Purell automated hand sanitizer Purell TFX Touch Free Sanitizer Dispensers – Touch-free dispensing system requires no touch to activate. When sensor detects hands underneath, the battery-powered system automatically dispenses the ideal amount of hand sanitizer for cleansing. Required three standard C-size alkaline batteries (sold separately). Skylight with extra-large window makes it easy to check sanitizer levels. Refill snaps securely into place with an audible click. Sanitary-sealed, collapsible bottle refill keeps germs out. Each 1200 ml. refill is sold separately and comes with a fresh dispensing valve.