Bently Nevada 3500/70M 136449-09 Impulse Velocity Monitor

The Bently Nevada 3500/70M 136449-09 monitors reciprocating compressor crosshead and crankcase vibration using four input channels. It processes seismic and proximity sensor signals to derive accurate vibration measurements and triggers alarms when thresholds exceed user-programmed limits. Engineers rely on this module for real-time monitoring and predictive maintenance, enhancing reliability and minimizing unplanned downtime.

This RIVM module supports multiple measurement modes, including impulse acceleration, acceleration 2, recip velocity, and low-frequency recip velocity. Users can configure each channel with the 3500 Rack Configuration Software, allowing flexible adaptation to varying compressor conditions. Its integration within the Bently Nevada 3500 Monitoring System ensures centralized data collection and alarm management.

Bently Nevada designed the 3500/70M 136449-09 for harsh industrial environments, including oil and gas, chemical processing, power generation, refrigeration, and pipeline compression. Its compact form factor and low power consumption support efficient installation and continuous operation.

Key Features

Four independent channels for crankcase and crosshead vibration monitoring.
Accepts input from accelerometers, proximity probes, and other industrial sensors.
Measures peak velocity, average velocity, displacement, and configurable alarm thresholds.
Transmits data to central control systems via analog and digital outputs.
Reduces unplanned downtime, extends compressor life, and lowers maintenance costs.

Technical Specifications

Parameter	Specification
Manufacturer	Bently Nevada
Model	3500/70M 136449-09
Product Type	Recip Impulse Velocity Monitor (RIVM)
Number of Channels	4
Input Types	Accelerometers, proximity probes, other sensors
Measurement Parameters	Peak velocity, average velocity, displacement
Alarm & Warning Thresholds	User-configurable
Data Output	Analog and digital
Input Impedance	10 kΩ (acceleration), 1 MΩ (velocity)
Sensitivity	Impulse Acceleration: 0.51–11.72 mV/(m/s²); Recip Velocity: 3.54–22.64 mV/(mm/s)
Power Consumption	7.7 W nominal
Measurement Modes	Impulse Acceleration, Acceleration 2, Recip Velocity, Low-Freq Recip Velocity

Origin, Dimensions & Weight

Country of Origin: USA
Module Dimensions: 241 mm x 61 mm x 241 mm
Weight: 1.5 kg

The Bently Nevada 3500/70M 136449-09 combines precise vibration measurement, configurable alarms, and robust analog/digital outputs to enhance compressor reliability and industrial operational safety.