divided column in Kodak thermometer

[Neil Grant]

it's a mercury one...is a fix possible or will it no longer end accurately?

 

[Andrew O'Neill]

When you say divided, you have two bits on top of each other? This happened a few times to me. I stuck the thermometre in really hot water, forcing the mercury up to the top. Then let it settle back down. Always seemed to work.

 

[MattKing]

I always enjoy quoting myself : https://www.photrio.com/forum/threads/kodak-process-thermometer-type-3.137713/#post-1801991

 

[Neil Grant]

..thanks, I think I'll try heating it in hot water as you suggest. I also have a 'type 3 process control' - which I read should last '1 to 2 lifetimes' and since i already have rather less than one lifetime left, maybe it's time I started to use it.

 

[AgX]

Here is an old thread on this.
https://www.photrio.com/forum/threads/can-this-thermometer-be-fixed.128247/


The links to the manufacturer videos I referred to no longer work. They meanwhile got videos on stems with two expansion chambers. Interesting nonetheless:
https://www.ludwig-schneider.de/en/downloads/

 

[AgX]

Here is the full text by Schneider:

 

[mshchem]

We always used dry ice and acetone (or before it was banned HCFC-141b) .

 

[Sirius Glass]

I would first shake it down, then heat and finally cool. Repeating the last two if necessary.