Im using a 12in turkey fryer thermometer for my build using a brass fitting i had laying around.. I modified it a little and drilled a hole tru the center that way u can slide the thermometer in and out to remove the fire basket..Its pretty much same thing carbon posted above. Only thing bad about the turkey fryer thermometer is u can only find it with a two inch dial and most are cheap so im sure they are not very accurate haven't used mine yet so cant really say if it is are not.. If anybody knows where i can get one with a bigger dial please let me know..
BLUE WEBER 22.5 OTG,(OBUDS) OVERBUILT U.D.S, WEBER GASSER