Product Description

Overview

The Bently Nevada 121M6469 is a wireless triaxial vibration and temperature sensor engineered for continuous machinery condition monitoring. Designed for rotating equipment, it transmits real-time vibration and temperature data to enable predictive maintenance strategies, helping detect early-stage imbalance, misalignment, looseness, or bearing wear.

Built with 316 stainless steel housing and PPS covers, the sensor is certified for hazardous environments, making it ideal for turbines, compressors, pumps, and motors. Its long-lasting battery and industrial-grade wireless communication protocol provide reliable monitoring with minimal maintenance.

Key Features

• Wireless monitoring of three vibration axes (X, Y, Z) and temperature

• ISA100.11a compliant wireless protocol (2.405–2.48 GHz) with AES 128-bit encryption

• Wireless range: up to 150 m line-of-sight to access points; 100 m sensor-to-sensor

• Replaceable D-size 3.6 V lithium battery with up to 5-year life depending on configuration

• Measures acceleration ±20 g peak, velocity 0–50 mm/s, and temperature -40°C to +120°C

• Rugged, corrosion-resistant housing rated IP67

• Certified for hazardous areas: CSA Class I, Div.1 and ATEX/IECEx Zone 0

Technical Specifications

Applications

• Continuous machinery health monitoring for turbines, compressors, pumps, and motors

• Early detection of imbalance, misalignment, bearing wear, and looseness

• Integration into predictive maintenance and condition-based monitoring programs

• Suitable for hazardous and high-vibration industrial environments

FAQ

Q: What wireless standard does the sensor use?
A: The 121M6469 operates on the ISA100.11a protocol (IEEE 802.15.4, 2.405–2.48 GHz) for secure, reliable communication.

Q: How long does the battery last?
A: The replaceable D-size 3.6 V lithium battery provides up to 5 years depending on sampling interval and configuration.

Q: Can it operate in extreme temperatures?
A: Yes, it supports -40°C to +85°C operation and can measure temperatures from -40°C to +120°C.

Q: Is it safe for hazardous environments?
A: Yes, the sensor is CSA Class I, Div.1 (Groups A-D, T4) and ATEX/IECEx Zone 0 approved.