Log transducer specifications

[cindersailor]

Having just obtained a new Cetrek log head unit (a lot of Cetrek stuff currently for sale at bargain prices on e-bay) I am in need of a transducer to suit. The information I have is that any providing 25000 revolutions per nautical mile will work OK. However, I have no idea whether this is an industry standard or different for each manufracturers transducers. Anyone have any idea? I just hope it is not the reason for the bargain price!

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[misterg]

Not sure if it helps much, but 1NM is 1853 metres, therefore each of your 25000 revolutions must be 74mm - i.e a paddle wheel about 25mm diameter if it has 1 magnet, or about 50mm if it has 2.

Sounds like it's ball-park "normal"?

I've no idea about this instrument, but most have some sort of "calibration" factor that can give >> 50% correction.

Good luck.

Andy

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