Paul, just out of curiosity, what is it on the water meter that you're
affecting the Hall Effect switch with ? And what is the switch part
number ? I've found Hall Effect switches to be generally "clean"
and less prone to bounce than mechanical switches, although that
can depend on what you're using to cause the device to change its
output. An iron cog with a magnet to concentrate the flux is a reliable
influence for the linear or Schmitt Trigger devices, especially if it's
mounted solidly, ie no mechanical slop which changes the field strength

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