Assalamu alaikum beautiful,
I want to sharing about this instrument.
U can call that "sf6 analyzer".
Sf6 analyzer use on the circuit breaker or GIS
This instrument can :
1. Check purity sf6
2. Check dewpoint
3. Check content of SO2
They do it every 12 year... wow, thats meaning manufacturer is so clever because they can make a instrument than can use for a long time....