The invention relates to a digital
burette having a manual drive for suctioning and applying an adjustable
dose volume, a gear unit connected downstream and a digital
display device controlled thereby for setting the
dose volume. The control comprises an incremental
encoder which is functionally connected to the gear unit, at least one sensor for detecting the signals produced by the incremental
encoder and a processor connected to the sensor and the
display device for calculating the
dose volume corresponding to the number of signals. The incremental
encoder is, in particular, a sector disc with two groups of sectors of different
magnetic field strength disposed alternately in the
peripheral direction of the sector disc. A sensor detects the number of turns of the sector disc. To save energy, the power supply of the
burette is ensured by a
solar cell and two spaced sensors are provided for detecting the number of turns of the sector disc to reduce the
clock frequency of the processor for a same measuring accuracy. The invention also relates to a method for displaying the dose volume of such a digital
burette.