Fuel sensors for light vehicles

Hello Everyone

So, once again, someone asks how to best monitor fuel level inside light vehicles (cars, pickups, 4x4s).

I know that the options out are not great. But unfortunately this is a regular request in tenders and even though we try our best to explain that the solutions won't be great, they still push with this requirement.

We did a trial about 3 years ago with Cellocator and their fuel level gauge reader. As it turned out, the float sensor on the vehicle on which we tried sent out a nonlinear voltage signal.  We were using another platform at the time that didn't support calibration tables so the readings didn't match at all what was happening and we dropped the idea, just focusing on fuel monitoring for heavy vehicles where a capacitive sensor can be installed.

I've been looking around on the forum and here are the two options:

• Fuel floater sensor reader: like this one for example: http://www.guardmagic.com/01-engl/2e-pr … afs2-1.htm
  
• Contactless reader on engine injector: https://www.jv-technoton.com/contactles … ecrocodile

We will try in the upcoming tender to change their minds about spending their money on something that won't really fulfill their needs, but if we can't, I want to know if any of you care to share their experience with these options.

• What can we expect from them?
• What kind of accuracy can you acheive?
• What are the practical limitations?
• What are recurrent issues if any?

Thanks for sharing your thoughts and experience, it will be very much appreciated!

Robert