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

Introduction to the 200155-05-CN Bently Nevada Accelerometer

When monitoring slow rotating shafts and fin-fan applications demands precise low-frequency vibration data, the 200155-05-CN from Bently Nevada provides a reliable solution. This Low Frequency Trendmaster Pro Accelerometer offers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, making it suitable for capturing subtle vibrations. Designed for industrial environments, it operates within a temperature range of -40 °C to +105 °C and features hermetic sealing for durability.

Key Features and Technical Specifications of the 200155-05-CN

• Sensitivity: 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, ±12%.
• Measurement Range: ±196 m/s² (±20 g) for acceleration.
• Frequency Range: 1.5 to 10,000 Hz (90 to 600,000 cpm).
• Excitation Voltage: 4.7 to 5.5 Vdc.
• Output Bias Voltage: +2.5 ± 0.23 Vdc.
• Quiescent Current: <800 µA.
• Temperature Range: -40 °C to +105 °C.
• Weight: 58 g (2.0 oz), typical.
• Mounting Thread: 3/8-24 female.
• Housing Material: 316L stainless steel.

A distinctive feature is its low-frequency capability down to 1.5 Hz, which is critical for detecting early bearing wear on slow-speed machinery. This spec enables the 200155-05-CN to outperform standard accelerometers in applications where rotational speeds are below 100 RPM.

Applications and Use Cases for the 200155-05-CN

The 200155-05-CN is specifically engineered for fin-fan cooling towers and slow rotating shafts. Its low-frequency response (1.5 Hz) makes it ideal for monitoring large fans, pumps, and compressors that operate at low speeds. Compared to general-purpose accelerometers, this model provides accurate vibration data in the sub-10 Hz range, helping prevent unexpected failures. Additionally, its rugged stainless steel housing and hermetic seal allow reliable operation in humid or condensing environments.

Installation and Setup Guide

Mount the 200155-05-CN 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 accelerometer includes a -05 mounting stud option (3/8-24 to 1/4-28 UNF hex plate stud). Ensure the mounting surface is clean and flat for optimal coupling. Connect the excitation voltage between 4.7 and 5.5 Vdc, observing polarity: SIG+ positive with respect to SIG-. Allow up to 2000 ms settling time after power-up before taking measurements.

Maintenance and Reliability Tips

Regularly inspect the 200155-05-CN for physical damage or corrosion, especially in harsh environments. The accelerometer's ceramic shear sensing element and 316L stainless steel housing provide long-term stability. Periodic verification of output bias voltage (2.5 ± 0.23 Vdc) can indicate sensor health. Follow manufacturer guidelines for calibration intervals to maintain accuracy.

Compatibility and Integration

The 200155-05-CN is designed for use with Bently Nevada ProTIM systems that support Low Frequency Acceleration-to-Velocity channel types. It outputs a standard analog signal compatible with most Bently Nevada monitoring platforms. For integration with third-party systems, verify the excitation voltage (4.7 to 5.5 Vdc) and signal requirements.

Frequently Asked Questions about the 200155-05-CN

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

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 is the maximum operating temperature?

The temperature range is -40 °C to +105 °C.

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

It uses a 3/8-24 female thread with a mounting torque of 2.7 to 6.8 N·m.

Is the 200155-05-CN suitable for slow-speed machinery?

Yes, its low-frequency response down to 1.5 Hz makes it ideal for slow rotating shafts and fin-fan applications.

Product Support and Availability

The 200155-05-CN is available from Petro Auto Tech. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.