Small model of the ethanol sensor. 95mm distance between pipe ends.

This sensor has no mounting for universal type (no bolt holes). You can make your own bracket or mount it "hanging" in the connection pipes.

Ethanol sensor that measures ethanol % and temperature of the fuel

Digital output signal that can be connected to Zeitronix meter or motor control

Several control systems support this sensor: Tex ViPec, Link, Haltech, Motec, Megasquirt 3

Good to be able to see how many percent ethanol the E85 you refueled really contains

Ethanol sensor of the flow-through type. Usually mounted on return line

For hose connection (9.5mm pipe) or push-loc

AN6 and AN8 connectors can be found under the accessories tab

Either you use this to just keep track. But a very smart function found in several engine controls is that you can enter compensations for fuel/ignition/charging pressure so that the engine always runs safely. You can drive with E85 in the summer, E73 in the winter and even refuel with regular gasoline without changing the mapping and risking any engine damage. If mapping is handled correctly, it naturally produces the most effect the more ethanol there is in the fuel.

NOTE, since this only has 1 digital output signal, a device is needed that can read out the signal. The amplitude gives the temperature and the frequency gives the ethanol %.

The sensor here is connected to the Megasquirt 3 engine control and here we see the value 81% ethanol in the fuel. So not really E85. The fuel temperature of 16°C is also visible.

With this information to the engine management, it can be made to adjust the fuel folder, ignition folder and charging pressure depending on the ethanol content.

Then you can be sure of not getting any engine damage if it turns out that the petrol station's E85 is not doing what it should. And you can fill up with regular petrol sometimes if you want to "wash the system" or if you want to drive with petrol in the winter.

This similar function is found in several different motor controls.