An analog tachograph is a device used in vehicles to record speed and driving time. It uses a paper chart to track the vehicle's movement, providing important data for transportation companies and regulatory authorities. The device helps ensure that drivers comply with legal driving limits and rest periods. The analog tachograph consists of a speed sensor and a recording unit. As the vehicle moves, the speed sensor measures the speed and sends this information to the recording unit, which marks it on the paper chart. This data is crucial for monitoring driver behavior and maintaining road safety.