I have not been with them inside their powerplants but from what I was told there can be extreme rough conditions.
Sometimes a K50 falls somewere inside.... whatever that could be. ... and that's just it... .... gone.... who knows, melted in lava?
So yes, one could see it as a pretty destructive use of those cameras... but that's "
Mordor" for you.
We had long time ago another special task for Pentax, some might remember it:
Pentax k10d in space III - PentaxForums.com
I have no access to those powerplants, also no interest really!
The task is mainly for documenting faults and wear, often in low-light (w. flash)
I have no idea what modes they use, but they won't use DA-L kit-lenses anymore (L for Low-Cost)
If one considers that they used hitherto the K50 with DA-L kitlens this is a particular high praise compared to Canon!
Because most K50's were made before 12/2015 and thus prone for ABF (which occured in quite a few of those used in those conditions and yet, they still lasted much longer than Canon!)
@i-trax got the point: LCD's from the K-S2 and K-70 much to fragile/vulnerable for such use. Even the KP-LCD.
My guess is that K5's, K10D and K20D would work as well, K200D not for the AA's... too unconvinient
but only the K5 is good enough for low-light.