9" Vacuum Chamber Digital Heat Pad9" Vacuum Chamber Digital Heat Pad Please Read Before You Buy! Chamber NOT Included, Sold Separately. Heat Pad must fit correct size of the chamber! Fits our 2, 3 and aluminum pots and 3QT & 1GL Flat Chamber This Digital Heat Pad will adhere to the bottom of a chamber vessel with a peel and stick backing. This unit will hold a temperature within a degree to the set temperature (dependent on the environment and air movement). The temperature offset