Benchtop Centrifuges and Microcentrifuges: Centrifuges, Rotors, Tubes and Supplies Beckman Coulter benchtop centrifuges provide high performance and versatility. Designed specifically for key applications in mind, we offer centrifuges which are ideal for: Fast pelleting; PCR post-reaction cleanup; cell culture, plasma and general purpose separations; DNA sample preparation, subcellular fractionation, and protein identification.