I installed my new KHD director with SA doser 2.1, 4 days ago.
It is up and running ok, no leaks.

But i'm not sure of the next part :

4.12 Mounting the pH-Electrode
After successful calibration, the pH-Electrode can be
installed. To do this loosen the locking nut on the side of
the KH Director and push the electrode into the device or
rather into the measurement cell until it stops. Then turn
the locking nut tight again.
Make sure that the rubber seal is seated correctly and
that the screw connection cannot be loosened, and
ensure that no water can escape.
Tighten the screw connection as tightly as possible to
prevent water from leaking out of the electrode, use an appropriate tool!
TIP
To keep the rubber seal smooth and dense, we recommend rubbing it with
Vaseline thinly from time to time.

At first sight, i don't see this rubber ring?

I have searched on the internet for photo's or a youtube clip where i can see this rubber seal, but didn't find one.

In text, i can't make out if the rubber seal is present and that i'm looking at the wrong place or if i installed the PH probe without the rubber seal.
But then i presume there would be a leakage?
I don't wanna ruin my KHD.

thanks for the info

regards, Nico