200155-20-05 | Bently Nevada 100 mV/g Low Frequency Accelerometer

Introduction: The Evolution of Low Frequency Vibration Monitoring

In the world of industrial automation, the ability to detect subtle vibrations in slow rotating machinery has become a critical factor in preventing unplanned downtime. As plants age and production demands increase, engineers have sought more sensitive tools to monitor assets like fin-fan coolers and slow speed shafts. The 200155-20-05 from Bently Nevada represents a significant step forward in this evolution, offering a specialized low frequency accelerometer that captures data where traditional sensors fall short.

With a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, this device provides the precision needed for early fault detection. Its design reflects decades of experience in vibration analysis, making it a reliable choice for condition monitoring programs.

Key Features & Technical Specs of the 200155-20-05

• Sensitivity: 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, ±12%.
• Measurement Range: ±196 m/s² (±20 g) for the accelerometer.
• 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% (1 to 10 g pk).
• Transverse Sensitivity: ≤7%.
• Settling Time: ≤2000 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 low frequency capability down to 1.5 Hz, which allows monitoring of slow rotating equipment that would otherwise go unchecked. This makes the 200155-20-05 ideal for applications where traditional accelerometers lack sensitivity.

Applications & Use Cases

The 200155-20-05 is specifically engineered for low frequency vibration monitoring. Common applications include fin-fan coolers, slow rotating shafts, and other machinery operating at reduced speeds. In a typical scenario, this accelerometer helps detect bearing wear or imbalance early, preventing costly repairs. Additionally, its hermetically sealed design (5X10⁻⁸ atm•cc/s maximum) ensures reliable operation in harsh environments, such as those with high humidity or temperature extremes.

Installation & Setup Guide

Mounting the 200155-20-05 requires attention to torque specifications. Use a mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf) on the 3/8-24 female thread. The mounting stud option includes a 3/8-24 thread with one magnetic mount base, simplifying attachment to ferrous surfaces. Ensure the sensor is securely fastened to avoid signal degradation. For optimal performance, allow a cure time of 24 hours after installation if adhesive is used. Always follow the manufacturer's guidelines for wiring and configuration.

Maintenance & Reliability Tips

To maintain accuracy, inspect the 200155-20-05 periodically for signs of physical damage or corrosion. The 316L stainless steel housing offers excellent resistance to environmental stressors, but regular checks ensure long-term reliability. Given its temperature range of -40 ºC to +105 ºC, the sensor can withstand extreme conditions. Routine calibration verification, as per the manufacturer's recommendations, helps sustain measurement integrity. By investing in preventive care, users can extend the service life of this accelerometer and reduce overall maintenance costs.

Compatibility & Integration

The 200155-20-05 is designed for use with the ProTIM option Low Frequency Acceleration-to-Velocity channel type (-05). It integrates seamlessly into Bently Nevada monitoring systems, providing accurate data for analysis. For best results, pair this accelerometer with compatible data acquisition hardware from the same manufacturer. Always verify system compatibility before installation.

FAQ about 200155-20-05

Q: What is the sensitivity of the 200155-20-05 accelerometer?

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

Q: What is the measurement range of this accelerometer?

A: The measurement range is ±196 m/s² (±20 g) for the accelerometer.

Q: What is the frequency range of the 200155-20-05?

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

Q: What is the excitation voltage required?

A: The excitation voltage is 4.7 to 5.5 Vdc.

Q: What approvals does the 200155-20-05 have?

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

Product Support & Availability

The 200155-20-05 is available from Petro Auto Tech, a trusted supplier of industrial automation parts. Contact our team for current stock levels and lead times. We are ready to assist with your order and provide technical support as needed.