There are several versions of this. One comes with a monitor for your RV. It doesn't read and only reads on your phone. The application is great. I installed it in the bottom center of the tank and followed the instructions to get the tank levels. The app uses 20 pound tanks by default, so I showed both full. I changed the value to 30 pounds and it returned 60% correctly. This is a great idea if you have 2 tanks and an auto switching regulator. Instead of just turning on 1 tank, turn on both and it will tell you when you're done. So I don't have to get up in the middle of the night to turn the heating or hot water back on. Pros: Wireless Closes tanks of different sizes. Ease of installation. Cons: This one doesn't have a separate monitor, just a cell phone. Get an accurate reading It doesn't take anything to remove the stars and has worked great so far! I'm thinking of buying one for my grill and patio heater. Some people had problems with their feet but not me. Let's see what happens in winter.
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