This is the company he uses. he wanted to do it a while ago. but they just recently made it $$ feasible for him to do so. of course a small group of locals think he is spying or doing something with it? so they dont want it. even though it knocks some $ off the rate. funny... battery powered sits 1' above tank mounted on pvc. You can set it for whatever size tank and it does the math itself http://www.tanklink.com/TankDataOnline