Re: please HELP very important... water leakage sensor

Your question is a little confusing but it sounds like you want to use
one of the alarm's reed switch sensors in a separate application as a
water sensor. The simplest ways for you to change the logic of an open
to a close (and vise-versa) = inversion, would be either using a relay
or an inverting opamp circuit to provide the inversion. It really
depends on what type of output the sensor has (sounds like dry contacts
creating a circuit).
More info on application, logic and voltage levels and the sensor is
required.

Is the reed switch switch sensing the water level using a floating
magnet?

Hopefully this is more helpful than Genome's advice.

.

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