Introduction
As industrial machinery evolves, detecting early signs of bearing wear and cavitation becomes critical for preventing costly downtime. The Bently Nevada 200157-18-05 Enveloping Trendmaster Pro accelerometer addresses this challenge with precision and durability. Designed for roller element bearing and certain cavitation effects, this sensor provides reliable data for predictive maintenance programs.
Technical Specifications Breakdown
The 200157-18-05 delivers a sensitivity of 10.2 mV/(m/s²) at 80 Hz, ensuring accurate vibration measurements. Its measurement range spans ±245 m/s², covering a wide spectrum of industrial vibrations. The frequency range extends from 10 to 10,000 Hz, suitable for monitoring rotating equipment. With a mounted resonant frequency above 20 kHz, the sensor avoids resonance interference in typical applications. Amplitude linearity remains within ±2% for 1 to 10 g pk, and transverse sensitivity is ≤7%, minimizing cross-axis errors.
Excitation voltage ranges from 4.7 to 5.5 Vdc, and the quiescent current is less than 800 µA. The output bias voltage sits at +2.5 ± 0.23 Vdc. Settling time is ≤300 ms, allowing quick stabilization after power-up. The accelerometer uses a ceramic shear sensing element housed in 316L stainless steel, ensuring robust performance.
Industry Applications
In the oil and gas sector, the 200157-18-05 monitors roller element bearings in pumps and compressors, detecting early faults before catastrophic failure. For power generation, it tracks cavitation effects in turbine feed pumps, helping optimize maintenance schedules. Its wide temperature range (-40 °C to +105 °C) suits harsh environments like steel mills or chemical plants.
Installation & Setup Guidance
Mount the accelerometer using the 3/8-24 female thread with a torque of 2.7 to 6.8 N·m. The mounting stud option (18 3/8-24 to M8x1 1-3/8 inch hex plate stud) provides flexibility for different installations. Ensure the base is clean and flat for optimal coupling. Allow a 24-hour cure time if adhesive mounting is used. Connect the sensor to a compatible ProTIM option for standard acceleration-to-velocity with acceleration enveloping channel type (-06).
Maintenance & Reliability
Regular inspection of the mounting integrity and cable connections ensures consistent performance. The hermetic sealing (5x10⁻⁸ atm·cc/s maximum) protects against moisture and contaminants, even in 100% relative humidity condensing conditions. The axial shock limit of 49,050 m/s² pk guards against accidental impacts. With proper care, the sensor delivers long-term reliability, reducing total cost of ownership.
Frequently Asked Questions
Q1: What is the sensitivity of the 200157-18-05?
A1: The sensitivity is 10.2 mV/(m/s²) at 80 Hz, with a tolerance of ±12%.
Q2: What temperature range can this accelerometer withstand?
A2: It operates from -40 °C to +105 °C (-40 °F to +221 °F).
Q3: Is the 200157-18-05 suitable for submerged applications?
A3: No, it is rated for condensing, non-submerged environments with 100% relative humidity.
Q4: What approvals does the 200157-18-05 have?
A4: It carries multiple approvals including CSA, ATEX, and IECEx.
Q5: What is the weight of this accelerometer?
A5: The typical weight is 58 g (2.0 oz).
