Bently Nevada 121M6469 Triaxial Vibration

The Bently Nevada 121M6469 is a Ranger Pro wireless triaxial vibration and temperature sensor. Specifically designed for rotating machinery monitoring, it provides continuous measurement of vibration and temperature while transmitting the data wirelessly for predictive maintenance.

• It helps detect early signs of issues such as imbalance, misalignment, looseness, or bearing wear.

• Built with rugged materials and certified for hazardous environments, the 121M6469 is commonly used in turbines, compressors, pumps, and motors.

Technical Specifications:

• Model Number: 121M6469

• Type: Wireless triaxial vibration and temperature sensor

• Wireless Protocol: ISA100.11a (IEEE 802.15.4, 2.405–2.48 GHz)

• Wireless Range:

• 150 m line-of-sight to access point

• 100 m sensor-to-sensor

• Security: 128-bit AES encryption

• Power Supply: Replaceable D-size 3.6 V lithium battery

• Battery Life: Up to 5 years (depending on interval and configuration)

• Measurement Axes:

• 3-axis accelerometer (X, Y, Z)

Acceleration Measurement:

• Frequency Range:

• Z-axis: 5 Hz–10 kHz

• X/Y axes: 5 Hz–4 kHz

• Range: ±20 g peak

• Accuracy:

• ±5% (Z-axis)

• ±10% (X/Y) at 160 Hz

Velocity Measurement:

• Frequency Range: 5–2000 Hz

• Range: 0–50 mm/s (peak or rms)

Temperature Sensor:

• Range: −40 °C to +120 °C

• Accuracy: ±1 °C typical, ±3 °C maximum

• Resolution: 0.1 °C

Waveform & Spectrum:

• Configurable with multiple sample sizes and frequency bands

• Housing:

• 316 stainless steel with PPS cover

• Ingress Protection: IP67

• Operating Temperature: −40 °C to +85 °C

• Weight: 300 g (with battery)

• Mounting: M6 × 1 thread, 5 mm deep

Hazardous Approvals:

• CSA Class I, Div. 1 (Groups A–D, T4)

• ATEX/IECEx Zone 0 (Ex ia IIC T4 Ga)