200155-15-05 | Bently Nevada 100 mV/g Low Frequency Accelerometer

Introduction to the 200155-15-05

When monitoring slow rotating shafts and fin-fan applications, the 200155-15-05 from Bently Nevada provides reliable low-frequency vibration data. This Low Frequency Trendmaster Pro Accelerometer is engineered for precise measurement in demanding industrial environments.

With a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, the 200155-15-05 captures subtle vibrations that standard accelerometers might miss. Its ceramic shear sensing element ensures accuracy and stability over time.

Key Features & Technical Specs

• Sensitivity: 10.2 mV/(m/s²) ±12% at 80 Hz (100 mV/g)
• Measurement range: ±196 m/s² (±20 g)
• Frequency range: 1.5 to 10,000 Hz (90 to 600,000 cpm)
• 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

One distinctive spec is the low-frequency capability down to 1.5 Hz. This allows the 200155-15-05 to detect early bearing wear and imbalance in slow-speed machinery, preventing costly unplanned downtime.

Real-World Applications

Engineers commonly use the 200155-15-05 on fin-fan coolers, cooling tower fans, and other slow-rotating equipment. Its low-frequency response makes it ideal for monitoring shafts rotating below 300 RPM. Additionally, the accelerometer works well in harsh environments thanks to its 316L stainless steel housing and hermetic sealing.

For example, in a petrochemical plant, the 200155-15-05 helps detect developing faults in large-diameter fans before they cause catastrophic failure. This proactive approach reduces maintenance costs and extends equipment life.

Installation & Setup

Mount the 200155-15-05 using its 3/8-24 female thread and apply a mounting torque of 2.7 to 6.8 N·m (2 to 5 ft·lbf). The mounting stud option 15 provides a 3/8-24 to 3/8-16 UNC adapter with a 3/4 inch hex stud for secure attachment.

After installation, allow a 24-hour cure time before taking critical measurements. Connect the accelerometer to a compatible ProTIM option Low Frequency Acceleration-to-Velocity channel type (-05) for optimal performance.

Routine Care & Reliability

The 200155-15-05 operates reliably across a temperature range of -40 °C to +105 °C (-40 °F to +221 °F). Its hermetic sealing (5×10⁻⁸ atm·cc/s max) protects against moisture and contaminants. Inspect the cable and connector periodically for signs of wear or damage.

Because the accelerometer uses a ceramic shear element, it resists transverse vibrations and maintains accuracy over time. Regular calibration checks every 12 months help ensure consistent performance.

Compatibility & Integration

The 200155-15-05 works with Bently Nevada ProTIM systems that support the Low Frequency Acceleration-to-Velocity channel type (-05). It is approved for use in hazardous areas with multiple approvals: CSA, ATEX, and IECEx (option 05).

For integration, ensure the excitation voltage matches the 4.7 to 5.5 Vdc requirement. The accelerometer outputs a positive signal (SIG+ positive with respect to SIG-) when acceleration is from base to connector.

Common Questions about the 200155-15-05

Q: What is the sensitivity of the 200155-15-05?

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

Q: What frequency range does this accelerometer cover?

A: It covers 1.5 to 10,000 Hz (90 to 600,000 cpm) referenced to 80 Hz.

Q: What is the measurement range?

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

Q: What approvals does the 200155-15-05 have?

A: It has multiple approvals: CSA, ATEX, and IECEx (option 05).

Q: What is the operating temperature range?

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

Product Support & Availability

The 200155-15-05 is available from Petro Auto Tech. Please verify current lifecycle status and availability with Petro Auto Tech before ordering. In-stock units ship promptly to minimize downtime.