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Bently Nevada 70M303 Ranger Pro Wireless Condition Monitoring Sensor

The Bently Nevada 70M303-AXX-BXX-CXX-DXX, also cataloged as the 70M303 Wireless Condition Monitoring Sensor, operates as a dedicated hardware component for tri-axial vibration and surface temperature measurement within the Ranger Pro Wireless Condition Monitoring network.

Suffix Breakdown & Model Matrix

The 70M303 model uses configurable suffix selections for mounting, radio communication, battery supply, and certification options.

Suffix	Option Description	Available Configuration
A	Mounting Hardware	00 No stud; 01 M6x1 to M8x1.25 tri-axial alignment stud; 02 M6x1 to M8x1.25 adapter stud; 03 M6x1 to M6x1 stud; 04 M6x1 to 1/4-28 adapter stud; 05 M6x1 to 10-32 adapter stud; 06 M6x1 to 3/8-24 adapter stud; 07/08 tri-axial alignment studs; 09 M6x1 epoxy cementing pad
B	Radio Option	01 ISA100.11a wireless communication
C	Battery Option	00 No battery; 01 Battery supplied and not installed
D	Agency Approval	01 CSA North America; 02 ATEX/IECEx hazardous area certification

Hardware Specifications

Parameter	Specification
Model	70M303-AXX-BXX-CXX-DXX
Brand	Bently Nevada
Product Series	Ranger Pro Wireless Condition Monitoring
Device Type	Tri-axial Wireless Accelerometer Sensor
Origin	USA
Weight	Approx. 230 g without battery; approx. 300 g with battery installed
Dimensions	88 mm height x 40 mm diameter
Operating Temp	-40 deg C to +85 deg C
Power Consumption	Battery powered, configuration dependent
Sensor Type	Tri-axial piezoelectric accelerometer with integrated temperature sensor
Measurement Axes	X, Y, and Z axes
Acceleration Range	+/- 1 g to +/- 20 g
Surface Temperature Measurement	-40 deg C to +125 deg C
Temperature Resolution	0.1 deg C
Wireless Protocol	ISA100.11a
Radio Frequency	2.4 GHz ISM band
Data Encryption	128-bit AES
Battery Type	User-replaceable D-size 3.6 V lithium-thionyl chloride battery
Battery Life	Up to 5 years depending on sampling configuration
Enclosure Protection	IP67 sealed stainless steel and PPS housing
Shock Resistance	0.5 m drop onto concrete

Rotor Dynamics and Vibration Signal Processing Features

The 70M303 applies Bently Nevada vibration monitoring technology for rotating equipment condition analysis. Moreover, the sensor captures acceleration, velocity, timebase waveforms, spectra, and PeakDemod spectrum data for mechanical assessment.

The device measures three-axis vibration responses to support rotor dynamics evaluation. In addition, the sensor architecture maintains signal integrity through controlled measurement paths and minimizes environmental interference during wireless data transmission.

For rotating machinery applications, the wireless sensor complements traditional Bently Nevada monitoring systems by providing vibration data acquisition without permanent signal cabling. Therefore, it supports condition monitoring configurations where direct wiring installation is restricted.

Frequently Asked Questions

Q: What vibration signals can the Bently Nevada 70M303 measure?
A: The 70M303 measures tri-axial acceleration data and provides vibration analysis outputs including velocity calculations, timebase waveforms, spectra, and PeakDemod spectrum data.

Q: Does the 70M303 require external wiring for signal transmission?
A: No. The sensor uses ISA100.11a wireless communication at 2.4 GHz to transmit collected condition monitoring data to compatible wireless infrastructure.

Q: Can the battery be replaced in the field?
A: Yes. The 70M303 uses a user-replaceable D-size 3.6 V lithium-thionyl chloride battery. Field replacement procedures must follow applicable hazardous area requirements when certified versions are installed.

Field Installation Guidelines

• Install the sensor on a rigid machine surface to maintain accurate vibration coupling.
• Select mounting hardware according to the mechanical interface requirements of the monitored equipment.
• Ensure the mounting surface is clean and free from excessive corrosion, paint buildup, or contamination before installation.
• Maintain appropriate wireless communication clearance between the sensor and ISA100 network infrastructure.
• Route nearby electrical cables away from the sensor mounting area when possible to reduce electromagnetic interference.
• Verify sensor configuration, wireless provisioning, and measurement direction before placing the device into continuous monitoring service.
• For hazardous area installations, confirm that the selected 70M303 configuration matches the required CSA or ATEX/IECEx certification.

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