I have been a frequent user of arducopter for my gasser heli and recently we have developed a sensor that is very much needed for the gasser helicopters that is connected to autopilot via I2C port and reporting the fuel level based on a converted voltage reading. So that the users can set up the failsafe levels like using a battery powered helicopter and do not need to worry about what happens next when fuel level is low. It does also report fuel level in PWM values as well.
I am attaching some pictures of the product and we are going to be ready to take orders soon for this model. It is better to use the sensor for fuel tanks capacity of 650 cc or above. Minimum probe length is 100 mm up to 2000 mm.
One advantage of this sensor is for the plane users which is while flying invert the sensor is adapting itself to the flight mode and keep on reporting as usual.
If anyone is interested in, can contact me via firstname.lastname@example.org.