How to Fuel measurement?

[kelly]

I want fuel measurement for a car. what's sensor that i can use to measurement it?

[leptro]

in the elektor 07-08  of this year,
you will find a microlight fuel gauge circuit from jean pierre duval (sound french cocorico).
this could be a good start.

the line below is from the article.

"This is an FHKSC 932-8501 from Digmesa [1] & [2]. This detector can meas-ure fluid flows from 0.03 to 2.0 l/min, equiv-alent to a range of 1.8 to 120 l/hr "

here is the link for the datasheet: www.digmesa.com/digmesa/upload/pdf/FHKSC/ 932-850xxxx_GB.pdf

regards.

[th_sak]

Hi, you can use a pressure sensor like MPX20100P (you can also get free samples) and convert pressure to fuel level. For more on this search Freescale's web site for application notes or read Silicon Chip's article "Pic-based Water Tank Level Meter". In both cases google will help you get the answers.

[kelly]

thanks leptro & th_sak.
I will try to follow your suggestions.

Thanks & best regards.

[jesse]

   You can use a capacitor type system to measure fuel level, take a look
   to this DIY guide:
   http://www.rst-engr.com/kitplanes/KP0006/KP0006.htm
   http://www.rst-engr.com/kitplanes/KP0007/KP0007.htm
   http://www.rst-engr.com/kitplanes/KP0008/KP0008.htm

   Saludos

[oldboy]

In assuming that you are looking for a level measurement and not a flow sensor:

Another type of fuel level measurement makes use of a float that changes a resistive load

an example:
http://www.meder.com/fileadmin/meder/pdf/en/Technical_Documents/Technical_Write-Ups/Fuel_float_sensor.pdf

[LabVIEWguru]

A few years ago I worked on a project to measure a corrosive fluid. First we went to the junk yard and pulled a float out of a gas tank, then later purchased one new. The float had an "arm" with a wiper that moved over a band of resistors. We found out that when you first turn the car on, the electronics "assumes" you are level and stable and stores that value. after that it takes a reading every few seconds and "dithers" or adds algebraically to the stored value because the gasoline slops around so much. This is why you add gasoline to the tank and it doesn't go to full right away. Be sure to limit the current to the resistors or use an op-amp. You don't want to cause a spark while the float is bouncing around.