What tool is used in the induction method of foam proportioning?

In the induction method of foam proportioning, an educator is the tool used to mix the foam concentrate with water. It operates by creating a venturi effect, which draws the foam concentrate into the water stream as it flows through the educator. This mixing process ensures that the foam is proportioned correctly, allowing for effective fire suppression.

The educator's design allows for a balanced flow of water and foam, maintaining the required concentration ratio as specified for different types of foam. This is crucial in firefighting, particularly for flammable liquid fires, where the application of foam can create a barrier over the liquid fuel, preventing ignition and suppressing fires.

This method is widely preferred because it allows for continuous foam application without needing to stop and manually mix concentrate, thus enhancing the efficiency of firefighting operations.