Digital Burettes

Digital burettes are based on a syringe design. The barrel and plunger may be made of glass. With liquids that corrode glass, including solutions of alkali, the barrel and plunger may be made of polyethylene or another resistant plastic material. The barrel is held in a fixed position and the plunger is moved incrementally either by turning a ratcheted wheel by hand, or by means of a step-motor. The volume is shown on a digital display. A high-precision syringe may be used to deliver very precise aliquots. Motorized digital burettes may be controlled by computer; for example, a titration may be recorded digitally and then subject to numerical processing to find the titre at an end-point.

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