A quick demo of the low fuel warning sensor working. This is set with no delay. I think about a 15 second delay will stop false readings due to sloshing and give the sensor tip time to dry of drips which can trigger intermittent positives.
But actually there is nothing to stop the delay being set to a minute which is around what the OEM thermistor device took to respond
In use it will have a shroud which will also stop sloshing and splashing setting it off.
SENSOR DEMO