Product Overview
When fin-fan cooling towers or slow rotating shafts demand precise low-frequency vibration monitoring, the Bently Nevada 200155-05-CN Low Frequency Trendmaster Pro Accelerometer delivers reliable performance. This accelerometer, part of the Trendmaster Pro family, provides accurate acceleration measurements down to 1.5 Hz, making it essential for detecting early bearing wear and imbalance in large rotating machinery. With a sensitivity of 10.2 mV/(m/s²) at 80 Hz, it captures subtle vibrations that standard accelerometers miss.
Technical Specifications Breakdown
The 200155-05-CN offers a measurement range of ±196 m/s² (±20 g) and operates across a frequency range of 1.5 to 10,000 Hz (90 to 600,000 cpm). Its mounted resonant frequency exceeds 20 kHz, ensuring reliable data up to high frequencies. Amplitude linearity stays within ±2% from 1 to 10 g peak, while transverse sensitivity is ≤7%. The accelerometer settles within 5% of bias in ≤2000 ms, ideal for quick response after power-up. Excitation voltage ranges from 4.7 to 5.5 Vdc, with a quiescent current under 800 µA and output bias voltage of +2.5 ± 0.23 Vdc. These parameters ensure stable, repeatable measurements in demanding industrial environments.
Industry Applications
In fin-fan air-cooled heat exchangers, the 200155-05-CN monitors low-speed fan bearings and gearboxes, where traditional accelerometers struggle due to low vibration frequencies. For slow rotating shafts (e.g., in paper mills or cement kilns), this accelerometer detects early signs of unbalance or misalignment, preventing unplanned downtime. Its hermetic sealing (5×10⁻⁸ atm·cc/s maximum) and 100% relative humidity tolerance allow deployment in outdoor or washdown areas without failure.
Installation & Setup Guidance
Mount the 200155-05-CN 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 included hex plate stud (option -05, 3/8-24 to 1/4-28 UNF, 1-3/8 inch) simplifies installation on existing studs. Ensure the mounting surface is clean and flat for optimal frequency response. After mounting, allow 24 hours cure time if adhesive is used. Connect excitation voltage between 4.7 and 5.5 Vdc, observing polarity: SIG+ positive with respect to SIG-.
Maintenance & Reliability
Routine inspection of the accelerometer and its cable connections ensures long-term reliability. The 316L stainless steel housing and connector resist corrosion in harsh environments. Operating temperature range from -40 °C to +105 °C (-40 °F to +221 °F) suits most industrial settings. The ceramic shear sensing element provides stable performance over time, reducing the need for frequent recalibration. For maximum uptime, verify output bias voltage periodically; deviations beyond +2.5 ± 0.23 Vdc may indicate sensor degradation.
Selection Guide & Purchasing Advice
Before ordering the 200155-05-CN, confirm your application requires low-frequency capability (1.5 Hz minimum) and that your data acquisition system supports the 10.2 mV/(m/s²) sensitivity. The CN approval indicates country-specific certification; verify compatibility with your local standards. SpareTechPLC stocks this accelerometer and can advise on mating cables or mounting accessories. Contact us to confirm current lifecycle status and availability.
Frequently Asked Questions
Q: What is the sensitivity of the 200155-05-CN?
A: The sensitivity is 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a tolerance of ±12%.
Q: Can this accelerometer be used in high-humidity environments?
A: Yes, it operates in 100% relative humidity, condensing, non-submerged conditions, and features hermetic sealing.
Q: What mounting thread does the 200155-05-CN use?
A: It uses a 3/8-24 female thread. The included hex plate stud adapts from 3/8-24 to 1/4-28 UNF.
Q: What is the maximum axial shock the accelerometer can withstand?
A: The axial shock limit is 49,050 m/s² peak (5,000 g peak).
Q: Does this accelerometer require a specific excitation voltage?
A: Yes, it requires 4.7 to 5.5 Vdc excitation, with quiescent current under 800 µA.
