First part, covering capacitance and general sensors design …
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Capacitive liquid level sensors are neat: They have no moving parts, there is no current flowing through the liquid you measure, and the capacitive sensors themselves are fairly easy to build. But of course they come with their own challenges.
We first have a look at the theory of capacitance, in order to understand what influences the capacity of a capacitive liquid level sensor. Then we proceed to do some experiments with different basic capacitive liquid level sensor designs.
00:00 Intro - capacitive liquid level sensing
00:11 Capacitors - what influences the capacity
02:41 Capacitance - the theory without math
14:51 Demo - of parallel plate capacitor
16:31 Experiment 1 - plates close together
19:49 Experiment 2 - plates with cavity in between
22:49 Experiment 3 - plates at distance without cavity
24:39 Experiment 4 - plates outside liquid container
29:28 Experiment 5 - metal container with plate inside
31:50 Wrap-up - next is measuring the capacity, bye
Tutorials • Tutorials
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