Product Overview

The Bently Nevada 70M403 Ranger Pro Tri-Axial Wireless Accelerometer is a wireless vibration sensor for monitoring the mechanical condition of rotating industrial equipment. It measures vibration in three axes from a single machine mounting point and sends the collected condition data through the Ranger Pro wireless monitoring architecture.

In a plant environment, the sensor can be installed on equipment such as motors, pumps, compressors, fans, blowers, and gearboxes. It is particularly useful for assets where installing individual wired vibration channels would require additional cabling, conduit, junction boxes, or field installation work.

The tri-axial measurement arrangement gives maintenance personnel directional vibration information at the selected measurement location. This can be useful when vibration behavior varies between radial and axial directions or when the most significant vibration direction is not known before installation.

Technical Specifications

Product Features

• Tri-axial vibration measurement captures vibration along three axes from one installation point.
• Wireless communication reduces the need for dedicated signal cabling at individual measurement locations.
• Ranger Pro integration supports distributed wireless machinery condition monitoring.
• Compact construction is suitable for installation at multiple machine monitoring points.
• Supports condition-based maintenance by making vibration trends available for equipment assessment.
• Useful for monitoring assets where conventional wired instrumentation is difficult to install or expand.

Working Principle

The 70M403 is mounted directly to the machine structure so that mechanical vibration reaches the accelerometer sensing element. The sensor detects vibration along its three measurement axes and converts the mechanical movement into measurement data.

That data is then transferred through the Ranger Pro wireless monitoring network toward the receiving and analysis layer. The sensor therefore forms the field measurement point, while wireless infrastructure and monitoring software handle communication, storage, trending, and analysis.

For practical troubleshooting, an abnormal vibration value should not immediately be treated as a machine fault. Engineers should first check the sensor mounting, machine operating condition, wireless communication status, and recent measurement trend. A change that appears only after sensor installation or maintenance may indicate a measurement or mounting issue rather than a change in machine condition.

Role in a Ranger Pro Wireless Condition Monitoring Architecture

Industrial Applications

Installation and Maintenance

1. Verify the Model — Confirm that the sensor is the required 70M403 Ranger Pro Tri-Axial Wireless Accelerometer before installation.
2. Inspect the Sensor — Check the housing and mounting interface for visible damage or contamination.
3. Select the Measurement Location — Choose a rigid machine location that provides a representative vibration path from the component being monitored.
4. Prepare the Mounting Surface — Remove dirt, loose material, or other conditions that could prevent proper mechanical coupling.
5. Secure the Accelerometer — Install the sensor using the applicable mounting method and ensure it remains firmly attached during machine operation.
6. Check Sensor Orientation — Record the installed orientation so that vibration measurements from the three axes can be interpreted correctly.
7. Avoid Mechanical Interference — Confirm that covers, guards, cables, or moving parts cannot contact the sensor during operation.
8. Verify Wireless Communication — Confirm that the sensor can communicate with the relevant Ranger Pro wireless infrastructure from its installed position.
9. Check Device Configuration — Verify sensor identification and monitoring configuration before commissioning the measurement point.
10. Establish a Baseline — Record vibration behavior under a known and representative machine operating condition.
11. Review Abnormal Measurements — When vibration changes unexpectedly, compare current data with historical trends and inspect both the machine and sensor installation.
12. Inspect During Maintenance — Check sensor mounting, physical condition, and wireless communication during scheduled equipment inspections.

Compatible System Components

Recommended Related Models

Key Advantages

• Three-axis vibration measurement from one sensor location.
• Wireless installation reduces field signal cabling.
• Compact form factor suits distributed monitoring points.
• Supports vibration trending across rotating machinery.
• Useful for expanding condition monitoring without extensive new signal wiring.

Technical FAQs

What does the 70M403 measure?

The 70M403 is a tri-axial wireless accelerometer that measures machine vibration along three axes. It is intended for machinery condition monitoring rather than general-purpose process measurement.

Why use a tri-axial accelerometer instead of a single-axis sensor?

A tri-axial sensor captures directional vibration information from the same physical location. This can be useful when vibration behavior needs to be evaluated in more than one direction or when the dominant vibration direction is uncertain.

Where is the 70M403 typically mounted?

It is normally mounted directly to a rigid part of the monitored machine structure, close to the component whose mechanical condition is being evaluated. The mounting location should provide a clear mechanical vibration path.

What should be checked if the 70M403 reports an unexpected vibration increase?

Check the machine’s operating condition and compare the new measurement with its historical trend. Also inspect sensor mounting, physical contact, sensor orientation, and wireless communication before determining whether the machine itself has developed a mechanical problem.