**Bruel & Kjaer TYPE 4294** is a **Calibration Exciter** (Calibration Exciter)

for testing and calibration Sensors and vibration measuring equipment are used. This device is designed to provide precise and controlled vibrations so that it can be used to calibrate a variety of vibration sensors and related measurement equipment. This device is normally used for calibration tests in various laboratories and industries. The word "Untested" in the description means that the device has not been fully tested and its working condition is unknown, so it may need repair or inspection. **Bruel & Kjaer** is a reputable brand in the field of sound and vibration measurement and analysis equipment, and their products are globally recognized for their high accuracy and quality.