Can this liquid level sensor be used to detect no liquid?

Projects General Guidance
1

So I found this non-contact liquid level sensor online shown in the links below,

and

https://store.arduino.cc/usa/gravity-sensor

every tutorial I see online uses this sensor as a way to detect when liquid finally reaches it, then buzzes. Is there a way to have this sensor sense when the liquid is NOT there instead? e.g. can I use this on a project I'm doing to detect when a liquid is low in a tank meaning it'll buzz when the liquid is not there anymore

2

As long as the container is not metallic, the documentation makes no mention of a problem to do what you plan.
Paul

3

Do you think this something I can code? For it to buzz with no liquid presence instead?

4

Yes, you can code that.

Start by studying the tutorials and figure out how the existing code works. Once you understand the code, it is a simple step to modify it to do what you want.

5

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