I do think that's where it is (after the pump and before the filter) but I'll have to look to be sure.

At first I thought "oh, yeah, just install it somewhere else, easy for HIM to say" but then as I imagined how it fits it probably isn't that big a deal, right? I'd just drill the right size hole in the PVC (with the pump off, natch) and I'd be good to go (leaving the sensor in the other place as a plug). Doesn't sound like rocket science (I remember when I switched the sensor I was surprised it just fit in the hole with no sort of washer -- just real snug).

Anyway, I might give this a try during March (it's getting a little too cool to play around with water right now, although we ARE in Florida).