Thanks to everyone who weighed in on this topic. For now, I've put a new 2423A5 SyncroLinc in place, and it appears to be working well. I get an email every time the pump goes off...which is enough for me to see it's cycling every hour or 45 minutes or.... I also have a backup sump pump that uses AC and a marine battery. The water exits to a different location (very important). If the main pump fails, or the fuse in the SyncroLinc fries, we are at least covered - and we will here the alarm on the backup pump. Heck, I can probably put the other SyncroLinc on the backup pump!
The Mamac CT-800 current sensor solution seems like a more fail safe and interesting idea. I'm just not clear on how much I would need to add to make that work. Of course, if the SyncroLinc fries, I'll be looking at alternatives.
Being a newbie to the ISY994i/PLM world, it's great to see all of the community support provided by everyone! Thanks again.
ps. I'm working on getting other Insteon friends converted over from the 'dark side'...