so does a water one I put some on a big 3 foot wide beltsander at a factory that was on fire . I opened the side door on it and squirted it in all the sawdust blew out and flared up shut the door and fire brigade came and put it outYou need to be very carefull with co2 if wood dust is around, what may be a small burning/smouldering fire may posibbly turn into a fire ball as the co2 blows the dust everywhere and it ignites.
The problem with powder is not only the initial mess that they create, but also the long lasting corrosion and destruction which continues to happen on anything they get into, I've always been wary of the damage they could do to machinery and electronics.
I've heard good things about these water mist extinguishers which are supposed to be safe and effective on all types of fires, and much less damaging. However, I've not had any experience of using one so I have no idea if they are snake oil or not - but might be worth checking out.
You can use a "Water Mist" on electrical fires.
Only as a last resort.
dunno how true but someone said it gave off fosgene gas when burnt
Halon is clean (i.e., leaves no residue) and is remarkably safe for human exposure.
What amused me with my second hand CO2 cylinders was the weights marked on the regular inspection labels, they were virtually ALL hand written as 5.0 kG but actually every one was somewhat more than that (no not the horn issue) so some lazy bod in the past hadn't properly measured them.
When you buy a calor gas cylinder the actual fill weight is marked. It's amazing how much it varies. Supposed to be 15kg but I have seen 17.8kg. I always go for the fullest oneThat is one of the tings that annoy me when doing a CO2 service, No one weighs them.
I had a steel body CO2 for 8 years it was marked at 4.9kg. In the real world it was 6.9kg.