High-throughput, dual chamber cryogenic grinder with a self-contained liquid nitrogen tub (15-19L) and insulated case. It chills samples in liquid nitrogen then pulverizes them with a magnetically driven impactor. Ideal for oily/resinous cannabis or hemp flower, or edibles that are sticky/gummy or have a high moisture content. Each chamber holds 1 large grinding vial or 4 small vials (with adapter.) Liquid nitrogen tub can be filled manually with a pouring Dewar, with a cryo hose and diffuser from a tank or large portable Dewar, or by using the Auto-Fill option and connecting the mill directly to a 20-22psi liquid nitrogen tank. Easy to use touch screen saves up to 20 grinding programs.