Product Overview
When monitoring slow-rotating shafts in fin-fan applications, the Bently Nevada 200155-04-05 Low Frequency Trendmaster Pro accelerometer delivers reliable vibration data. This sensor is engineered for low-frequency environments where standard accelerometers fall short. With a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, it captures subtle vibrations from 1.5 to 10,000 Hz (90 to 600,000 cpm). The 200155-04-05 is part of the Trendmaster Pro family, designed for continuous machinery protection and condition monitoring.
Technical Specifications Breakdown
Understanding key parameters helps you select the right sensor. The 200155-04-05 offers a measurement range of ±196 m/s² (±20 g) for acceleration and 24.5 mm/s² (2.5 mg) for low-level vibration. Its mounted resonant frequency exceeds 20 kHz (>1200 kcpm), ensuring accurate readings across the frequency band. Amplitude linearity is within ±2% from 1 to 10 g peak, while transverse sensitivity stays ≤7%. The accelerometer settles within 5% of bias in ≤2000 ms, making it responsive to changes. Excitation voltage is 4.7 to 5.5 Vdc, with a quiescent current below 800 µA and output bias voltage of +2.5 ± 0.23 Vdc.
Industry Applications
The 200155-04-05 excels in fin-fan and slow-rotating shaft applications. For example, in cooling tower fans, it detects early bearing wear or imbalance at low rotational speeds. In paper mill rollers, it monitors vibration trends to schedule maintenance before failure. The accelerometer's frequency range down to 1.5 Hz makes it ideal for machinery operating below 600 RPM, where conventional sensors lose sensitivity.
Installation & Setup Guidance
Mount the 200155-04-05 using the 3/8-24 female thread with a mounting torque of 2.7 to 6.8 N·m (2 to 5 ft·lbf). The mounting stud option 04 provides a 3/8-24 to 1/4 NPT adapter with a 1-3/8 inch hex plate stud. Ensure the mounting surface is clean and flat for optimal coupling. The sensor is hermetically sealed to 5×10⁻⁸ atm·cc/s maximum, so it withstands harsh environments. For best results, use the ProTIM option with Low Frequency Acceleration-to-Velocity channel type (-05).
Maintenance & Reliability
The 200155-04-05 operates from -40 °C to +105 °C (-40 °F to +221 °F) and survives axial shock up to 49,050 m/s² pk (5,000 g pk). With 100% relative humidity tolerance (condensing, non-submerged), it suits outdoor or washdown areas. The ceramic shear sensing element and 316L stainless steel housing resist corrosion. Periodic inspection of the mounting integrity and cable connections ensures long-term reliability. No internal maintenance is required; replace the unit if performance drifts.
Compatibility & Integration
This accelerometer integrates with Bently Nevada monitoring systems using the ProTIM option. It provides a SIG+ positive signal relative to SIG- for acceleration from base to connector. The multiple approvals (CSA, ATEX, and IECEx) allow installation in hazardous areas. Verify compatibility with your data acquisition system's excitation voltage (4.7 to 5.5 Vdc).
Selection Guide & Purchasing Advice
When ordering the 200155-04-05, confirm the mounting stud option (04) and approvals (05) match your site requirements. The accelerometer weighs 58 g (2.0 oz) typical and measures 17.5 mm x 45.7 mm (11/16 in x 1.8 in). SpareTechPLC stocks this model with fast shipping. Contact our team to verify current lifecycle status and availability before ordering.
Frequently Asked Questions
Q: What is the sensitivity of the 200155-04-05?
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 hazardous areas?
A: Yes, the 200155-04-05 has multiple approvals including CSA, ATEX, and IECEx (option 05).
Q: What is the maximum operating temperature?
A: The temperature range is -40 °C to +105 °C (-40 °F to +221 °F).
Q: How long does it take to settle after power-up?
A: Settling time is ≤2000 ms to within 5% of bias voltage.
Q: What mounting thread does it use?
A: The mounting thread is 3/8-24 female, with a stud option for 3/8-24 to 1/4 NPT.
