Super Beetle 71-79 Sender comparison Empi unmodified V/S OEM. Filling the tank with water.

Update 3/10/2022 I do not recommend modifying the regulator/vibrator mod to 7.5 vdc. See my buck regulator videos.
Showing fuel levels v/s gauge readings. This is with an aftermarket 34 ohm gauge and a 7.5 volt regulator (vibrator substitute). Adding water to the tank and swapping senders, un-modified Empi and an OEM sender.
The Gauge is after market and has been calibrated to the 7.5 volt regulator/stabilizer.