Bought for a mower. No way to test known pressure levels, but seems to work well. My higher gauges seemed to pump a lot and the tires were very stiff considering the 10 and 14 pound recommendations. I'm not sure the actual pressure matters that much. The mower has equal left to right pressure and relative front to back pressure so the deck cuts straight. As long as you set the same pressure every time you mow, the height adjustment will also remain the same. Either way, it's easy with this sensor, and I feel like I'm close to the recommended level.