Wafer for use in selective connecting and disconnecting of plastic tubes

摘要

A wafer for use in the selective connecting and disconnecting of plastic tubes incorporates a fuse in an aperture. The fuse is made of a laminate (28) having light transmission characteristics which change after the wafer and its laminate have been heated. The wafer would be used in a device for connecting/disconnecting plastic tubes wherein the device includes a sensor which would deactivate the device if the sensor (24) detects the change in light transmission characteristics thereby indicating that the wafer had been previously used.