I have it narrowed down to 2 wireless systems. One is the Innotek Driveway Guardian. Cabela's has it for $180. I called Innotek (800) 826-5527 and asked them who else sells it and they told me Home Depot, Menards and Meijers. I went to all three places in Greenwood, IN and none of them sell it. I'd rather buy things in stores, but it looks like the only way to get this is to order it. It says it uses a "magnetic field sensor to detect any passing vehicle", so it's not just a motion sensor. What worries me is that is says it uses a “water-resistant transmitter”, rather than a waterproof one. This thing is going to have to hold up outside in the hard rains and sometimes in deep snow.
The other is the Dakota system that uses a rubber hose sensor. It costs $159. As far as I know the only way to get it is to order it from their web site. I like the sound of some of it’s features, such as a “weatherproof outside transmitter”, rather than a weather resistant transmitter. But, their web site has a lot of typos in it, which makes me wonder if the quality of their product is as sloppy as their web site. Plus, you’ve already tried one of their other models and it didn’t work like it said it would.
Based earlier posts on this board, the only ones that have a solid reputation are the $500+ ones, and I can't justify spending that much. If one of these will do what it says it will, then either will meet my needs. I just need to decide whether I want a rubber hose laying across my driveway all the time, which I would have to move every time I mow the grass, or the cross shaped sensor at the edge of the driveway which I could probably hide under a bush and never have to worry about.