In my quest to have more information available to me while I am away, I just installed a Victron Cerbo GX. Btw, very cool. My next add on is to monitor my fuel tanks via the Cerbo that appears on my MFD Garmin 8612 Plotter.

I am trying to identify what kind of Fuel send units are on my 1999 Carver 406. Meaning manufacturer and specs. The only number I see on the 5 hole mounted send unit is 3349-17 A9.
Ultimately The tank level ports on the Cerbo GX can each be configured to work US tank senders (240 - 30 Ohm) standards; or to configure a custom Ohm resistance range between 0 Ohm and 300 Ohm (requires firmware v2.80 or higher). The tank level inputs are resistive and should be connected to a resistive tank sender. The built-in tank sensor connections do not support mA or 0-5V type sensors, this type will require additional accessories or replacement with a resistive type sensor.

In short, I need to know if my Fuel Sender is Resistance or mA / 0-5v It would be ideal if the specific range of resistance was known. Or, any idea of the manufacturer? Google is leading me down too many rabbit holes without specific knowledge. As always, any help would be greatly appreciated.