[ELI5] How does a rice cooker “know” the timing to switch from cook to warm when there’s no more water in it?

Question

[ELI5] How does a rice cooker “know” the timing to switch from cook to warm when there’s no more water in it?

In: 825

Answer 1

the cheap ones have a spring in them. the combined weight of the rice and water in the inner pot compress the spring, allowing the bowl to contact the heating element and as the water evaporates from turning into steam, the weight lessens and the spring expands pushing the bowl away from the heating element.