Abstract: A fluid dispenser comprising at least one fluid outlet for dispensing a fluid onto an object; a fluid collector for collecting at least some of the fluid after the fluid has contacted the object; and a fluid analyzer for analyzing at least some of the fluid collected by the fluid collector. The fluid dispenser has at least one feature that is selected to cause at least some of the fluid that contacts the object to fall into the fluid collector. The at least one feature preferably comprises at least one of: a location of the at least one fluid outlet; a guide element that guides an orientation of the object; and a dispensing sequence that includes at least two temporally distinct dispensing events.

Abstract: A hand cleaning foam dispenser, including a reservoir providing a supply of foamable liquid; an air compartment providing a supply of air; a foam generator that mixes the foamable liquid and the air to produce a foam; a liquid pump for delivering the foamable liquid to the foam generator; an air pump for delivering the air to the foam generator; and a wave emitter that emits a wave into the air compartment to sanitize the air compartment.