Bently Nevada 200157-21-05 Enveloping Trendmaster Pro Accelerometer

Key Technical Specifications

The 200157-21-05 offers a sensitivity of 10.2 mV/(m/s²) (100 mV/g) at 80 Hz, with a measurement range of ±245 m/s² (±25 g). Its frequency range spans 10 to 10,000 Hz (600 to 600,000 cpm), making it suitable for monitoring high-speed rotating equipment. The mounted resonant frequency exceeds 20 kHz, ensuring reliable performance across the operating band. Amplitude linearity is within ±2% from 1 to 10 g peak, and transverse sensitivity is ≤7%. The accelerometer settles within 5% of bias in ≤300 ms.

Real-World Applications

For example, in a paper mill, the 200157-21-05 can identify early bearing degradation, allowing maintenance teams to schedule repairs during planned downtime rather than reacting to unexpected failures. Its enveloping channel type (-06) enhances the detection of impact-type faults.

Installation and Setup Guidance

Mount the 200157-21-05 using its 3/8-24 female thread with a mounting torque of 2.7 to 6.8 N•m (2 to 5 ft•lbf). The unit includes a mounting stud option (21) with a 3/8-24 outer diameter to M6x1 inner diameter and a 1-3/8 inch hex plate stud. Ensure the mounting surface is clean and flat to maintain accurate readings. The accelerometer requires an excitation voltage of 4.7 to 5.5 Vdc and draws a quiescent current of less than 800 µA.

Maintenance and Reliability

With a hermetically sealed design (leak rate ≤5×10⁻⁸ atm•cc/s) and 316L stainless steel housing, the 200157-21-05 withstands harsh conditions. Its operating temperature range is -40 °C to +105 °C (-40 °F to +221 °F), and it handles 100% relative humidity (condensing, non-submerged). The axial shock limit is 49,050 m/s² pk (5,000 g pk). Regular inspection of the cable and connector is recommended to maintain signal integrity.

What Is the Bently Nevada 200157-21-05?

Manufactured in the U.S.A., this sensor is part of the Trendmaster Pro family and is engineered for demanding industrial environments.

Compatibility and Integration

The 200157-21-05 works with the ProTIM option for standard acceleration-to-velocity with acceleration enveloping. It outputs a positive signal (SIG+ positive with respect to SIG-) and has an output bias voltage of +2.5 ± 0.23 Vdc. The accelerometer is approved with multiple certifications: CSA, ATEX, and IECEx (option 05).

Selection Guide and Purchasing Advice

Before purchasing, verify that your monitoring system supports the 200157-21-05's sensitivity and frequency range. The unit weighs 58 g (2.0 oz) and measures 17.5 mm x 45.7 mm (11/16 in x 1.8 in). AutoDCSTech offers this Bently Nevada accelerometer with fast shipping and expert support to help you select the right sensor for your application.