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transducer materials

Old 03-05-2012, 12:05 AM
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Default transducer materials

I'm in the proces of deciding on a transducer and have a question about the materials, bronze or plastic. The bronze ones seem more solid but is that something of a real advantage? Should I pick a bronze transducer, or are the plastic ones good enough?
Old 03-05-2012, 07:05 AM
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One of the more important aspects of transducer selection is mounting location.

Transom mounted transducers are normally plastic and are very hardy.
There are no bonze transom mounted transducers made that I know of.
Transom mounting is the most common for fresh water small boat use and found also on a great many larger salt water boats.
Not recommended for stepped hulls or inboards.

A thru the hull transducer is available in plastic,bronze and stainless.
The bronze and stainless are preferred for large boat and salt water use.
A thru the hull is preferred by many as it is running in cleaner water and is very efficient.
Available in flush mounted and also in fairing mounted.

In hull..also know as "Shoot thru the hull" are plastic and are excellent on solid glass hulls but are not recommended on cored or foam filled ones.


Bronze are the accepted norm for most thru hulls glass boats.
Plastic for transom mounted as there really no other options.

Last edited by semperfifishing; 03-05-2012 at 07:20 AM.
Old 03-05-2012, 07:23 AM
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Thanks.
The boat is an 21 ft I/O, slipped from April to end of October in fresh water but frequently used in salt. Installing a transom mounted transducer means drilling in the transom to attach it and as far I know that is the only place where my boat has wood in the hull so I rather not mess with the transom.
I'm leaning towards using a thru hull one, and those come in bronze or plastic (Raymarine) and I was looking for opinions that can make me help decide..will the plastic ones break or malfunction sooner than the bronze ones....or is that an irrelevant sort of thinking (I am fairly novice about this sort of stuff)?
Old 03-05-2012, 08:21 AM
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The Airmar plastic P319 thru hull is very well made .
600 watts and cone of 45/12..same as the bonze B60 element.
Cost factor is less and it performs as well as its bronze counterpart.

But your selection of plastic thru the hull units is limited to use on hulls of 8 degree dead rise or less.
With a bronze you can mount on hulls up to 24 degrees dead rise.

Another option to keep cost down is the P79 shoot thru...it will work on most glass hulls up to 22 degree dead rise.

Also..you can use the SternMate system to mount a transom transducer with no holes needed to mount.

http://www.sternmate.com/
Old 03-05-2012, 11:02 AM
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Thank you again - I appreciate you taking the time to react to my posts.

Just making sure I understand. My hull has a deadrise of 19 degrees, I did not know that that was a factor to take into consideration. Does that mean the plastic P319 is not the way to go and that I should use a transducer that is tilted to compensate for the deadrise?

One more question, would the B60 compatible with the ST 40 display?
Old 03-06-2012, 01:40 PM
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Originally Posted by Fiesta View Post

Just making sure I understand. My hull has a deadrise of 19 degrees, I did not know that that was a factor to take into consideration. Does that mean the plastic P319 is not the way to go and that I should use a transducer that is tilted to compensate for the deadrise?

One more question, would the B60 compatible with the ST 40 display?
Correct.if you have a 19 degree dead rise then the P319 is not advisable.

You can use a B60-20 for sonar.
20 degree tilted element.

And you can get a B60 for a ST 40 ...but when ordering you need to specify it is for the ST 40 as it uses spade connectors.
Part number B60-20-FISO

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