A bulk reagent dispenser (BRD) is a type of commercially available laboratory equipment that dispenses liquid reagents in an automated fashion into microplates, multiwell plates, or microplate-like reservoirs, and specifically have the ability to transfer liquid from a "bulk" (i.e. >1L) source reservoir, but still dispense a programmable but relatively small volume of liquid, i.e. 10-500 μL. They are often used in drug discovery or pharmaceutical laboratories. They are distinguished from semi-automated or manual (hand-operated) equipment like pipettes, as well as from automated laboratory equipment that dispenses from relatively small source reservoirs (~10-500 μL) such as acoustic liquid handlers or liquid handling robots.