Recently I was able to buy a Leitz Focometer . It also comes with a sensor which I wonder if it is still good.
The glass is not clear and has an irregular structure.
Does anyone have experience with this sensor? Can you tell me more about it ?
I have no experience with this sensor but I use other sensors. Whether the sensor is "theoretically/technically" accurate or not is not that relevant. You will need to calibrate the sensor to the enlarger, timer and paper anyhow. The only thing that matters is that the sensor is consistent.