Bently Nevada 200155-20-05 Low Frequency Trendmaster Pro Accelerometer

Introduction

In the evolution of industrial machinery monitoring, the need to capture low-frequency vibrations from slow-rotating equipment has become critical. The Bently Nevada 200155-20-05 Low Frequency Trendmaster Pro Accelerometer addresses this challenge with precision and reliability. Designed for applications such as fin-fan cooling towers and slow-rotating shafts, this sensor provides accurate acceleration data to help prevent unplanned downtime. With multiple approvals including CSA, ATEX, and IECEx, it is suitable for hazardous environments.

Technical Specifications

The 200155-20-05 offers 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 response spans from low to 10,000 Hz (90 to 600,000 cpm), referenced to 80 Hz. The mounted resonant frequency exceeds 20 kHz (>1200 kcpm), and amplitude linearity is within ±2% (1 to 10 g pk). Transverse sensitivity is ≤7%. Settling time is ≤2000 ms. Excitation voltage is 4.7 to 5.5 Vdc, with quiescent current <800 µA and output bias voltage +2.5 ± 0.23 Vdc. Environmental ratings include axial shock limit 49,050 m/s² pk (5,000 g pk), temperature range -40 °C to +105 °C, hermetic sealing, and 100% condensing humidity. Physical size is 17.5 mm x 45.7 mm, weight 58 g, with 3/8-24 female mounting thread and mounting torque 2.7 to 6.8 N·m. Sensing element is ceramic, shear geometry, housing in 316L stainless steel.

Industry Applications

This accelerometer excels in fin-fan cooling tower monitoring, where low-frequency vibrations from slow-rotating fans must be captured to detect bearing wear or imbalance. It is also ideal for monitoring slow-rotating shafts in pumps, compressors, and agitators. The low-frequency response ensures early fault detection, reducing maintenance costs and extending equipment life.

Installation & Setup Guidance

Mount the 200155-20-05 using the 3/8-24 female thread with a magnetic mount base (option 20). Apply mounting torque between 2.7 to 6.8 N·m. Ensure the mounting surface is clean and flat for optimal coupling. Connect the sensor to a compatible ProTIM option Low Frequency Acceleration-to-Velocity channel type (-05) for signal conditioning. Allow 24 hours cure time for adhesive mounts if used.

Maintenance & Reliability

Inspect the sensor and cable periodically for physical damage or corrosion, especially in humid or harsh environments. The hermetically sealed 316L stainless steel housing protects against moisture and contaminants. Verify output bias voltage periodically to ensure sensor health. Follow manufacturer guidelines for calibration intervals.

Selection Guide & Purchasing Advice

When ordering, verify the mounting stud option (20 = 3/8-24 thread with magnetic base) and approvals (05 = CSA, ATEX, IECEx). Ensure compatibility with your monitoring system. For complete technical specifications, contact BluePLC Industrial. Our team can help you select the right accelerometer for your application.