990-05-70-01-CN | Bently | 2-Wire Vibration Transmitter

Bently Nevada is a global leader in industrial asset condition monitoring and protection, specializing in vibration, pressure, and speed measurement solutions for critical machinery. Founded in 1956 by Don E. Bently, the company pioneered eddy-current proximity probes, revolutionizing rotor dynamics monitoring. Acquired by GE in 2002, Bently Nevada operates in over 50 countries, serving industries such as oil & gas, power generation, and mining. Its product portfolio includes sensors, monitoring systems like the 3500 Series, diagnostic instruments, and predictive maintenance software such as System 1. With over 25,000 customers worldwide, the company combines more than 60 years of expertise with cloud-connected solutions to enhance asset reliability and operational safety.

The Bently Nevada 990-05-70-01-CN is a vibration transmitter designed for industrial machinery monitoring, particularly for centrifugal air compressors, small pumps, motors, and fans. It operates on a two-wire loop-powered system, accepting input signals from 3300 NSv proximity probes with matched extension cables (5m or 7m system length options) and converting them into a 4–20 mA proportional output for machine protection, alarms, and control logic.

Key features include an integrated Proximitor sensor (eliminating the need for external conditioning), non-isolated "PROX OUT" and "COM" terminals for dynamic vibration and gap voltage diagnostics, and non-interactive zero/span adjustments for easy calibration. The device is sealed for high-humidity environments (up to 100% condensation) and supports DIN rail or panel mounting. With a standard range of 0–5 mils (0–125 μm), it is ideal for OEM applications requiring precise vibration monitoring.

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