Matt & Michelle Day, SM#208 SV Talia
All the major electronics brands use the Airmar sensors. All will work on your NMEA2K network.
We elected for a DST810 sensor with the paddle wheel. Now Airmar has recently brought out the DX900 that is all ultrasonic. Seems like a cool piece of kit...lower maintenance for sure. However, I can't seem to find one in stock in the market, and the quoted prices are at least 2X the DST810.
I am now questioning if I change to the DX900, or just have a spare DST810 (clean it in my own time after change).
Either way you will have to replace the original thru hull with a larger unit. We opted for the bronze unit because I just don't like the idea of a plastic fitting as a critical component.