The fault was mine, but another reason I don't care for this gauge, even though I'm still using it....
Went to check my tire pressures today for tomorrow's ride to work. My front tire seems to lose more air while sitting than my back tire and I'm used to that. I checked the front tire and it read "18." I thought, "Man, that's pretty low since it hasn't been that long since I checked it last." So, I aired it up to my usual "30."
I checked the rear tire and was surprised to find the pressure was so low, so I pumped some more into it. My rear hardly ever loses any air even after sitting for awhile.
I started thinking, "Something's not right," so I pressed the button to activate the gauge and maybe pressed it a couple of times more since I couldn't really see the readout and I wound up with fairly normal pressure on the rear tire even though I'd just given it a brief shot.
It turned out I was reading the pressures in k/PA or whatever it is instead of "PSI" So, when I went for my last ride, my front tire was seriously overinflated, like up to 42 psi.
Like I said, the fault lies with me, but it would be nice if you could set the thing to read either Kpa, Bar or PSI. The first time you press the button, it defaults to Kpa, the second time it defaults to Bar and the last time it resets to PSI.
I will be more careful in the future......