Water sensors - Experience with them in a crawl space?

I just had my crawl space encapsulated.  The contractor put 2 of the sensors down there that will start screaming if there is water..... To disengage them you have to crawl under and flip them or something.  I think I would rather try the ones that Simplisafe offer.... this way if were not home or my wife is home alone (which she is not able to crawl under there) I could get an alert via Simplisafe instead.  Any issues or gotchas with using these in an encapsulated crawl space before I buy a few?