The first one came with a broken sensor. A replacement was on the way before I sent it back. Before the new one came, I had already bled the cooling system. I don't really need it anymore, but it's cheap and I'm sticking with it. YouTube is your friend, guides are rubbish. I tried it on a water jug and it seems to work. I replaced the air fitting with the correct fitting (I/M industrial connector)
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