200155-11-05 | Bently Nevada 100 mV/g Low Frequency Accelerometer

Introduction to the 200155-11-05

When slow rotating shafts and fin-fan applications demand reliable low-frequency vibration data, the 200155-11-05 from Bently Nevada provides a robust solution. This Low Frequency Trendmaster Pro Accelerometer is engineered for continuous monitoring in challenging environments. With a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, it captures subtle vibrations that standard accelerometers may miss. The 200155-11-05 is designed for use with the ProTIM Option Low Frequency Acceleration-to-Velocity channel type (-05).

Key Features & Technical Specs

• Sensitivity: 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, ±12%.
• Measurement Range: ±196 m/s² (±20 g).
• 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.
• Output Bias Voltage: +2.5 ± 0.23 Vdc.
• Quiescent Current: <800 µA.
• Temperature Range: -40 °C to +105 °C (-40 °F to +221 °F).
• Weight: 58 g (2.0 oz), typical.
• Housing Material: 316L stainless steel.

A standout spec is the low frequency range down to 1.5 Hz, which enables accurate monitoring of slow-speed machinery where traditional accelerometers lose sensitivity.

Applications & Use Cases

The 200155-11-05 excels in monitoring fin-fan coolers and slow rotating shafts—applications where vibration frequencies are inherently low. In a typical fin-fan installation, the accelerometer attaches via a 3/8-24 female mounting thread and a 3/8-24 to 1-1/4 NPT stud (option 11). Its hermetically sealed 316L stainless steel housing withstands 100% condensing humidity and temperatures up to +105 °C. Consequently, it provides reliable data for predictive maintenance programs, helping to prevent unexpected downtime.

Installation & Setup

Mount the 200155-11-05 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 requires an excitation voltage between 4.7 and 5.5 Vdc. After power-up, allow up to 2000 ms settling time before taking measurements. The output bias voltage should be +2.5 ± 0.23 Vdc; any significant deviation may indicate a wiring or sensor issue. Always follow the manufacturer's guidelines for cable routing and connector care to maintain signal integrity.

Maintenance & Reliability

Regular inspection of the accelerometer and its mounting is essential for long-term accuracy. Check the mounting torque periodically, as loosening can affect frequency response. The hermetic seal (5×10⁻⁸ atm·cc/s max) protects internal components from moisture, but verify the cable and connector for damage after exposure to harsh conditions. With proper care, the 200155-11-05 delivers consistent performance over many years, reducing total cost of ownership.

Compatibility & Integration

The 200155-11-05 works with the ProTIM Option Low Frequency Acceleration-to-Velocity channel type (-05). It is approved for use in hazardous areas with multiple certifications: CSA, ATEX, and IECEx (option 05). For system integration, refer to the Bently Nevada monitoring system documentation to ensure proper configuration of the channel type and sensitivity settings.

FAQs about the 200155-11-05

What is the sensitivity of the 200155-11-05?

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 mounting thread does the 200155-11-05 use?

It uses a 3/8-24 female mounting thread, and the mounting stud option 11 provides a 3/8-24 to 1-1/4 NPT adapter.

What is the operating temperature range?

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

What approvals does the 200155-11-05 have?

Option 05 includes multiple approvals: CSA, ATEX, and IECEx.

Product Support & Availability

The 200155-11-05 is available from Petro Auto Tech, an industrial automation parts supplier. In stock and ready to ship, this accelerometer can be ordered directly. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.