Large and expensive automated sealers require a compressed air supply to operate. Porvair’s compact MiniSeal II just requires plugging into a single electrical outlet to operate. It comes with adapters enabling it to process deep-well, shallow-well, low-profile deep-well, filter and assay plates that conform to the ANSI / SLAS standard format. Adapters not in use are designed to stack on top of the unit. Sealing times for most polypropylene plates are less than three seconds each. The compact footprint—about the size of a sheet of A4 paper—means it will fit just about anywhere. Porvair Sciences Ltd.