Universally usable bottle top dispenser for HF and other extremely aggressive liquids, with reagent recirculation system, digital volume setting in various steps. Piston, cylinder, valve seats and balls made of highly pure ceramic (Al2O3), valve springs are made of platinum / iridium, autoclavable at 121 °C. Supplied completely with thread A 45 mm, 3 thread adapters (A 32, S 40 and A 38), 1 screw-coupled suction tube, 1 recirculation tube, 1 discharge tube unit complete, with individual serial number and single calibration report. With declaration of conformity acc. to DIN 12600. Division: 0.25 ml. DAkkS-Certificate (former DKD Calibration Certificate) is available on request.