Abstract: Dispenser apparatus for simultaneously providing predetermined equal volumes of liquid to each of a plurality of wells. The apparatus includes a disposable multiple chamber dispenser module having a top surface and a plurality of dependent walls each defining a lower chamber for alignment with a corresponding well. Each chamber has an open lower nozzle end and extends upwardly to an opening in the top surface. A die plate having a plurality of concavities is provided with each concavity having an equal volume and a mouth. Each concavity is defined by an inner surface and corresponds to one of the chambers. The apparatus further comprises diaphragm means having a portion extending across the mouth of each concavity. Each diaphragm portion is movable from a first position across the mouth of its concavity to a second position in surface contact with the inner surface defining that concavity.