Accelerometer for vibration measurement and data storage for previous measurements. It measures acceleration, vibration velocity, and displacement, and has a wide frequency range. This battery-operated handheld device features automatic shut-off. The accelerometer is used as a handheld device for the individual assessment of vibrations in machines and systems. With this device, the current condition can be easily determined on-site, allowing for immediate changes to be made after measurement. The new condition can then also be assessed. Thus, the accelerometer serves as a measuring instrument for relative measurements on various machines and is essential for the predictive or preventive maintenance of production machinery. It is used for quick measurements of unbalance as well as for checking the condition of bearings and gears. Very often, the accelerometer is also used for condition assessment of smaller electric motors.