On 7 July 2013 22:03, Rob Kapteyn <[email protected]> wrote:
> My reliable low-tech solution to this has been to use a microswitch with a
> rubber band around it, held open by a sugar cube.
> It is best to use the normally closed contacts.
> When there is enough water to dissolve the sugar cube, the lever moves in
> and opens the contacts.
> This might also be useful as a vermin detector ;)

That works the wrong way round for a ship.  It is necessary to know
when the rats are leaving the ship for it to be useful :)

Colin

> -Rob
>
>
> On Sat, Jul 6, 2013 at 10:40 AM, Peter Hollenbeck <[email protected]> wrote:
>>
>> I am building a 26 foot wood power boat. The bilge below the cabin and
>> afterdeck floor is 7 sealed water tight (hopefully) compartments. I plan no
>> inspection ports but would like a way to detect moisture. If there were an
>> appropriate sensor I could embed one in each compartment and occasionally
>> hook up a Raspberry Pi and check for the presence of water. Cost is a
>> consideration.
>>
>> I would appreciate suggestions.
>> Thanks,
>> Peter
>>
>>
>>
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