Log Transducer

[milfordman]

Some time ago I saw advertised a solid state log transducer that coud be used with any paddle wheel log e.g. a NASA clipper. I would like to use one of these, however I have forgotten what they were called. Does anyone have any experience with them? I would appriciate any info on them.

 

[Leighb]

Don't know if they would work with a NASA or not, but Airmar make a log transducer without paddles.

 

[bedouin]

You might be thinking about "doppler" transducers.

 

[milfordman]

Re: Log Transducer

I recall that it was a doppler effect transducer, does anyone have any experience of the Airmar transducer?

 

[rob2]

Re: Log Transducer

Yes, Airmar make an ultrasonic transducer which gives a "standard" 2,000 pulses per km (if memory serves). They are expensive and no longer generally offered by instrument makers. I don't know whether this is because they are less than reliable or because they can't sell them at the price.

 

[bedouin]

Re: Log Transducer

I seem to recall looking at these a few years ago and coming to the conclusion that it was not worth it.

I seem to recall hearing that they were potentially unreliable in shallow water - but I may be wrong about that