What sort of RC car? How is it being used?Unless your RC car is going to be running in a straight line at a constant speed a liquid level sensor is going to have problems. The amount of slopping round under acceleration or cornering will be fairly extreme.I'm not too sure about weight sensing either if the car is going to be bouncing around.Interesting problem.Steve
You HAVE to have a small segment of the tank where the fuel can slowly run in/out, but not slosh around. Then you can measure the level in that small segment. At least that is how the big tanks are made.Paul
thanks Paul for the reply, so what sensor must be used ?
Well, the one you asked about is out of stock, so hard to test. Also, it was meant for a plastic tank. Is your tank plastic? And, would the 5 possible levels work for you? What accuracy are looking for?Paul
Is the tank plastic, and does it have one side that isn't near anything metal? You can make your own capacitive sensor with copper or aluminum tape strips on the tank. As stated, you'll need a baffle in the tank to make the level by the sensors stay relatively constant.
Would a flowmeter work?
I don't think it is possible to read from it with arduino, is it ?
If you get one providing an electrical pulse per unit passed, yes. Condition the signal if necessary, feed to a digital input and then just count pulses. One pulse equals xx cc., oz., etc.