How Automatic Can Level Detection Works in Production Lines

Automatic can level detection uses advanced non‑contact sensors to measure liquid height inside sealed or semi‑sealed cans. The four most common technologies are photoelectric detection, ultrasonic detection, laser detection, and machine vision detection.

Photoelectric sensors emit infrared or visible light to identify liquid surface position. They are widely used for transparent liquids such as water, juice, and soft drinks.

Ultrasonic sensors use sound waves to measure distance, making them ideal for opaque liquids like milk, coffee, and energy drinks.

Laser sensors provide ultra‑high precision up to ±0.1 mm, suitable for high‑end beer, sparkling drinks, and premium beverages.

Machine vision systems use cameras and AI algorithms to inspect liquid level, cap placement, seal quality, and label position simultaneously.

All these systems support automatic rejection, data recording, fault statistics, and remote monitoring, enabling full production traceability required by international importers.