A Cover-Slip should be placed on top of the O2k-Stopper to minimize contamination and evaporation of liquid extruding from the capillary of the stopper. They do not exert any direct effect on oxygen back diffusion into the O2k-Chamber. Use the the Cover-Slip\black to avoid light penetration and disturbance of fluorescence signals and generally for optical measurements in the O2k.
Two units of this item are standard components of the O2k-Assembly Kit.
Note: Cover-Slips cannot be placed on top of the stoppers in O2k-MultiSensor applications with additional sensors inserted through the stopper, or while TIP2k needles are inserted into the O2k-Chamber.