12.CF is a dual-track cartridge filter designed for continuous, uninterrupted purification. An integrated backpressure sensor switches the flow of the ethanol-oil mixture to a second track of filters when the first set of filters needs to be replaced. The drop-in filter cartridges are easily swapped in seconds and may be configured as needed for color remediation and removal of particulates. 12.CF is rated for C1D2 workspaces.