A Citrus juicer is a device that basically squeezes the juice out of a citrus fruit, the fruit must be cut in half before use and most of the pulp stays on the half fruit.A CentrifugaljuicerJuicesharderandwholefruits byspinning them through afinemesh. Thiswillresult in pulp build up, usually in a storage device, and also a large amount of juice.