The Sterile Sweep unit from Environmental Dynamics Group (Princeton, NJ) combines an oscillating parabolic reflector with a high-output UVC lamp. The reflector keeps the lamp clean and concentrates the UVC into a sterilizing beam that continuously sweeps across a surface such as an air filter or coil. When combined with the company's Dynamic Air Cleaner, the system is designed to provide ongoing biological protection against airborne pathogens like anthrax.