Bruel & Kjaer 4808 Vibration Exciter

Overview

The Bruel & Kjaer 4808 is a high-quality vibration exciter designed for demanding applications requiring sustained operation under heavy loads at high g-levels. It excels in accelerometer calibration, educational demonstrations, structural response testing, vibration testing of small objects, and mechanical impedance measurements. The system can be driven by any amplifier up to 15A RMS without assisted cooling, or by the optional power amplifier type 2719 (180VA).

Key Features

• Low cross motion for precise vibration control
• Low distortion with highly damped axial, transverse, and flexural resonances
• Capable of exciting heavy loads to high g-levels
• Compatible with standard laboratory amplifiers up to 15A RMS
• Proven design for long-term, trouble-free operation

Applications

• Accelerometer calibration and verification
• Structural response and vibration testing
• Mechanical impedance measurements
• Educational demonstrations of vibration principles
• Vibration testing of small mechanical systems