Hi, Unless I'm miss-understanding the nature of your boat, I wouldn't be expecting it to have bilge water on a regular basis? Therefore a load sensing pump will be started up dry every few minutes unitl the seal burns out through running dry. Then when you need the pump it will fail quickly.
A normal float switch with an alarm would be my choice for a dry boat, but the rule auto ones are great for RIBs with wet wells, leaky wooden boats etc where there is enough bilge water to keep the seals cool.
Sorry if this is irrelevant!
Cheers,