[Public-List] In-Hull Transducers

[dterrell1 at charter.net]

Miy boat uses a large pvc pipe filled with mineral water. The tranducer is not epoxied to the hull; it is placed just above the boat's hull and stabalized so it does not move.I  could share if anyone would like to see how it is stabilized. The only problem I had was that the mineral oil level went down resulting in false readings. The solution was to put more mineral oil in and see that it was better sealed. I think it evaporated rather than leaked out, but I have not tested either of these theories. It is my understanding that this installation for the depth transducer works on our boats because the hull lacks a core. Not having to drill another hole in the boat is a good thing. One thing to consider is the placement of the transducer. On my boat, it is located so it points as directly down as possible when the boat is floating on its lines. (If it were placed too far up the side of the hull, the readings would be misleading.) The result is that the readings are as accurate as possible when are coming into harbors and operating in shallow water.  When heeled, the readings make sense given our rather deep bay. I have never tried to figure out how much the angle of heel would affect readings at a given depth and incline of the bottom level, but I suspect it could be done with some math and some reasonable assumptions..  

David 432
---- jon <whittle at shaw.ca> wrote: 
> The transducer definitely needs to be surrounded by fluid, water, antifreeze 
or apparently mineral oil. Regardless there needs to be no air bubbles. Some 
transducers are permanently epoxied in place but this can be dodgy since 
they might not work in the precise place that you have just stuck them to!! 
Jonathan.
----- Original Message ----- 
From: <crufone at comcast.net>
To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
Sent: Sunday, December 28, 2008 8:23 AM
Subject: Re: [Public-List] In-Hull Transducers


>
>
> Mike,
>
> Is that "tude" or "tube"? Would you be a little more descriptive? Does the 
> Transducer need to be surrounded by some liguid to function properly?
>
>
>
> Michael
> ----- Original Message ----- 
> From: "Mike Lehman" <sail_505 at hotmail.com>
> To: "Alberg 30 Public List -- open to all" 
> <public-list at lists.alberg30.org>
> Sent: Sunday, December 28, 2008 10:32:01 AM GMT -05:00 US/Canada Eastern
> Subject: Re: [Public-List] In-Hull Transducers
>
>
> Mine is installed on the port side under the setee aft of the bulkhead to 
> the head. It is installed in a 'tude' thatis glassed to the inside of the 
> hull that is filled with antifreeze. It was installe by Bob Leigh before I 
> bought the boat (31 years ago). It has always worked fine and needs no 
> maintenance. Mike Lehman 
>  ><((((º>`·.¸¸.·´¯`·.¸><((((º>`·.¸¸.·´¯`·.¸><((((º> > From: 
> examiner at cfl.rr.com> To: public-list at lists.alberg30.org> Date: Sat, 27 Dec 
> 2008 19:25:34 -0500> Subject: [Public-List] In-Hull Transducers> > Hi 
> All,> > > > As a new Alberg 30 owner I would like to wish you all a Happy 
> New Year. I’m> sure mine is going to be exciting.> > > > I am planning on 
> installing a new depth sounder with an in-hull transducer> and would like 
> to know if anyone else has done so, and if so, where did you> determine 
> the best location for the transducer.> > > > Thanks for any help you can 
> provide.> > > > Cheers,> Bongo Bob Norway> S/V Beowulf> > #488> > TLCB 
> Webmaster> www.tlc-brotherhood.org> > ~~~~~> Õ¿Õ¬> ~~> V> > 
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