These two stations have to measure the height of the raw material contained in the containers. They are differentiated by how they measure the height: one of them uses a linear encoder, while the other takes the measurement using a potentiometer transductor.

The design of the module allows the study of concepts related to bottle necks, quality control, buffers, statistical control of processes etc.

The checking stations consist of the following modules:
- Measuring.
- Buffer.
- Conveyor belt.