200155-19-05 | Bently Nevada 100 mV/g Low Frequency Accelerometer

Introduction to the 200155-19-05 Bently Nevada Accelerometer

When fin-fan and slow rotating shaft applications demand accurate vibration data, the 200155-19-05 from Bently Nevada provides a reliable solution. This Low Frequency Trendmaster Pro Accelerometer is engineered for low-speed machinery where standard sensors fall short. With a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, it captures subtle vibrations that indicate developing faults. The unit supports multiple approvals (CSA, ATEX, and IECEx), making it suitable for hazardous environments. Its compact design and robust construction help reduce unplanned downtime and extend equipment life.

Key Features & Technical Specifications of the 200155-19-05

• Sensitivity: 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, ±12%.
• Measurement range: ±196 m/s² (±20 g) peak.
• Frequency range: 1.5 to 10,000 Hz (90 to 600,000 cpm), referenced to 80 Hz.
• Mounted resonant frequency: >20 kHz (>1200 kcpm).
• Amplitude linearity: ±2% from 1 to 10 g pk.
• Transverse sensitivity: ≤7%.
• Settling time: ≤2000 ms (within 5% of bias).
• Excitation voltage: 4.7 to 5.5 Vdc.
• Output bias voltage: +2.5 ± 0.23 Vdc.
• Quiescent current: <800 µA.

One distinctive spec is the low-frequency response down to 1.5 Hz, which allows the 200155-19-05 to monitor slow-speed rotating equipment like fin-fan blades and cooling tower shafts. This capability helps detect bearing wear and imbalance early, preventing catastrophic failures.

Applications & Use Cases for the 200155-19-05

The 200155-19-05 is specifically designed for slow rotating shafts and fin-fan applications. It excels in environments where standard accelerometers cannot capture low-frequency vibrations accurately. Typical use cases include monitoring cooling tower fans, induced draft fans, and large slow-speed pumps. By providing reliable data from 1.5 Hz upward, it enables predictive maintenance strategies that reduce unplanned outages. Additionally, its hermetically sealed 316L stainless steel housing withstands harsh industrial conditions, including 100% condensing humidity.

Installation & Setup Guide

Mount the 200155-19-05 using the 3/8-24 female thread and apply a mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). The Quick-Set XDCR adapter (option 19) simplifies alignment and reduces installation time. Ensure the mounting surface is clean and flat for optimal coupling. After installation, allow up to 24 hours cure time for the mounting adhesive, if used. Connect the excitation voltage between 4.7 and 5.5 Vdc, observing correct polarity (SIG+ positive with respect to SIG-). Verify the output bias voltage is within +2.5 ± 0.23 Vdc before commissioning.

Maintenance & Reliability

Routine inspection of the 200155-19-05 involves checking cable integrity and connector tightness. The hermetically sealed design (leak rate ≤5×10⁻⁸ atm•cc/s) prevents moisture ingress, ensuring long-term reliability in condensing environments. Operating temperature range from -40 °C to +105 °C (-40 °F to +221 °F) suits most industrial settings. Periodic verification of sensitivity and bias voltage against baseline readings helps detect sensor degradation early, supporting cost-effective predictive maintenance.

Compatibility & Integration

The 200155-19-05 is designed for use with the ProTIM option Low Frequency Acceleration-to-Velocity channel type (-05). It integrates seamlessly into Bently Nevada monitoring systems that support this channel type. For systems requiring multiple approvals, the -05 option includes CSA, ATEX, and IECEx certifications, simplifying global deployment. Always verify system compatibility with your specific monitor or data collector before installation.

Troubleshooting & Common Issues

If the 200155-19-05 output bias voltage drifts outside +2.5 ± 0.23 Vdc, check the excitation voltage and cable connections. A quiescent current exceeding 800 µA may indicate internal damage. For noisy signals, verify that the mounting torque is within 2.7 to 6.8 N•m and that the mounting surface is free of debris. If the sensor fails to settle within 2000 ms, allow additional time or inspect for mechanical interference. For persistent issues, consult the official Bently Nevada documentation or contact Petro Auto Tech.

FAQ about 200155-19-05

What is the sensitivity of the 200155-19-05?

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

What is the frequency range of this accelerometer?

The frequency range is 1.5 to 10,000 Hz (90 to 600,000 cpm), referenced to 80 Hz.

What approvals does the 200155-19-05 carry?

It carries multiple approvals: CSA, ATEX, and IECEx (option -05).

What is the operating temperature range?

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

What mounting thread does the 200155-19-05 use?

It uses a 3/8-24 female mounting thread.

Product Support & Availability

The 200155-19-05 is available from Petro Auto Tech. Please verify current lifecycle status and availability with Petro Auto Tech before ordering. In-stock units are ready to ship for quick deployment.