What is the most common type of centrifuge?

Could you elaborate on what you mean by the "most common type of centrifuge"? There are various types of centrifuges designed for different purposes, such as laboratory centrifuges, industrial centrifuges, and even centrifuges used in medical equipment. Without knowing the specific context or field you're referring to, it's difficult to pinpoint a single, most common type. Could you please provide some more information or clarify your question?