3300/25 | Bently Nevada Dual Accelerometer Monitor

Product Overview

The Bently Nevada 3300/25 Dual Accelerometer Monitor delivers reliable seismic vibration monitoring for critical rotating machinery applications worldwide.
It measures absolute machine or structural vibration using two independent accelerometer input channels with high precision.
Moreover, this monitor belongs to the proven Bently Nevada 3300 series, widely trusted in industrial protection systems.
It conditions, filters, and processes vibration signals to support both machinery protection and long-term condition monitoring strategies.
Therefore, operators gain clear visibility into housing vibration behavior under steady-state and transient operating conditions.

Functional Highlights

The 3300/25 provides dual-channel accelerometer monitoring, enabling simultaneous multi-axis vibration measurement from a single module.
In addition, more than 10,000 selectable high-pass and low-pass filter combinations support precise application-specific signal tuning.
Zero-to-peak signal processing ensures accurate vibration amplitude representation for protection and diagnostic purposes.
Moreover, buffered transducer outputs allow direct connection to analyzers, data collectors, and portable diagnostic instruments.
Front-panel status indicators clearly display OK, Alert, and Danger conditions for fast operational decision making.

Technical Specifications

General

• Model: Bently Nevada 3300/25

• Module Type: Dual Accelerometer Monitor

• Series Compatibility: Bently Nevada 3300 rack systems

• Dimensions: 5.7 cm × 20.3 cm × 33.0 cm

• Weight: 1.0 kg

• Operating Temperature: 0 °C to +65 °C

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

• Certification: CE

Measurement and Signal Processing

• Number of Channels: Two independent channels

• Measurement Type: Seismic absolute vibration

• Sensor Input: Industrial accelerometers

• Signal Processing: Zero-to-peak conditioning

• Filtering Options: Over 10,000 high-pass and low-pass combinations

• Filter Configuration: Field-selectable plug-in jumpers

• Buffered Outputs: Available for external monitoring devices

Status Indicators

• OK: Module and sensor operating normally

• Alert: Vibration exceeds configured warning threshold

• Danger: Critical vibration level detected

• Bypass: Channel bypassed for testing or maintenance

Typical Applications

The 3300/25 is commonly applied on steam turbines requiring reliable casing vibration protection.
For instance, centrifugal and axial compressors benefit from its stable seismic vibration measurement capability.
Moreover, large pumps and electric motors use this monitor to detect early mechanical degradation.
It integrates easily into existing Bently Nevada 3300 racks within refinery, power generation, and petrochemical facilities.

Reliability and Service

The module is engineered for continuous operation in harsh industrial environments with minimal performance drift.
Therefore, maintenance teams rely on its long service life and consistent measurement stability.
Bently Nevada documentation and global service support simplify commissioning, calibration, and long-term system maintenance.

FAQ

What type of vibration does the 3300/25 measure?
The monitor measures absolute seismic vibration of machine housings or structures using accelerometer sensors.

How many channels are available on one module?
It provides two fully independent accelerometer input channels for simultaneous vibration monitoring.

Can filter settings be changed in the field?
Yes, filter combinations are easily changed using plug-in jumpers without removing the module.

Is the 3300/25 suitable for machinery protection systems?
Yes, it supports Alert and Danger alarms for real-time machinery protection applications.

Does the module support external vibration analysis tools?
Buffered outputs allow direct connection to analyzers, recorders, and portable diagnostic equipment.