water level metare

Not before you've done some thinking about what you actually want to simulate!

What are your requirements for this meter?

In what way(s) must it be "better" than your existing meter?

In other words, what is "wrong" with the existing design?

Not before you've done some thinking about what you actually want to simulate!

What are your requirements for this meter?

In what way(s) must it be "better" than your existing meter?

In other words, what is "wrong" with the existing design?

One simple design is to use a potentiometer and an arm with a flotation device. That will give you a continuous measurement.

You can also build a capacitive sensor that measures hwo much water you have in a pipe. Or you could use an ultrasound microphone and measure the time of the sound returning after being reflected by the water surface. You could also use a web camera and perform image analysis of how high the water reaches on a wall or stick. There are a number of other options possible too.

There are many alternatives possible. Use your imagination, and then sit down and figure out the mechanical, electrical and programmatic consequences of the different solutions.

I recently designed a simple and fully functional water level detector for air conditioner water drip trays in computer rooms.
It uses stainless steel contacts, a simple mosfet detector driving another mosfet and relay combo. I feed 12V to one of the contacts, via a 10K resistor, the other contact, when water is present, turns on the mosfet, fires the relay, giving an alarm. I see no reason why the same circuit couldn't be applied to multiple level/trigger points.

Steve

He probably already has a similar solution. Since he did not specify what he meant with "better", I made the assumption that he is interested in a continuous measurements, instead of having fixed detect levels.

.. go to a junk yard and get a gas level sensor from some car. This is the very thing Per suggest.

Erik