Depth Transducers

[TeamLBN]

The old Seafarer has died and I'd like to replace it with something I can bond to the inside of the hull rather than pepper my Moody 30 with another hole.

How thick a hull can todays' transducers cope with? Does any one know of a particular make that is better than others when bonded rather than drilled through?

Any help gratefully received.

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[cindersailor]

I have a simple Eagle fishfinder which came with the "skimmer" type of transducer that is supposed to be fitted to the transom of a motor boat, it operates at 200kHz. I experimented with fitting it inside the hull and found that it works perfectly attached to the inside of the bottom of my keel with a blob of microfiber thickened epoxy. If you do this be careful to ensure that the epoxy contains no air bubbles as this can affect transmission/reception of the signal. My boat is a 1966 long keeler and the thicknes of the GRP at the keel bottom is likely to be considerable. I suggest you experiment using different locations with the transducer inside a plastic bag of water to get a good acoustic contact with the hull. The advantage of having it located at the bottom of the keel is that the depth you see is the depth you have got, no need to worry about an offset.

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[Talbot]

I replaced my old seafarer with a . This has an optional <A target="_blank" HREF=http://seamarknunn.co.uk/catalog/items/item1278.htm>in-hull mounting kit for the echosounder. The instruments are definetly budget priced, but not budget quality.

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[Georgio]

stick the transducer to the hull with a big blob of sillicone sealant (avoiding bubbles) and Robert will be your fathers brother.

I guess you may lose accuracy when very deep (like 80+m), but for most this isn't a problem.

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[sailorman]

raymarine , mine must "see through" 20m/m of hull & its fine. jush bonded with epoxy

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[Davy_S]

I have an old seafarer transducer still fitted through the hull but the unit had busted. So I bought an eagle fishfinder and connected it up to the seafarer transducer, it works perfectly!

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[Avocet]

There's a good chance it will use a "standard" 150kHz transducer (same as Nasa use) if so I just got one from Seamark Nunn on the internet for £23. Maybe someone who services Seafarers can confirm this?

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[TeamLBN]

Many thanks for the advice - looks like it's worth trying to bond to the inside first and see how it goes.

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