Re: seeking water leak sensor for alarm system

[Rob <spam@xxxxxxx>]

On 22/09/2014 17:11, Don Wiss wrote:
> I have a centralized alarm system with a Napco controller. I'd like to add
> a water leak sensor to it. When I search for sensors I find stand alone
> units with batteries. I don't want a battery. My controller supplies the
> current. I don't want stand alone. I want the controller to sound the
> alarm. Then I find units designed to work with a certain system. Often
> wireless. I don't want wireless. The place where I want to monitor is in
> the cellar, the same place as the controller.
>
> Are there any simple leak sensors I can hook up to my controller?
>
> Don. www.donwiss.com (e-mail link at home page bottom).
>

Hi,

I've designed and built my own here:
http://www.dreamgreenhouse.com/projects/2014/rain/index.php

I'm just in having ten PCBs made up with surface mount components.

It is a wired circuit that uses alternating current to avoid corrosion
and can work with 5V dc to 12V dc.

Output is a switched voltage via a transistor.

Rob