Bently Nevada 200157-03-05 Accelerometer | 1/2-20 UNF

Product Overview

The Bently Nevada 200157-03-05 is a precision-engineered Enveloping Trendmaster Pro Accelerometer designed for advanced machinery condition monitoring. This transducer is optimized to capture high-frequency impact signals, making it an essential tool for identifying bearing wear and fluid cavitation. A key design advantage is its ultra-lightweight construction, weighing only 58 g (2.0 oz). This low mass ensures the sensor does not dampen the high-frequency vibrations of the machine casing, providing the most accurate diagnostic data possible. This model features a 3/8-24 to 1/2-20 UNF hex plate stud for high-integrity mechanical mounting.

Advanced Diagnostics & Enveloping

Specifically built for the Trendmaster Pro platform, the 200157-03-05 delivers high-fidelity acceleration data across a frequency spectrum of 10 Hz to 10,000 Hz. With a mounted resonant frequency greater than 20 kHz, it excels at capturing the rapid "stress waves" emitted by failing mechanical components. Despite its compact 58g frame, it maintains a sensitivity of 10.2 mV/(m/s²) (100 mV/g) and an amplitude linearity of ±2%. This ensures that your maintenance team receives consistent, repeatable data for trend analysis and machinery protection.

Technical Specifications

Mechanical Integrity & Environmental Limits

The Bently Nevada 200157-03-05 is built to endure the harshest industrial conditions. The 58g body is encased in 316L stainless steel and is hermetically sealed to a maximum leak rate of 5x10⁻⁸ atm·cc/s. It is rated for 100% condensing humidity and operates reliably in temperatures from -40°C to +105°C. Its robust mechanical design allows for an axial shock limit of up to 49,050 m/s² peak (5000 g), making it ideal for permanent installation on high-impact machinery in the power, oil, and gas sectors.

Installation & Electrical Performance

The 200157-03-05 operates on an excitation voltage of 4.7 to 5.5 VDC with a quiescent current of less than 800 µA. For optimal high-frequency response, the sensor should be installed with a torque between 2.7 and 6.8 N·m. Because the unit is exceptionally light (58 grams), it can be mounted in constrained spaces where larger sensors would face physical or mass-loading limitations. The use of a shear-geometry ceramic sensing element effectively rejects base strain and thermal transients, ensuring that only the relevant vibration signal is processed.

Technical FAQs

Q1: What is the primary benefit of the 58g weight in the 200157-03-05?
A1: The 58g weight minimizes "mass loading," ensuring the sensor does not alter the vibration characteristics of the machinery surface, which is critical for accurate high-frequency enveloping.

Q2: Does the Bently Nevada 200157-03-05 require a specific cable?
A2: It is designed to work within the Trendmaster Pro ecosystem; for optimal performance and minimal signal loss, high-quality shielded cabling is recommended.

Q3: Is the 1/2-20 UNF stud interchangeable?
A3: The "03" option specifies this particular stud size. While the base sensor has a 3/8-24 female thread, the 1/2-20 UNF hex plate stud provides the specific interface for your machinery's mounting points.