Unfortunately, as many say, the accuracy is not good enough. I bought one that was 4psi larger and a second that was better but still larger. I've tried contacting Milton to see if there's a way to set it up, but haven't received a reply. Pandemic or not, the United States or not, it's just too lazy not to react in any way. My old Syracuse sensors were light, accurate, cheap, and still made in the USA. Too bad they left. The straight head design works great, but am I willing to subtract 3-4psi from the reading every time I fill up? Maybe, maybe not.