My 30 year old Signet Marine depth and speed instruments have never failed.
They still sell them and they're rock solid. www.signetmarine.com/. I suspect
you may have water in your cables that is eventually penetrating the impeller.
As to modern the Airmar looks good and is nmea 2000. Jerry J&J
Airmar ST850 Smart Sensor NMEA 2000
Product ID: AM1110-30 MFG ID: ST850-N2
Airmar ST850 Smart Sensor feature embedded micro-electronics. Speed and
temperature signals are processed inside the sensor and can be displayed on any
radar,chart plotter, or device that accepts NMEA 2000 data.
Availability: Usually ships within 24 hours
MSRP/MAP Price $242.73
Our Price
$208.95
Select ST850 Option:
Plastic Nylon $208.95
Bronze $273.95
Stainless Steel $383.95
Qty:
Sent from my iPhone
> On Nov 30, 2016, at 8:51 AM, Della Barba, Joe via CnC-List
> <cnc-list@cnc-list.com> wrote:
>
> For ages I have had a Standard-Horizon SL1 speed log. The instrument
> eventually died and was replaced. The impellor was always getting gunked up
> and then died for good. The instrument died again. I got one instrument and
> two impellors from Fleabay. One impellor died quickly and the other one died
> just now L They were all new in box too.
> I am about ready to just look at the GPS and give up on this. Is there a
> modern speed sensor that actually lasts? I remember replacing a ton of them
> back in the day as an Autohelm dealer.
> Joe
> Coquina
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