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Author Topic:   SONAR Transducer Compatibility With Various Head Units
contender posted 03-01-2011 07:12 PM ET (US)   Profile for contender   Send Email to contender  
Are [SONAR transducers made for a] different sending unit compatible with other units? Say, could you use a Raytheon 50/200 [kHz] transducer with a Garmin fish and chart plotter unit?
Mr T posted 03-01-2011 10:24 PM ET (US)     Profile for Mr T  Send Email to Mr T     
It depends more on the plug than much else. Most transducers are made as OEM units for a large number of electronics companies. For example the transducer on my Raymarine A65 is a P58 model made by Airmar. It can be bought from Airmar with a plug mathcing it to a number of different companies such as Garmin lowrance, and others.

Short answer is the plug may not match, but there may be an adaptor plug to get the ray [Raython?] plug to match your Garmin.

jimh posted 03-02-2011 08:52 AM ET (US)     Profile for jimh  Send Email to jimh     
First, please note that the frequency of ultrasonic SONAR transducers is measured in Kilohertz, not Megahertz.

As for compatibility, it may go beyond just the connector. This is particularly true if the transducer assembly contains other elements such as a temperature sender.

It is true that some depth sounder manufacturers buy their transducers from AIRMAR, but not all SONAR transducers are made by AIRMAR.

In most recreational SONAR sets the cost of a transom-mount transducer is nominal, usually about $100 or less. I'd just get a new one. If asking about a through-hull transducer where replacement would mean hauling the boat and repairing a large hole in the hull, it would be prudent to investigate re-use of the existing transducer. If it is an AIRMAR, you may be able to buy an off-the-shelf adaptor cable to fit it to a new head unit.

If you have a RAYMARINE unit, not a RAYTHEON unit, there is a good chance the transducer is an AIRMAR product. If you actually have a RAYTHEON SONAR, I don't know what sort of transducer you might have. I'd contact AIRMAR for advice.

I am certain that AIRMAR makes SONAR transducers that are compatible with GARMIN sounders, but this does not guarantee that the one in your current boat will be compatible with a GARMIN sounder. However, I'd say the chances are good that it will be.

contender posted 03-02-2011 01:18 PM ET (US)     Profile for contender  Send Email to contender     
Thanks to Both of you, it is a thru hull transducer, and when I had the boat built I had it mounted in the mold, This way the transducer is flush with the bottom of the boat, My boat sits on a trailer so its not to big of a problem. I do not recall what type or make it is, but I know it was a 50/200 [kHz], shaped like a canoe, and made out of brass. It had a separate speed and water temp unit. I guess I will have to talk to some marine electronics specialist to get it working. Worst comes to worst I'll guess I'll have to punch it out and replace it. Thanks again
jimh posted 03-03-2011 12:59 AM ET (US)     Profile for jimh  Send Email to jimh     
Again, the frequency of SONAR transducers is measured in kilohertz, not megahertz.

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