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Indicated for use in a healthcare environment to reduce microbial populations typically found on a computer keyboard.

The Vioguard self-sanitizing keyboard, or UVKB50, is a keyboard with touchpad which resides in a motorized tray. The tray retracts into an enclosed UV-C treatment device which irradiates the keyboard with UV-C light of ~ 254 nm wavelength generated by two 25 watt ultraviolet germicidal lamps. The device includes dual safety interlocks intended to prevent operation of the UV lamps unless the keyboard is fully retracted into the unit and the unit door is completely closed. This feature is intended to prevent the device user from exposure to UV-C light. The device operations are controlled by a small 8-bit microcontroller. Reading instructions and data stored permanently in its own internal memory and controlling the hardware directly, the tasks accomplished by device firmware/software are the following: - Controlling the motorized slide by activating the DC motor and reading the limit switches which are part of the slide mechanism; - . Controlling the UV-C lamp exposure time, by reading the light sensor and integrating the dosage until a preset exposure is reached; - Determining the dosage setting by reading an internal potentiometer; - I Controlling and reading the state of the proximity sensor; - 트 Calibrating the light sensor at the factory and storing the calibration information in internal non-volatile memory; - 트 Controlling the LED status indicator; - 트 Determining if there is keyboard or touch pad activity; and - l Monitoring the state of the front door. The default disinfection cycle takes 80 to 120 seconds to complete.