200157-15-05 | Bently Nevada 10.2 mV/(m/s²) Enveloping Trendmaster Pro Accelerometer

Introduction to the 200157-15-05 Bently Nevada Accelerometer

When roller element bearing failures or cavitation effects threaten uptime, the 200157-15-05 provides reliable vibration data. This Bently Nevada Enveloping Trendmaster Pro Accelerometer is designed for continuous monitoring in harsh industrial environments. With a sensitivity of 10.2 mV/(m/s²) at 80 Hz, it captures subtle vibration changes before they escalate.

Manufactured in the U.S.A., the 200157-15-05 is part of the Trendmaster Pro family. It supports acceleration-to-velocity conversion with acceleration enveloping channel type (-06). This makes it ideal for detecting early-stage bearing defects and cavitation in rotating machinery.

Key Features and Technical Specifications

• Sensitivity: 10.2 mV/(m/s²) ±12% at 80 Hz (100 mV/g).
• Measurement Range: ±245 m/s² (±25 g) for acceleration.
• Frequency Range: 10 to 10,000 Hz (600 to 600,000 cpm) referenced to 80 Hz.
• Mounted Resonant Frequency: >20 kHz (>1200 kcpm).
• Amplitude Linearity: ±2% (1 to 10 g pk).
• Transverse Sensitivity: ≤7%.
• Settling Time: ≤300 ms (within 5% of bias).
• Excitation Voltage: 4.7 to 5.5 Vdc.
• Output Bias Voltage: +2.5 ± 0.23 Vdc.
• Temperature Range: -40 °C to +105 °C (-40 °F to +221 °F).
• Sealing: Hermetic, 5×10⁻⁸ atm·cc/s max.
• Weight: 58 g (2.0 oz), typical.
• Mounting Thread: 3/8-24 female; mounting torque 2.7 to 6.8 N·m (2 to 5 ft·lbf).

The ceramic shear sensing element and 316L stainless steel housing (200155) ensure durability in condensing, non-submerged environments up to 100% relative humidity.

Applications and Use Cases

Engineers rely on the 200157-15-05 for roller element bearing monitoring and detecting cavitation effects in pumps, compressors, and turbines. Its acceleration enveloping capability isolates high-frequency impacts from background vibration. This makes it particularly effective for early fault detection in rotating equipment. The accelerometer operates reliably from -40 °C to +105 °C, suiting both cold climates and hot machinery compartments.

Installation and Mounting Guidance

Mount the 200157-15-05 using the 3/8-24 female thread with a stud option of 3/8-24 to 3/8-16 UNC (3/4 inch hex stud). Apply mounting torque between 2.7 and 6.8 N·m (2 to 5 ft·lbf) for optimal coupling. Allow 24 hours cure time for any adhesive if used. Ensure the base-to-connector acceleration polarity is positive (SIG+ with respect to SIG-). The accelerometer settles within 300 ms after power-up, so wait before taking measurements.

Maintenance and Reliability

Periodically inspect the accelerometer for physical damage or corrosion, especially in condensing humidity environments. The hermetic seal (5×10⁻⁸ atm·cc/s max) protects internal components. Avoid exceeding the axial shock limit of 49,050 m/s² pk (5,000 g pk). For long-term reliability, verify output bias voltage stays within +2.5 ± 0.23 Vdc. Follow Bently Nevada guidelines for calibration intervals.

Compatibility and Integration

The 200157-15-05 works with ProTIM option for standard acceleration-to-velocity with acceleration enveloping channel type (-06). It requires 4.7 to 5.5 Vdc excitation and outputs a signal of 10.2 mV/(m/s²). The multiple approvals (CSA, ATEX, and IECEx) indicate suitability for hazardous area installations. Contact Petro Auto Tech for integration support with Bently Nevada monitoring systems.

Frequently Asked Questions

Q: What is the sensitivity of the 200157-15-05?

A: The sensitivity is 10.2 mV/(m/s²) ±12% at 80 Hz (100 mV/g).

Q: What is the operating temperature range?

A: The accelerometer operates from -40 °C to +105 °C (-40 °F to +221 °F).

Q: What approvals does the 200157-15-05 carry?

A: It carries multiple approvals: CSA, ATEX, and IECEx.

Q: What is the mounting thread size?

A: The mounting thread is 3/8-24 female, with a stud option of 3/8-24 to 3/8-16 UNC.

Q: What is the measurement range for acceleration?

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

Product Support and Availability

The 200157-15-05 is available through Petro Auto Tech. Verify current lifecycle status before ordering. Contact our team for pricing and lead times.