Automatic Buret

Solution is protected from contamination of outside elements by automatic, self-zeroing glass burets. White background with red lines and numbers. Flexible vinyl filling tube connects buret top with vinyl bottle stopper and extends into polyethylene bottle. Bottle is held stable by a round polyethylene base. Delivery end fitted into novel plastic push-button stopcock which gives drop by drop delivery. Small screw clamp allows pre-setting drop speed for repeat titration.