calor gas reading

i hope this doesnt sound to stupid,  ive got a bulk lpg 1200ltr bottle and i have no idea how to tell how much is in it. ive looked for dials etc but with no joy.  thanks. rob

Goodmorning  roblovesenya, that  sounds  a  big  bottle, you  can  buy  gagets  that  fit  to  gas  bottles  that  tell  you  the  contents, it  isnt  a  belly  tank  is  it ?...if  so  with  mine  you  lift  the  hood  to  check  the  dials.....sounds  good  hanging  clocks , checking  gas  lol  evergreen