Right from the beginning of their production, ISOLAB burettes significantly differ from the other brands thanks to a special technique called “Accurate Burette Forming” to manufacture the tubings for burettes.
Except very few producers in the world, most of the suppliers use normal tubings to form their burettes but these types of tubings are considered to be more tolerant in terms of wall thickness and diameter. This fact has a significant effect on the inside diameter. Thus, any burette made out of normal tubings shows obvious inconsistencies of volume accuracy and precision on its graduated scale. This is exactly the reason of possible spots on the body to be out of tolerance limits.
With ABF technology, glass tubings are slowly heated up to the required temperature in order to allow the tubes to change their outer shapes exactly according to the shape of a specially made steel rod. Only this way, producers can yield burettes with accurately defined, uniform inner diameters.
ISOLAB burettes are formed by using ABF technology to maintain the inside diameters of the tubings uniform at every point along their graduations. All of the tubings are calibrated individually with the help of this method. Thus, all of the ISOLAB burettes assure you to get the perfect result with exact volume levels even at middle points.
According to DIN and ISO standards, five to seven points between the top and bottom lines should be carefully measured in order to issue a certificate for any burette type. Since ISOLAB burettes are produced with ABF method, the users always get the correct result even while measuring all the lines in between.Finally, all of the ISOLAB burettes are classified as AS according to DIN standards, hence their delivery times are also calibrated and very accurate. These delivery times between 35 and 45 seconds ensure the users to adjust the stopcocks easier and maintain consistency in their operations.