I wonder what the problem might be with this particular internal float switch, if any. The presenter said the old pump had a good reliable run for ten years. Then said they designed the new one to address some concerns but did not elaborate.
I wonder if the new electronic, oil sensing switch got the nod simply because it added the sustainably feature. That is to say, it won't pump oil out of the bilge into the surrounding waters.
I'm not anti-green by any stretch, and I suspect a small amount of oil won't shut it down. Maybe it takes an oil spill
in the bilge to do that. But he did say if it detects "any oil" it shuts down, though he was emphasizing sustainability at that moment.
Unfortunately if it rained for 40 days and 40 nights my bilge pump would get a workout. And every time I overfill the water tanks
the vents on them test my bilge pump, so mine seems to be reliable with a wet bilge and a fair amount of debris trying to clog things up. ... I know... I'm working on it.
edit to add, ... Bill, I did not see your reference to a small amount of oil could "stuff" the switch so to speak before I posted this.