The current required to produce electrolysis is very small, about one milliampere being sufficient.
Its sensibility ought to be such that it is actuated by a tenth of a milliampere, and, if possible, even by less.
milliampere mil·li·am·pere (mĭl'ē-ām'pēr)
Abbr. mA A unit of current that is equal to one thousandth (10-3) of an ampere.