What is the difference between a TopBuret and a dispenser?
A dispenser, such as the Eppendorf Varispenser, delivers a preset volume. A reciprocating pump is used to draw up the required volume and deliver it at once. This process is particularly suitable for identical volumes which are dispensed frequently. With a TopBuret an unknown volume is delivered. With analytical procedures such as the determination of a pH value or titration, liquid is supplied until the required effect occurs. The quantity of liquid delivered is then read off at the burette. During dispensing the liquid is not delivered from a reservoir but is supplied continuously from the bottle.
