200155-02-05 | Bently Nevada 100 mV/g Low Frequency Accelerometer

Introduction to the Bently Nevada 200155-02-05

When slow rotating shafts and fin-fan applications demand precise vibration monitoring, the 200155-02-05 provides a reliable solution. This low frequency Trendmaster Pro accelerometer from Bently Nevada offers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz. Designed for use with the ProTIM option Low Frequency Acceleration-to-Velocity channel type (-05), it excels in measuring vibrations down to 1.5 Hz (90 cpm).

Key Features and Technical Specifications of the 200155-02-05

• Sensitivity at 80 Hz: 10.2 mV/(m/s²) ±12% (100 mV/g).
• 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 ±10%.
• Mounted resonant frequency: >20 kHz (>1200 kcpm).
• Amplitude linearity: ±2% from 1 to 10 g peak.
• 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.

A standout feature is the low frequency capability down to 1.5 Hz, enabling accurate vibration data from slow-speed machinery where standard accelerometers fall short.

Applications and Use Cases for the 200155-02-05

This accelerometer is specifically designed for fin-fan and slow rotating shaft applications. In industries such as oil and gas, power generation, and petrochemical, slow-speed equipment like cooling tower fans and large-diameter shafts require low-frequency vibration monitoring. The 200155-02-05 delivers reliable data for predictive maintenance, helping to prevent unplanned downtime. Its rugged construction and multiple approvals (CSA, ATEX, IECEx) make it suitable for hazardous environments.

Installation and Mounting Guide

The 200155-02-05 features a 3/8-24 female mounting thread and comes with a 3/8-24 to 3/8-24 UNF 1-3/8 inch hex plate stud (mounting stud option 02). Recommended mounting torque is 2.7 to 6.8 N·m (2 to 5 ft·lbf). Ensure the mounting surface is clean and flat to achieve optimal coupling. The housing and connector are made of 316L stainless steel for corrosion resistance. After installation, allow a cure time of 24 hours before taking critical measurements.

Maintenance and Reliability Tips

Regular inspection of the accelerometer and its mounting is essential for long-term reliability. Check for any signs of physical damage or corrosion, especially in harsh environments. The hermetic sealing (5x10⁻⁸ atm·cc/s max) protects internal components from moisture and contaminants. Periodic verification of output bias voltage and sensitivity can help detect drift early. Following the manufacturer's guidelines ensures consistent performance over the product's service life.

Compatibility and Integration

The 200155-02-05 is designed to work with Bently Nevada's ProTIM monitoring systems, specifically the Low Frequency Acceleration-to-Velocity channel type (-05). It provides a standard analog output with positive polarity (SIG+ positive with respect to SIG-). Integration into existing vibration monitoring networks is straightforward, and the accelerometer's specifications align with industry-standard data acquisition systems.

Frequently Asked Questions about the 200155-02-05

What is the sensitivity of the Bently Nevada 200155-02-05?

The sensitivity at 80 Hz is 10.2 mV/(m/s²) ±12%, equivalent to 100 mV/g.

What is the frequency range of the 200155-02-05?

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

What mounting thread does the 200155-02-05 use?

It uses a 3/8-24 female mounting thread and includes a 3/8-24 to 3/8-24 UNF 1-3/8 inch hex plate stud.

What approvals does the 200155-02-05 have?

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

What is the operating temperature range for the 200155-02-05?

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

Product Support and Availability

The Bently Nevada 200155-02-05 is available from Petro Auto Tech. Please verify current lifecycle status and availability with Petro Auto Tech before ordering. In stock and ready to ship for most orders.