Bently Nevada 70M303 Wireless Triaxial Accelerometer

Overview

The Bently Nevada 70M303 is a wireless triaxial accelerometer with an integrated temperature sensor. It belongs to the Ranger Pro series and monitors rotating assets such as motors, pumps, compressors, and turbines. The sensor captures real-time vibration and temperature data across three axes. Therefore, it enables predictive maintenance, supports early fault detection, and extends equipment service life.

Technical Specifications

• Model Number: 70M303
• Sensor Type: Wireless triaxial accelerometer with integrated temperature sensor
• Acceleration Range: ±1 g to ±20 g
• Frequency Range: 0.1 Hz to 20 kHz
• Temperature Range: −40°C to +125°C
• Wireless Protocol: Ranger Pro proprietary communication
• Wireless Range: Up to 150 meters from access point
• Data Logging Capacity: Up to 10,000 data points per sensor
• Data Transfer Rate: Up to 100 kbps
• Power Consumption: 30 µA to 30 mA
• Mounting: Direct mount on rotating machinery
• Environmental Rating: Suitable for industrial and hazardous environments

Acceleration and Velocity Performance

• Acceleration Frequency Range:
  • Z-axis: 5 Hz to 10 kHz (±3 dB)
  • X and Y axes: 5 Hz to 4 kHz (±3 dB)
• Velocity Frequency Range: 5 Hz to 2000 Hz
• Velocity Amplitude Range: 0 to 50 mm/s (0 to 2 in/s)

Accuracy

• Acceleration Z-axis: ±5% at 160 Hz
• Acceleration X and Y axes: ±10% at 160 Hz

Wireless Communication

• Supported Protocols: ISA100 or WirelessHART
• Security: 128-bit AES encrypted packets

Power and Battery

• Battery Type: Replaceable 3.6V lithium-thionyl chloride D-cell battery
• Operating Considerations: Extreme temperatures reduce battery life and may damage the sensor.

Environmental Protection

• Ingress Protection Rating: IP67