The pulse-free dispensing operation of the continuous burettes makes titration safer at high-level precision. The Continuous series can be used for titration agents up to a concentration of 1 mol/l. The patented dual pristons pump provides permanent and pulse-free the liquid requested. Refills are not necessary. The Continuous burette series undercuts the margins of error defined by DIN EN ISO 8655-3 especially in partial volumes. All operation controls and the digital display have an ergonomic and functional design and are arranged clearly. Patented recirculation valve avoids reagent waste. Clear and precise display of titrated volume. Battery-operated, easily replaceable micro-batteries (1.5V). Dispensing volume per hand wheel revolution 2.5ml (Continuous E) 5.0ml (Continuous RS). Device can be rotated on the bottle 360°. Telescopic inlet tube extendible from 200 to 350mm. Adapters for drying tube and filter. Certificate of conformity according to DIN 12600. Accuracy ± 0.2% / Coefficient of variation ± 0.1%.