Bently Nevada 200155-21-05 Low Frequency Trendmaster Pro Accelerometer

Product Overview

When monitoring slow rotating shafts in fin-fan applications, the Bently Nevada 200155-21-05 Low Frequency Trendmaster Pro Accelerometer delivers reliable vibration data. This sensor is designed for low-frequency acceleration-to-velocity measurements, helping you detect early signs of mechanical wear and avoid unplanned downtime.

Technical Specifications

The 200155-21-05 features a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a measurement range of ±196 m/s² (±20 g). Its frequency range spans 1.5 to 10,000 Hz (90 to 600,000 cpm), and the mounted resonant frequency exceeds 20 kHz (>1200 kcpm). Amplitude linearity is ±2% (1 to 10 g pk), and transverse sensitivity is ≤7%. The accelerometer settles within 5% of bias in ≤2000 ms. Excitation voltage is 4.7 to 5.5 Vdc, quiescent current is <800 µA, and output bias voltage is +2.5 ± 0.23 Vdc. For low-range measurements, it also supports 24.5 mm/s² (2.5 mg).

Industry Applications

This accelerometer excels in fin-fan and slow rotating shaft monitoring, where low-frequency vibration data is critical for predictive maintenance. By catching imbalances or bearing degradation early, you reduce repair costs and extend equipment life. The 200155-21-05’s sensitivity and range make it a cost-effective choice for continuous condition monitoring in refineries, power plants, and heavy industrial settings.

Installation & Setup Guidance

Mount the 200155-21-05 using its 3/8-24 female thread with a mounting stud option of 3/8-24 outer diameter to M6x1 inner diameter (1-3/8 inch hex plate stud). Apply a mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). Ensure the surface is clean and flat for optimal coupling. The sensor is hermetically sealed to 5x10⁻⁸ atm•cc/s maximum, and operates in 100% relative humidity (condensing, non-submerged).

Maintenance & Reliability

Routine inspection of the accelerometer and its cable connections helps maintain measurement accuracy. The 316L stainless steel housing and ceramic shear sensing element provide long-term durability in harsh environments. With an axial shock limit of 49,050 m/s² pk (5,000 g pk) and a temperature range of -40 °C to +105 °C (-40 °F to +221 °F), this unit withstands demanding conditions, reducing total cost of ownership.

Selection Guide & Purchasing Advice

Before ordering the 200155-21-05, verify your system’s excitation voltage (4.7 to 5.5 Vdc) and mounting thread compatibility. The multiple approvals (CSA, ATEX, and IECEx) ensure global usability. For complete technical specifications and current availability, contact BluePLC Industrial. We stock genuine Bently Nevada parts to support your maintenance needs.