Brinkmann bottle-top burette 

Manual titration is easier, safer, and more reliable than with conventional glass burettes. Delivery is controlled by handwheels, and the amount dispensed is digitally displayed from 10 μl to 999.9 mL. No reading errors, no exposed glassware to break, no pouring dangerous reagents. Unit fits standard 33 mm screw-top reagent bottle. Telescoping fill tube adjusts to any bottle depth. Powered by rechargeable battery; one charge lasts for at least 500 hours and dispenses 4,500 liters of titrant. Low battery indicator.