Introduction to Can Liquid Level Detection Methods

Can liquid level detection primarily utilizes photoelectric, ultrasonic, capacitance, weighing, and X-ray technologies for automated, real-time monitoring, ensuring that filling accuracy meets standards. The following are the main detection equipment and their technical features:

Detection Equipment Types

1. Photoelectric Liquid Level Detection Equipment

This determines liquid level by emitting an infrared beam and detecting changes in refraction. It is suitable for transparent liquids (such as soda), with an inspection rate of up to 200 cans per minute, effectively eliminating products with low liquid levels due to filling errors.

2. Ultrasonic Liquid Level Detection Equipment

This measures liquid level by emitting ultrasonic waves and calculating the time difference. It is suitable for foamy liquids such as beer, with an error controllable within ±1 mm, making it suitable for complex production environments.

3. Capacitive Liquid Level Detection Equipment

This measures liquid level by changes in capacitance. It is suitable for non-transparent liquids such as ketchup in metal cans. It can quickly identify anomalies and adjust parameters to accommodate different can sizes.

4. Gravimetric Liquid Level Detection Equipment

This determines liquid level anomalies by comparing weighing weight to a standard weight deviation (e.g., ±5 grams). It is commonly used in juice filling lines.

 5. X-ray Liquid Level Inspection Equipment

Cans are transported through an X-ray transmission channel. Utilizing the principle of X-ray penetration, cans with different liquid levels create different projections at the receiving end, displaying different numerical values. Upon receiving a signal of a defective product, the system determines whether the liquid level meets the requirements based on user-defined standard parameters. If a can is deemed unqualified, the inspection system automatically rejects it.

Typical Application Scenarios

High-speed production lines: For example, the MT-HFX-06 X-ray liquid level inspection machine can inspect 72,000 cans per minute, with an integrated rejection function to increase production capacity.

Multi-parameter Inspection: Some equipment can simultaneously inspect liquid levels, lids, and other parameters.

For example, Jinan Maotong Inspection Equipment Co., Ltd.'s high-frequency X-ray liquid level inspection machine can process 72,000 cans per hour.

Technical Advantages:

Supports online real-time monitoring, reducing labor costs

High accuracy (detection accuracy ±1 mm error)

Compatible with various liquid types (transparent, foamy, and opaque)