I will be placing a "bulk" order (i need 4) for some "float" sensors form Avast marine. Its the same sensor they use in their ATO kit. (more info: http://www.avastmarine.com/ssc/do/product/rigging/Top-off-Kit ) The sensor can come with a variety of plugs (bare wire, apex, digital aquatics..etc) I'm getting bare wire to use with my Neptune breakout box. I have two of these already one for ATO and one for skimmate collection (skimmer shut-off). They cost ~ 60 bucks each one by one, but I am emailing with Avast and they've agreed to provide some bulk pricing (I've yet to hear what they can offer). I think the more volume i can get on this, the more $$ I/We can all save. Anyone interested?