The Bunn 03803.0000 Coffee Float Switch is a reliable liquid level monitoring sensor designed to maintain proper water levels and prevent dry-tank operation in commercial coffee brewers. This electro-mechanical sensor works by utilizing a buoyant float that rises and falls with internal water volume, actuating an internal switch mechanism that signals the main control system to fill o... https://partsfe.ca/float-switch-for-bunn-part-038030000