Product Overview
When slow rotating shafts and fin-fan applications demand reliable vibration monitoring, the Bently Nevada 200155-14-05 Low Frequency Trendmaster Pro Accelerometer delivers precise measurements. This accelerometer solves the common problem of detecting low-frequency vibrations in machinery that operates below typical monitoring thresholds. With a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, it captures subtle movements that standard accelerometers miss.
Technical Specifications Breakdown
The 200155-14-05 offers a measurement range of ±196 m/s² (±20 g), ensuring it handles both normal operation and transient events. Its frequency range spans 1.5 to 10,000 Hz (90 to 600,000 cpm), making it suitable for low-speed equipment. The mounted resonant frequency exceeds 20 kHz, preventing structural interference. Amplitude linearity stays within ±2% from 1 to 10 g pk, providing accurate readings across the operating envelope. Transverse sensitivity is ≤7%, minimizing cross-axis errors.
Industry Applications
This accelerometer excels in two key scenarios. First, on fin-fan coolers where blade pass frequencies are low and require high sensitivity at sub-10 Hz ranges. Second, on slow rotating shafts such as those in pulp refiners or kilns, where traditional velocity sensors fail to detect early bearing wear. The 200155-14-05 connects to the ProTIM option with Low Frequency Acceleration-to-Velocity channel type (-05) for seamless integration.
Installation & Setup Guidance
Mount the 200155-14-05 using the 3/8-24 female thread. Apply a mounting torque between 2.7 to 6.8 N•m (2 to 5 ft•lbf). The mounting stud option is 14 3/8-24 to 3/8-24 UNF with a 3/4 inch hex stud. Ensure the surface is clean and flat to achieve optimal coupling. The accelerometer requires an excitation voltage of 4.7 to 5.5 Vdc. Allow up to 2000 ms settling time (within 5% of bias) after power-up before taking critical measurements.
Maintenance & Reliability
The hermetically sealed design achieves a leakage rate of 5x10⁻⁸ atm•cc/s maximum, protecting against moisture and contaminants. With a temperature range of -40 ºC to +105 ºC (-40 ºF to +221 ºF), it withstands harsh industrial environments. The 316L stainless steel housing and connector resist corrosion. Regular inspection of the mounting integrity and cable connections helps maintain reliability. The axial shock limit of 49,050 m/s² pk (5,000 g pk) ensures survival during unexpected impacts.
Selection Guide & Purchasing Advice
Before ordering the 200155-14-05, verify your system's excitation voltage (4.7 to 5.5 Vdc) and required approvals. This unit carries multiple approvals (CSA, ATEX, and IECEx) as indicated by the "05" suffix. Confirm that your monitoring system supports the Low Frequency Acceleration-to-Velocity channel type. SpareTechPLC stocks this Bently Nevada accelerometer and can advise on compatibility with your existing setup. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
