Radio frequency electric field (RFEF) processing is relatively new and inactivates bacteria in fruit beverages at moderately low temperatures. Key equipment includes a radio frequency power supply and treatment chamber that is capable of applying high electric fields. The process is similar to the pulsed electric field process, except that the power supply is continuous rather than pulsed; therefore, the capital costs may be much lower. Using an 80 kW RFEF pilot plant unit, Escherichia coli K12 in apple cider flowing at 1.0 l/min was exposed to 30 kV/cm at 21 kHz. RFEF processing reduced E. coli by 4.8 log at 60 °C, whereas conventional heating at the same conditions had no effect. Similar results were obtained for orange juice and apple juice. The electrical cost of the processing was $0.005 per liter of cider.