A thick film electrochemical microsensor device for measuring or regulating
chlorine and bromine in water, comprising a substrate to which is applied
an optimum arrangement of at least two electrodes. The device is
especially useful for measuring or regulating chlorine and bromine levels
in swimming pool or spa water. A method of measuring or regulating ions of
at least one of chlorine and bromine in water is also described, which
comprises contacting the water with the microsensor of the present
invention; measuring the current output of the microsensor; determining
the level of at least one of chlorine and bromine indicated by the current
output; and generating a signal.
