Great Johnny, those are the ones that I bought. Small, lightweight, and can be adjusted to fit in a tight spot.
If used in a sump for auto topoff, drill your hole higher and adjust the wingnut so that the float is vertical (wish I would have before I drilled). It will give a bigger gap from the valve to the water and allow for more adjustment of depth if needed. Also, the metal screw and wingnut can be replaced with nylon if metal near the sump is a concern. Mine gets planty of salt spray from my overflow, but I'm not worried.
Shoot me a pic when you get it installed! GOOD LUCK!