(57) The invention provides a burette having a body 1 adapted to receive at one end a
releasable reagent container 3 having a removable end fitting with a cannula 7 such
that the cannula 7 ruptures a self-re-sealing diaphragm of the reagent container 3
when the end fitting is mounted on the reagent container 3, and that the diaphragm
is allowed to re-seal when the end fitting is removed.
The burette also includes an electric linear actuator comprising a stepping motor
8 and a reciprocable drive shaft 9, and includes a re-chargeable battery 10 with power
to the stepping motor 8 controlled by a push button 11.
A further push button 12 re-sets a digital display means 13.
An interface socket 14 allows the burette to be connected to an external controller
such as a microcomputer, and may serve as a power input connector for battery charging.
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