Photo of the installed water intrusion alarm. Note the pink colored wire pair wired
across the test button. If the other end of the wire pair gets wet, the alarm will sound.
Note the edge of the blue note paper under the alarm with instructions if the alarm goes off.
|Hello Ed; recently
I spent a
couple of days searching the web for a reliable water/leak sensor for
our washing machine, however, the reviews for those I found were not
very good. Well I was just about to give up when I came upon your
terrific idea using a smoke detector for the task. I am always
delighted when I find a way to re-purpose an existing item, while
saving money and learning; and your's is a really good one.
After updating our smoke and CO detectors I had saved the older one for some future project and so I decided to give it a try and it worked just great! Because the bottom of the washer has a metal pan with large recesses in it I wanted to locate it there. Of course the metal was a problem so I had to come up with something that would serve as a dielectric and still work well in a leaking situation. What I finally came up with was a (dry) kitchen sponge(3"x4"x1/2"); the kind you find in the dollar stores. Anyway, I stripped about one inch of insulation from the wires, tinned them and inserted them about 1/2" apart into one end and set it on the bottom of the pan. When I wet that end of the sponge with about a tablespoon of water the alarm responded immediately. I am telling you this in the hope that it may be helpful to you or someone else in the future just as your idea helped me.
In any event, thanks for sharing your ideas and for the rest of your site which I enjoyed immensely. Reading about your work, vacations, the family album and the garden, one of my personal favorites, was quite pleasurable as I enjoyed it immensely.