The Bently Nevada 200157-03-05 is a Connector for industrial control and automation applications.
Bently Nevada 200157-03-05 is an Enveloping Trendmaster Pro accelerometer connector assembly built for roller element bearing and cavitation monitoring. Its 3/8-24 to 1/2-20 UNF mounting stud and multiple CSA, ATEX, and IECEx approvals make it a direct-fit choice for Trendmaster Pro systems.
What Does the 200157-03-05 Connector Do?
This connector pairs the accelerometer with a ProTIM option for standard acceleration-to-velocity and acceleration enveloping. That dual channel type helps you catch early bearing defects without adding a second sensor. Because one device covers both measurement paths, you reduce hardware count and wiring labor on each machine train.

Key Specifications and Cost Impact
- Mounting stud option 03: 3/8-24 to 1/2-20 UNF, 1-3/8 inch hex plate stud — fits common mounting pads, so no adapter machining is needed.
- Multiple approvals (05): CSA, ATEX, and IECEx — one part number serves several plant areas, simplifying spares inventory.
- Quiescent current: <800 µA — low current draw supports longer loop runs and reduces power budget pressure.
- Mounted resonant frequency: >20 kHz (>1200 kcpm) — keeps the measurement band clear of structural resonance for more reliable trend data.
Each of these choices lowers total cost of ownership: fewer adapters, fewer stock-keeping units, and fewer repeat visits to a machine.

Where Does This Accelerometer Fit?
Roller element bearings and certain cavitation effects are the stated applications. In practice, that means pumps, motors, and compressors where bearing wear and flow instability are the main failure modes. Early detection through enveloping lets maintenance teams plan repairs instead of reacting to unplanned downtime.
How Do You Select the Right Variant?
Confirm the mounting thread on your machine pad matches the 3/8-24 to 1/2-20 UNF stud before ordering. Also verify that your ProTIM configuration uses the standard acceleration-to-velocity with acceleration enveloping channel type. TenBN — Bently Nevada Spare Parts supplies genuine and compatible Bently Nevada spare parts, and as a TenBN authorized distributor we help buyers confirm the correct option code.
Frequently Asked Questions
What is This unit used for?
The Bently Nevada unit is an Enveloping Trendmaster Pro accelerometer connector intended for roller element bearing and certain cavitation monitoring applications.
Which approvals does This unit carry?
Option 05 on the Bently Nevada unit provides multiple approvals: CSA, ATEX, and IECEx.
What mounting stud comes with This unit?
The Bently Nevada unit includes mounting stud option 03, a 3/8-24 to 1/2-20 UNF 1-3/8 inch hex plate stud.
How much current does This unit draw?
The Bently Nevada unit has a quiescent current below 800 µA.
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