Bently Nevada 70M303 Wireless Triaxial Vibration Sensor

Product Description

The Bently Nevada 70M303 is an industrial-grade, wireless triaxial acceleration and embedded temperature sensor from the advanced Ranger Pro platform. Engineered for remote, continuous machinery condition monitoring, this rugged transmitter captures precise vibration data across three axes simultaneously. 

Technical Specifications

• Manufacturer: Bently Nevada (A Baker Hughes Business)

• Product Platform Family: Ranger Pro Wireless Condition Monitoring Series

• Model Number Designation: 70M303

• Device Classification: Wireless Triaxial Accelerometer with Integrated Temperature Sensor

• Sensing Internal Axis Layout: True Triaxial Monitoring (Simultaneous X, Y, and Z axes collection)

• Broadband Frequency Range: 0.1 Hz to 20 kHz tracking bandwidth

• Dynamic Acceleration Input Span: $\pm1\text{g}$ to $\pm20\text{g}$ full-scale limits

• Embedded Temperature Sensor Scope: -40°C to +125°C (-40°F to 257°F) operational range

• Wireless Communication Framework: ISA100.11a industrial wireless network standard

• Maximum Wireless Line-of-Sight Range: Up to 150 meters (492 feet)

• Data Transmission Performance: Local transfer rate up to 100 kbps

• Internal Storage Capacity: Onboard logging memory holds up to 10,000 discrete data points

• Operating Current Consumption Profile: Variable 30 $\mu$A (deep sleep) to 30 mA (active transmission)

• Mechanical Mounting Profile: Direct mount with M6 x 1mm internal threads (5mm depth)

• Structural Enclosure Materials: 316 stainless steel base shell paired with a glass-reinforced, impact-resistant PPS plastic cap

• Ingress Protection Safety Rating: IP67 (Dust-tight and submersion waterproof)

• Mechanical Shock & Vibration Boundaries: Survives a 0.5-meter drop onto bare concrete; 20 g peak continuous vibration limit

• Outdoor Altitude Ceiling: Up to 3,000 meters (9,842 feet)

• Hazardous Settings Safety Certification: CSA Class I, Division 1 approved for explosive atmospheres

• Total Weight Properties: 230 g (without battery); 300 g (fully loaded with battery)

Industrial Application Scenarios

The BENTLY NEVADA 70M303 triaxial sensor is widely implemented across hazardous process zones in petrochemical plants, upstream oil and gas production rigs, offshore facilities, and large-scale wastewater treatment networks. It installs directly on the bearing blocks of rotating machinery, including multi-stage centrifugal pumps, industrial cooling tower fans, air compressors, and reduction gearboxes. By monitoring points in Class I, Division 1 explosive zones without needing physical wires to break through containment areas, the 70M303 safely delivers high-frequency vibration spectrum data back to predictive maintenance teams.