range: ±245 m/s² (±25 g) for acceleration; 14.7 mm/s² (1.5 mg) for enveloping.
• Frequency Range: 10 to 10,000 Hz (600 to 600,000 cpm), referenced to 80 Hz.
• Mounted Resonant Frequency: Greater than 20 kHz (>1200 kcpm).
• Amplitude Linearity: ±2% from 1 to 10 g pk.
• Transverse Sensitivity: ≤7%.
• Settling Time: ≤300 ms within 5% of bias.
• Excitation Voltage: 4.7 to 5.5 Vdc.
• Quiescent Current: <800 µA.
• Output Bias Voltage: +2.5 ± 0.23 Vdc.

A standout feature is the enveloping channel type (-06), which extracts bearing fault signatures from high-frequency noise. This capability directly addresses the challenge of detecting early-stage bearing degradation before catastrophic failure occurs.

Applications and Use Cases for the 200157-08-05

Engineers rely on the 200157-08-05 for monitoring rolling element bearings in pumps, motors, and gearboxes. Its enveloping technology also excels at identifying cavitation effects in fluid-handling equipment. For example, in a chemical processing plant, the accelerometer can detect subtle bearing wear patterns that standard vibration sensors miss. This proactive approach reduces unplanned downtime and extends equipment life.

Installation and Setup Guidance

Mount the 200157-08-05 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 08 provides a 3/8-24 to 1/2 NPT adapter with a 1-inch hex stud. Ensure the sensor is securely fastened to a flat, clean surface for optimal signal fidelity. Allow up to 24 hours for the ceramic sensing element to cure after initial installation.

Maintenance and Reliability Tips

Regular inspection of the accelerometer and its cabling helps maintain measurement accuracy. The hermetically sealed housing (316L stainless steel) protects against moisture and contaminants, with a sealing rate of 5×10⁻⁸ atm·cc/s maximum. Operate within the temperature range of -40 °C to +105 °C (-40 °F to +221 °F) to avoid drift. Periodic verification of output bias voltage ensures the sensor remains within specification.

Compatibility and Integration

The 200157-08-05 works with the ProTIM option for standard acceleration-to-velocity conversion with acceleration enveloping. It is compatible with Bently Nevada monitoring systems that accept 100 mV/g inputs. For integration details, consult the official Bently Nevada documentation or contact Petro Auto Tech.

Frequently Asked Questions about the 200157-08-05

What is the sensitivity of the 200157-08-05?

The sensitivity is 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a tolerance of ±12%.

What is the measurement range for acceleration?

The acceleration measurement range is ±245 m/s² (±25 g).

What temperature range can the 200157-08-05 withstand?

The operating temperature range is -40 °C to +105 °C (-40 °F to +221 °F).

What approvals does the 200157-08-05 have?

The unit carries multiple approvals: CSA, ATEX, and IECEx.

What is the mounting thread size?

The mounting thread is 3/8-24 female, with a recommended torque of 2.7 to 6.8 N·m.

Product Support and Availability

The 200157-08-05 is available from Petro Auto Tech. Please verify current lifecycle status and availability before ordering. Our team can assist with technical questions and expedite shipping for critical applications.