Bruel & Kjaer 4290 Electrodynamic Vibration Exciter

Overview

The Bruel & Kjaer 4290 is a compact electrodynamic calibration exciter designed to vibrate accelerometers and small components with reliable acceleration control up to 30 kHz. Its rigid construction and floating suspension system provide outstanding frequency response across the calibration range of 200 Hz to 50 kHz.

Key Features

• Frequency range: 200 Hz to 50 kHz
• Maximum force output: 3 N (0.675 lbf) peak at 2.5 W
• Acceleration level: approximately 1 m/s² (0.1 g) with typical 30 g accelerometer
• Built-in control accelerometer for table movement monitoring
• Foam nylon suspension with resonance at 30–100 Hz
• First resonant frequency: above 50 kHz for high-frequency stability
• Operating temperature range: 0°C to 80°C (32°F to 176°F)
• Compact design with rigid construction

Applications

• Accelerometer calibration and verification
• Piezoelectric accelerometer testing
• Vibration transducer characterization
• Environmental testing and quality assurance

Included Accessories

• Foam nylon suspension disc
• Built-in control accelerometer